[PATCH v7 00/13] Add MediaTek MT6370 PMIC support

[PATCH v7 00/13] Add MediaTek MT6370 PMIC support

[ChiaEn Wu]

From: ChiaEn Wu <chiaen_wu@richtek.com>

This patch series add MediaTek MT6370 PMIC support. The MT6370 is a
highly-integrated smart power management IC, which includes a single
cell Li-Ion/Li-Polymer switching battery charger, a USB
Type-C & Power Delivery (PD) controller, dual Flash LED current sources,
a RGB LED driver, a backlight WLED driver, a display bias driver and a
general LDO for portable devices.

In this series of patches, we based on Andy Shevchenko's mfd patch which
is used to adjust the Makefile order.
(https://lore.kernel.org/all/20220801114211.36267-3-andriy.shevchenko@linux.intel.com/)
Among this, we also took some changes for MT6370 drivers, revised the
MT6370 device tree files to comply with DT specifications, and revised
the wrong SoB chain in entire patches.

PS.
"[PATCH v7 06/13] dt-bindings: mfd: Add MediaTek MT6370" depends on previous
DT binding patches, so before applying this patch, please apply other DT
patches first. Thanks!

PS2.
Our MFD DT-binding depends on LED flash and LED RGB DT-bindings, but the
Kconfigs of LED flash and LED RGB depend on MFD. Due to dependency
consideration, we also submit LED flash and LED RGB with other patches
at this time.


Thank you,
ChiaEn Wu
---
Changes in v7:
- In Patch 05/13:
	- Add the second compatible string for 'mt6372'
	- Add 'mediatek,bled-exponential-mode-enable' property for enable the
	  exponential mode of backlight brightness
	- Add validation for the maximum value of 'default-brightness' and
	  'max-brightness'

- In Patch 07/13:
	- Move '#define MT6370_REG_MAXADDR' to the next line of
	  '#define MT6370_REG_CHG_MASK1'
	- Rename 'MT6370_REG_ADDRLEN' to 'MT6370_MAX_ADDRLEN'

- In Patch 08/13:
	- Revise 'devm_add_action_or_reset(dev, ...)' to one line
	- Revise 'return regmap_update_bits(...)' with using positive
	  conditional

- In Patch 09/13:
	- Add AICR(100mA ~ 350mA), ICHG(100mA ~ 800mA) macros
	- Remove 400mA AICR and 900mA ICHG macros
	- Revise using 'if-else' to 'switch-case' in mt6370_adc_read_scale()
	  where the adc channel is ibus or ibat

- In Patch 10/13:
	- Revise the method to enable/disable irq
	- Revise all 'if (ret < 0)' to 'if (ret)' after using
	  mt6370_chg_field_set/get()
	- Revise all 'OTG' text

- In Patch 11/13:
	- Add the comment for the union of 'struct mt6370_led'
	- Revise the wrong description of 'Authors'
	- Revise some typos (e.g. led --> LED)
	- Revise 'if (!fwnode_property_read_string())' to
	  'ret = fwnode_property_read_string()'
	- Replace 'memcpy(...)' with 'put_unaligned_be24()' in
	  mt6370_gen_breath_pattern()
	- Replace all 'LED_OFF' with 0
	- Remove the redundant assignment in mt6370_mc_pattern_clear()

- In Patch 12/13:
	- Fix the indentation.
	- For the well defined macro, the parenthesis is needed for input parameters.
	- Replace some dev_warn to dev_info in 'init_flash_properties'.
	- Add sentinel comment for the terminator entry of of_device_id.
	- Use priv->fled_torch_used directly.
	- Delete 0 in {}.
	- Use _uA instead of _UA in definition.
	- Refine the description.
	- Use usleep_range instead of udelay.
	- Rename config to LEDS_MT6370_FLASH.
	- Add missing ">" in copyright.
	- Change the Kconfig order

- In Patch 13/13:
	- Add support 'exponential mode' property parsing
	- Add 'return dev_err_probe()' after 'if (IS_ERR(priv->enable_gpio))'
	- Add 'mt6372' compatible string
	- Revise Kconfig help text
	- Revise update()/get() for supporting 16384 steps (MT6372)
	- Revise all shift usages form using 'ffs() and fls()' to defining the
	  _SHIFT macros.
	- Revise 'brightness ? 1 : 0' to '!!brightness' in gpiod_set_value()


Changes in v6:
- In Patch 03/13:
	- Add 'reg' property of led of multi-led to prevent checking
	  error.

- In Patch 08/13:
	- Convert tcpci as device resource managed with
	  'devm_add_action_or_reset' api.
	- Refine remvoe callback.
	- Refine the commit text from 'this commit add' to 'add'.

- In Patch 09/13:
	- Using 'struct device *dev = &pdev->dev' in probe()
	- Revise the sixth parameter of regmap_read_poll_timeout() by
	  Replacing '1000' with 'MILLI'
	- Revise the units of three macros
	- MT6370_AICR_400MA --> MT6370_AICR_400_mA
	- MT6370_ICHG_500MA --> MT6370_ICHG_500_mA
	- MT6370_ICHG_900MA --> MT6370_ICHG_900_mA

- In patch 10/13:
	- Remove the varable (*psy_desc) of struct mt6370_priv
	- Remove the deprecated usb type (POWER_SUPPLY_TYPE_USB_CDP and
	  POWER_SUPPLY_TYPE_USB_DCP)
	- Remove useless remove()
	- Revise all units from mini- to micro-
	- Revise get/set power_supply_prop (change to directly return get/set
	  regmap_field)
	- Revise probe() and use devm_add_action_or_reset() for handling of the
	  workqueue/delayed_work/mutex
	- Revise mt6370_chg_psy_desc
		- Add '.name = "mt6370-charger"'
		- Use 'static const'

- In patch 11/13:
	- Remove the 'ko' from mt6370 led Kconfig description.
	- Add both authors for Alice and ChiYuan.
	- Use pdata to distinguish the code from mt6370/71 to mt6372.
	- Instead of 'state' define, use the 'state' enum.
	- Fix the typo for 'MT6372_PMW_DUTY'.
	- For pwm_duty define, replace with bit macro - 1.
	- Refine all the labels from 'out' to 'out_unlock'.
	- Use struct 'dev' variable and 'dev_err_probe' to optimize the LOC.
	- Revise for the array initialization from {0} to {}.
	- Move into rgb folder and rename file name to 'leds-mt6370-rgb'.
	- Refine the 'comma' usage in struct/enum.

- In patch 12/13:
	- Use 'GENMASK' instead of 'BIT'.
	- Use dev_err_probe to decrease LOC.
	- Use 'dev' variable to make probe function more clean.
	- Refine the return of _mt6370_flash_brightness_set function.
	- Refine the descriptions.
	- Use mt6370_clamp() instead of clamp_align().
	- Use device resource managed API for v4l2 flash_release.


Changes in v5:
- In patch 07/13:
	- Add the comma in the last REGMAP_IRQ_REG_LINE(),
	  DEFINE_RES_IRQ_NAMED() and MFD_CELL_RES()
	- Add the prefix in the first parameter of all mfd_cell
	- Move enum and struct mt6370_info to mt6370.h
	- Remove struct device *dev in struct mt6370_info
	- Revise the description of Kconfig help text
	- Revise MODULE_DESCRIPTION()

- In patch 08/13:
	- Add comma for the last index of mt6370_reg_init.
	- Use dev_err_probe to decrease LOC.
	- Use 'dev' variable to make probe function more clean.
	- Refine kconfig text.
	- Remove both 'else' in set_vbus callback.
	- Remove comma for of_device_id if the assigned member is only one.

- In patch 09/13:
	- Replace using snprintf() with sysfs_emit() in mt6370_adc_read_label()
	- Remove macro ADC_CONV_TIME_US
	- Revise all variable ordering
	- Revise the description of Kconfig help text
	- Revise MODULE_DESCRIPTION()

- In patch 10/13:
	- Replace unsigned int type of pwr_rdy with bool in
	  mt6370_chg_set_online()
	- Remove redundant 'else' in mt6370_chg_field_get()
	- Revise 'if-else' in mt6370_chg_field_set()
	- Revise 'if' condition in mt6370_chg_enable_irq()
	- Revise all text 'otg' --> 'OTG'
	- Revise MT6370_MIVR_IBUS_TH_100_MA --> MT6370_MIVR_IBUS_TH_100_mA
	- Revise the description of Kconfig help text

- In patch 12/13:
	- Refine the coding style.
	- Use "dev" instead of "&pdev->dev".

- In patch 13/13:
	- Add missed <mod_devicetable.h>
	- Add struct device *dev in probe() to make code cleaning
	- Remove useless including header file <gpio/driver.h>, <of.h>
	- Remove useless variable uasage in mt6370_init_backlight_properties()
	- Remove redundant checking enable_gpio in mt6370_bl_update_status()
	- Remove redundant parentheses in mt6370_bl_get_brightness()
	- Revise the description of Kconfig help text
	- Revise the calculation of hys_th_steps


Changes in v4:
- In patch 02/13:
	- Add minItems of "io-channel-names"
	- Replace text "Mediatek" with "MediaTek"

- In patch 06/13:
	- Roll back all "$ref: " to v2 patch style (using "/schemas/...")

- In patch 07/13:
	- Replace text "Mediatek" with "MediaTek" in Kconfig
	- Replace "first break and then return" with "return directly"
	  in "mt6370_check_vendor_info()"
	- Add module name related description in Kconfig helptext
	- Add Copyright in the source code
	- Add header file "mt6370.h" for all "#define IRQ"
	- Adjust Makefile order of MT6370
	- Refine "bank_idx" and "bank_addr" in
	  "mt6375_regmap_read()" / "mt6375_regmap_write()"
	- Refine redundant "else if" in "mt6370_regmap_read()"

- In patch 08/13:
	- Replace text "Mediatek" with "MediaTek" in Kconfig
	- Replace "first ret=regulator_(dis/en)able and then return"
	  with "return directly" in "mt6370_tcpc_set_vbus()"
	- Replace header file <linux/of.h> with <linux/mod_devicetable.h>
	- Add Copyright in the source code
	- Add module name related description in Kconfig helptext
	- Remove header file <linux/of.h>
	- Refine all probe error by using dev_err_probe()

- In patch 09/13:
	- Replace text "Mediatek" with "MediaTek"
	- Replace all "first dev_err() and then return" with
	  "return dev_err_probe()"
	- Add Copyright in the source code
	- Add module name related description in Kconfig
	- Add unit suffix of macro "ADC_CONV_POLLING_TIME"
	- Add new macro "ADC_CONV_TIME_MS"
	- Adjust the position of include file <mediatek,mt6370_adc.h>
	- Adjust the postions between <linux/module.h> and
	   <linux/mod_devicetable.h>
	- Fix some incorrect characters

- In patch 10/13:
	- Replace text "Mediatek" with "MediaTek" in Kconfig and
	  MODULE_DESCRIPTION()
	- Replace "mt6370_chg_val_to_reg" and "mt6370_chg_reg_to_val"
	  with "linear_range" API
	- Replace "first break and then return" with "return directly"
	  in all cases of get/set power_supply_property
	- Replace all "first dev_err() and then return" with "return
	  dev_err_probe()"
	- Replace all "return IS_ERR(priv->rdev) ? PTR_ERR(priv->rdev) : 0"
	  with "PTR_ERR_OR_ZERO()"
	- Replace "priv->dev->of_node" with "dev_of_node()"
	- Add Copyright in the source code
	- Add module name related description in Kconfig helptext
	- Add proper unit of "MT6370_MIVR_IBUS_TH"
	- Add error check in "mt6370_chg_get_status"
	- Remove including <mediatek,mt6370_adc.h> header file
	- Remove redundant comma of every enum terminator line
	- Remove unwanted blank lines
	- Remove the useless label (toggle_cfo_exit:)
	- Remove using atomic
	- Remove using of_match_ptr()
	- Fix some incorrect characters
	- Fix updating wrong bits when using ena_gpiod of OTG regulator
	- Adjust the probe order in probe()

- In patch 11/13:
	- Replace text "Mediatek" with "MediaTek" in Kconfig
	- Replace text "const" with "constant" in Kconfig
	- Add Copyright in the source code

- In patch 12/13:
	- Replace text "Mediatek" with "MediaTek" in Kconfig
	- Add Copyright in the source code

- In patch 13/13:
	- Replace text "Mediatek" with "MediaTek" in Kconfig
	- Add Copyright in the source code
	- Revise the comment of "PWM HYS STEPS"


Changes in v3:
- Remove ADC ABI file, which is added in v2 Patch 7
- In patch 02/14:
	- Add items and remove maxItems of io-channels
	- Add io-channel-names and describe each item
	- Add "unevaluatedProperties: false" in "usb-otg-vbus-regulator"
	- Rename "enable-gpio" to "enable-gpios" in "usb-otg-vbus-regulator"

- In patch 03/14:
	- Use leds-class-multicolor.yaml instead of common.yaml.
	- Split multi-led and led node.
	- Add subdevice "led" in "multi-led".

- In patch 04/14:
	- Remove the description of enum.

- In patch 05/14:
	- Rename "mediatek,bled-pwm-hys-input-threshold-steps" to
	  "mediatek,bled-pwm-hys-input-th-steps"
	- Refine "bled-pwm-hys-input-th-steps", "bled-ovp-microvolt",
	  "bled-ocp-microamp" enum values

- In patch 06/14:
	- Use " in entire patchset
	- Refine ADC description
	- Rename "enable-gpio" to "enable-gpios" in "regualtor"

- In patch 07/14:
	- Refine Kconfig help text
	- Refine error message of unknown vendor ID in
	  mt6370_check_vendor_info()
	- Refine return value handling of mt6370_regmap_read()
	- Refine all probe error by using dev_err_probe()
	- Refine "bank_idx" and "bank_addr" in mt6370_regmap_read() and
	  mt6370_regmap_write()
	- Add "#define VENID*" and drop the comments in
	  mt6370_check_vendor_info()
	- Drop "MFD" in MODULE_DESCRIPTION()

- In patch 09/14:
	- Refine Kconfig help text

- In patch 10/14:
	- Refine Kconfig help text
	- Refine all channel value in read_scale()
		a. current: uA --> mA
		b. voltage: uV --> mV
		c. temperature: degrees Celsius --> milli degrees Celsius
	- Add "default:" condition of switch statement in read_scale() and read_raw()
	- Add error message for reading ADC register failed
	- Add the comment for adc_lock
	- Add <linux/mod_devicetable.h> header file for struct of_device_id
	- Replace "adc" text with "ADC" in all of the error messages

- In patch 12/14:
	- Refine the grammer of the Kconfig.
	- Change reg mode to the const current mode.

- In patch 14/14:
	- Refine bool properties parsing (pwm-enable, ovp-shutdown, ocp-shutdown) in DT
	  parsing function
	- Refine u32 and u8 properties parsing (pwm-hys-input-th-steps, ovp-microvolt,
	  ocp-microamp), from using register value to using actual value
	- Refine error string of "channle-use" parsing failed
	- Refine Kconfig help text


Changes in v2:
- In patch 01/15:
	- Add "unevaluatedProperties: false".
	- Delete "DT bindings".
	- Refine the description to fit in 80 columns.
	- Skip the connector description.

- In patch 02/15:
	- Refine items description of interrupt-name
	- Rename "usb-otg-vbus" to "usb-otg-vbus-regulator"
	- Add constraint properties for ADC

- In patch 03/15:
	- Skip not useful description of "^(multi-)?led@[0-3]$"
	  and reg.
	- Due to the dependency, remove the mention of mfd
	  document directory.
	- Delete Soft-start property. In design aspect, we think
	  soft-restart should always be enabled, our new chip
	  has deleted the related setting register , also, we don’t
	  allow user adjust this parameter in this chip.
	- Refine the commit message.

- In patch 04/15:
	- Skip not useful description of "^led@[0-1]$" and reg.
	- Add apace after '#'.
	- Refine the commit message.

- In patch 05/15:
	- Remove "binding documentation" in subject title
	- Refine description of mt6370 backlight binding
	  document
	- Refine properties name(bled-pwm-hys-input-bit,
	  bled-ovp-microvolt, bled-ocp-microamp) and their
	  description

- In patch 06/15:
	- Refine ADC and Regulator descriptions
	- Refine include header usage in example
	- Refine node name to generic node name("pmic@34")
	- Refine led example indentation
	- Refine license of mediatek,mt6370_adc.h
	- Rename the dts example from IRQ define to number.
	- Remove mediatek,mt6370.h

- In patch 07/15:
	- Add ABI documentation for mt6370 non-standard ADC
	  sysfs interfaces.

- In patch 08/15:
	- Add all IRQ define into mt6370.c.
	- Refine include header usage

- In patch 09/15:
	- No changes.

- In patch 10/15:
	- Use 'gpiod_get_from_of_node' to replace
	  'fwnode_gpiod_get_index'.

- In patch 11/15:
	- Refine Kconfig mt6370 help text
	- Refine mask&shift to FIELD_PREP()
	- Refine mutex lock name ("lock" -> "adc_lock")
	- Refine mt6370_adc_read_scale()
	- Refine mt6370_adc_read_offset()
	- Refine mt6370_channel_labels[] by using enum to index
	  chan spec
	- Refine MT6370_ADC_CHAN()
	- Refine indio_dev->name
	- Remove useless include header files

- In patch 12/15:
	- Refine mt6370_chg_otg_rdesc.of_match
	  ("mt6370,otg-vbus" -> "usb-otg-vbus-regulator") to match
	  DT binding

- In patch 13/15:
	- Refine Kconfig description.
	- Remove include "linux/of.h" and use
	  "linux/mod_devicetable.h".
	- Place a comma for the last element of the const
	  unsigned int array.
	- Add a comment line for the mutex 'lock'.
	- In probe function, use 'dev_err_probe' in some
	  judgement to reduce the LOC.
	- Refine include header usage.
	  BIT/GENMASK -> linux/bits.h
	  FIELD_GET -> linux/bitfield.h

- In patch 14/15:
	- Add blank line.
	- Replace container_of() with to_mt6370_led() .
	- Refine description of ramping.
	- Refine the mt6370_init_common_properties function.
	- Refine the probe return.

- In patch 15/15:
	- Refine MT6370 help text in Kconfig
	- Refine DT Parse function
	- Remove useless enum
	- Add comment for 6372 backward compatible in
	  bl_update_status() and
	  check_vendor_info()
	- Using dev_err_probe(); insteads dev_err()&return; in
	  the probe()


Alice Chen (2):
  dt-bindings: leds: Add MediaTek MT6370 flashlight
  leds: flash: mt6370: Add MediaTek MT6370 flashlight support

ChiYuan Huang (7):
  dt-bindings: usb: Add MediaTek MT6370 TCPC
  dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED
    indicator
  dt-bindings: backlight: Add MediaTek MT6370 backlight
  dt-bindings: mfd: Add MediaTek MT6370
  mfd: mt6370: Add MediaTek MT6370 support
  usb: typec: tcpci_mt6370: Add MediaTek MT6370 tcpci driver
  leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator
    support

ChiaEn Wu (4):
  dt-bindings: power: supply: Add MediaTek MT6370 Charger
  iio: adc: mt6370: Add MediaTek MT6370 support
  power: supply: mt6370: Add MediaTek MT6370 charger driver
  video: backlight: mt6370: Add MediaTek MT6370 support

 .../leds/backlight/mediatek,mt6370-backlight.yaml  |  121 +++
 .../bindings/leds/mediatek,mt6370-flashlight.yaml  |   41 +
 .../bindings/leds/mediatek,mt6370-indicator.yaml   |   81 ++
 .../devicetree/bindings/mfd/mediatek,mt6370.yaml   |  280 ++++++
 .../power/supply/mediatek,mt6370-charger.yaml      |   88 ++
 .../bindings/usb/mediatek,mt6370-tcpc.yaml         |   36 +
 drivers/iio/adc/Kconfig                            |   12 +
 drivers/iio/adc/Makefile                           |    1 +
 drivers/iio/adc/mt6370-adc.c                       |  305 ++++++
 drivers/leds/flash/Kconfig                         |   12 +
 drivers/leds/flash/Makefile                        |    1 +
 drivers/leds/flash/leds-mt6370-flash.c             |  632 ++++++++++++
 drivers/leds/rgb/Kconfig                           |   13 +
 drivers/leds/rgb/Makefile                          |    1 +
 drivers/leds/rgb/leds-mt6370-rgb.c                 | 1022 ++++++++++++++++++++
 drivers/mfd/Kconfig                                |   16 +
 drivers/mfd/Makefile                               |    1 +
 drivers/mfd/mt6370.c                               |  312 ++++++
 drivers/mfd/mt6370.h                               |   99 ++
 drivers/power/supply/Kconfig                       |   14 +
 drivers/power/supply/Makefile                      |    1 +
 drivers/power/supply/mt6370-charger.c              |  965 ++++++++++++++++++
 drivers/usb/typec/tcpm/Kconfig                     |   11 +
 drivers/usb/typec/tcpm/Makefile                    |    1 +
 drivers/usb/typec/tcpm/tcpci_mt6370.c              |  207 ++++
 drivers/video/backlight/Kconfig                    |   13 +
 drivers/video/backlight/Makefile                   |    1 +
 drivers/video/backlight/mt6370-backlight.c         |  351 +++++++
 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h  |   18 +
 29 files changed, 4656 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
 create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-flashlight.yaml
 create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
 create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
 create mode 100644 Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
 create mode 100644 Documentation/devicetree/bindings/usb/mediatek,mt6370-tcpc.yaml
 create mode 100644 drivers/iio/adc/mt6370-adc.c
 create mode 100644 drivers/leds/flash/leds-mt6370-flash.c
 create mode 100644 drivers/leds/rgb/leds-mt6370-rgb.c
 create mode 100644 drivers/mfd/mt6370.c
 create mode 100644 drivers/mfd/mt6370.h
 create mode 100644 drivers/power/supply/mt6370-charger.c
 create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c
 create mode 100644 drivers/video/backlight/mt6370-backlight.c
 create mode 100644 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h

-- 
2.7.4

[PATCH v7 01/13] dt-bindings: usb: Add MediaTek MT6370 TCPC

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

Add MediaTek MT6370 TCPC binding documentation.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 .../bindings/usb/mediatek,mt6370-tcpc.yaml         | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/mediatek,mt6370-tcpc.yaml

diff --git a/Documentation/devicetree/bindings/usb/mediatek,mt6370-tcpc.yaml b/Documentation/devicetree/bindings/usb/mediatek,mt6370-tcpc.yaml
new file mode 100644
index 0000000..72f56cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/mediatek,mt6370-tcpc.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/usb/mediatek,mt6370-tcpc.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: MediatTek MT6370 Type-C Port Switch and Power Delivery controller
+
+maintainers:
+  - ChiYuan Huang <cy_huang@richtek.com>
+
+description: |
+  MediaTek MT6370 is a multi-functional device.
+  It integrates charger, ADC, flash, RGB indicators,
+  regulators (DSV/VIBLDO), and TypeC Port Switch with Power Delivery controller.
+  This document only describes MT6370 Type-C Port Switch and
+  Power Delivery controller.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt6370-tcpc
+
+  interrupts:
+    maxItems: 1
+
+  connector:
+    type: object
+    $ref: /schemas/connector/usb-connector.yaml#
+    unevaluatedProperties: false
+
+additionalProperties: false
+
+required:
+  - compatible
+  - interrupts
-- 
2.7.4

[PATCH v7 02/13] dt-bindings: power: supply: Add MediaTek MT6370 Charger

[ChiaEn Wu]

From: ChiaEn Wu <chiaen_wu@richtek.com>

Add MediaTek MT6370 Charger binding documentation.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 .../power/supply/mediatek,mt6370-charger.yaml      | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml

diff --git a/Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml b/Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
new file mode 100644
index 0000000..bd09a0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/mediatek,mt6370-charger.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/mediatek,mt6370-charger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6370 Battery Charger
+
+maintainers:
+  - ChiaEn Wu <chiaen_wu@richtek.com>
+
+description: |
+  This module is part of the MT6370 MFD device.
+  Provides Battery Charger, Boost for OTG devices and BC1.2 detection.
+
+properties:
+  compatible:
+    const: mediatek,mt6370-charger
+
+  interrupts:
+    description: |
+      Specify what irqs are needed to be handled by MT6370 Charger driver. IRQ
+      "MT6370_IRQ_CHG_MIVR", "MT6370_IRQ_ATTACH" and "MT6370_IRQ_OVPCTRL_UVP_D"
+      are required.
+    items:
+      - description: BC1.2 done irq
+      - description: usb plug in irq
+      - description: mivr irq
+
+  interrupt-names:
+    items:
+      - const: attach_i
+      - const: uvp_d_evt
+      - const: mivr
+
+  io-channels:
+    description: |
+      Use ADC channel to read VBUS, IBUS, IBAT, etc., info.
+    minItems: 1
+    items:
+      - description: |
+          VBUS voltage with lower accuracy (+-75mV) but higher measure
+          range (1~22V)
+      - description: |
+          VBUS voltage with higher accuracy (+-30mV) but lower measure
+          range (1~9.76V)
+      - description: the main system input voltage
+      - description: battery voltage
+      - description: battery temperature-sense input voltage
+      - description: IBUS current (required)
+      - description: battery current
+      - description: |
+          regulated output voltage to supply for the PWM low-side gate driver
+          and the bootstrap capacitor
+      - description: IC junction temperature
+
+  io-channel-names:
+    minItems: 1
+    items:
+      - const: vbusdiv5
+      - const: vbusdiv2
+      - const: vsys
+      - const: vbat
+      - const: ts_bat
+      - const: ibus
+      - const: ibat
+      - const: chg_vddp
+      - const: temp_jc
+
+  usb-otg-vbus-regulator:
+    type: object
+    description: OTG boost regulator.
+    unevaluatedProperties: false
+    $ref: /schemas/regulator/regulator.yaml#
+
+    properties:
+      enable-gpios:
+        maxItems: 1
+
+required:
+  - compatible
+  - interrupts
+  - interrupt-names
+  - io-channels
+
+additionalProperties: false
+
+...
-- 
2.7.4

[PATCH v7 03/13] dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED indicator

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

Add MediaTek MT6370 current sink type LED indicator binding documentation.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 .../bindings/leds/mediatek,mt6370-indicator.yaml   | 81 ++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml

diff --git a/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml b/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
new file mode 100644
index 0000000..204b103
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/mediatek,mt6370-indicator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LED driver for MT6370 PMIC from MediaTek Integrated.
+
+maintainers:
+  - Alice Chen <alice_chen@richtek.com>
+
+description: |
+  This module is part of the MT6370 MFD device.
+  Add MT6370 LED driver include 4-channel RGB LED support Register/PWM/Breath Mode
+
+allOf:
+  - $ref: leds-class-multicolor.yaml#
+
+properties:
+  compatible:
+    const: mediatek,mt6370-indicator
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^multi-led@[0-3]$":
+    type: object
+
+    properties:
+      reg:
+        enum: [0, 1, 2, 3]
+
+      "#address-cells":
+        const: 1
+
+      "#size-cells":
+        const: 0
+
+    patternProperties:
+      "^led@[0-2]$":
+        type: object
+        $ref: common.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          reg:
+            enum: [0, 1, 2]
+
+        required:
+          - reg
+          - color
+
+    required:
+      - reg
+      - color
+      - "#address-cells"
+      - "#size-cells"
+
+  "^led@[0-3]$":
+    type: object
+    $ref: common.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        enum: [0, 1, 2, 3]
+
+    required:
+      - reg
+      - color
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
-- 
2.7.4

[PATCH v7 04/13] dt-bindings: leds: Add MediaTek MT6370 flashlight

[ChiaEn Wu]

From: Alice Chen <alice_chen@richtek.com>

Add MediaTek MT6370 flashlight binding documentation.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Alice Chen <alice_chen@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 .../bindings/leds/mediatek,mt6370-flashlight.yaml  | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-flashlight.yaml

diff --git a/Documentation/devicetree/bindings/leds/mediatek,mt6370-flashlight.yaml b/Documentation/devicetree/bindings/leds/mediatek,mt6370-flashlight.yaml
new file mode 100644
index 0000000..e9d02ed
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/mediatek,mt6370-flashlight.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/mediatek,mt6370-flashlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Flash LED driver for MT6370 PMIC from MediaTek Integrated.
+
+maintainers:
+  - Alice Chen <alice_chen@richtek.com>
+
+description: |
+  This module is part of the MT6370 MFD device.
+  Add MT6370 flash LED driver include 2-channel flash LED support Torch/Strobe Mode.
+
+properties:
+  compatible:
+    const: mediatek,mt6370-flashlight
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^led@[0-1]$":
+    type: object
+    $ref: common.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        enum: [0, 1]
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
-- 
2.7.4

[PATCH v7 05/13] dt-bindings: backlight: Add MediaTek MT6370 backlight

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

Add MT6370 backlight binding documentation.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Add the second compatible string for 'mt6372'
- Add 'mediatek,bled-exponential-mode-enable' property for enable the
  exponential mode of backlight brightness
- Add validation for the maximum value of 'default-brightness' and
  'max-brightness'
---
 .../leds/backlight/mediatek,mt6370-backlight.yaml  | 121 +++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml

diff --git a/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
new file mode 100644
index 0000000..5533b65
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6370 Backlight
+
+maintainers:
+  - ChiaEn Wu <chiaen_wu@richtek.com>
+
+description: |
+  This module is part of the MT6370 MFD device.
+  The MT6370 Backlight WLED driver supports up to a 29V output voltage for
+  4 channels of 8 series WLEDs. Each channel supports up to 30mA of current
+  capability with 2048 current steps (11 bits, only for MT6370/MT6371) or
+  16384 current steps (14 bits, only for MT6372) in exponential or linear
+  mapping curves.
+
+allOf:
+  - $ref: common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt6370-backlight
+      - mediatek,mt6372-backlight
+
+  default-brightness:
+    minimum: 0
+
+  max-brightness:
+    minimum: 0
+
+  enable-gpios:
+    description: External backlight 'enable' pin
+    maxItems: 1
+
+  mediatek,bled-pwm-enable:
+    description: |
+      Enable external PWM input for backlight dimming
+    type: boolean
+
+  mediatek,bled-pwm-hys-enable:
+    description: |
+      Enable the backlight input-hysteresis for PWM mode
+    type: boolean
+
+  mediatek,bled-pwm-hys-input-th-steps:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [1, 4, 16, 64]
+    description: |
+      The selection of the upper and lower bounds threshold of backlight
+      PWM resolution. If we choose selection 64, the variation of PWM
+      resolution needs more than 64 steps.
+
+  mediatek,bled-ovp-shutdown:
+    description: |
+      Enable the backlight shutdown when OVP level triggered
+    type: boolean
+
+  mediatek,bled-ovp-microvolt:
+    enum: [17000000, 21000000, 25000000, 29000000]
+    description: |
+      Backlight OVP level selection.
+
+  mediatek,bled-ocp-shutdown:
+    description: |
+      Enable the backlight shutdown when OCP level triggerred.
+    type: boolean
+
+  mediatek,bled-ocp-microamp:
+    enum: [900000, 1200000, 1500000, 1800000]
+    description: |
+      Backlight OC level selection.
+
+  mediatek,bled-exponential-mode-enable:
+    description: |
+      Enable the exponential mode of backlight brightness. If this property
+      is not enabled, the default is to use linear mode.
+    type: boolean
+
+  mediatek,bled-channel-use:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    description: |
+      Backlight LED channel to be used.
+      Each bit mapping to:
+        - 0: CH4
+        - 1: CH3
+        - 2: CH2
+        - 3: CH1
+    minimum: 1
+    maximum: 15
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: mediatek,mt6372-backlight
+
+then:
+  properties:
+    default-brightness:
+      maximum: 16384
+
+    max-brightness:
+      maximum: 16384
+
+else:
+  properties:
+    default-brightness:
+      maximum: 2048
+
+    max-brightness:
+      maximum: 2048
+
+required:
+  - compatible
+  - mediatek,bled-channel-use
+
+additionalProperties: false
-- 
2.7.4

[PATCH v7 06/13] dt-bindings: mfd: Add MediaTek MT6370

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

Add MediaTek MT6370 binding documentation.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 .../devicetree/bindings/mfd/mediatek,mt6370.yaml   | 280 +++++++++++++++++++++
 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h  |  18 ++
 2 files changed, 298 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
 create mode 100644 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h

diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml b/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
new file mode 100644
index 0000000..410e2d4
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
@@ -0,0 +1,280 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/mediatek,mt6370.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6370 SubPMIC
+
+maintainers:
+  - ChiYuan Huang <cy_huang@richtek.com>
+
+description: |
+  MT6370 is a highly-integrated smart power management IC, which includes a
+  single cell Li-Ion/Li-Polymer switching battery charger, a USB Type-C &
+  Power Delivery (PD) controller, dual flash LED current sources, a RGB LED
+  driver, a backlight WLED driver, a display bias driver and a general LDO for
+  portable devices.
+
+properties:
+  compatible:
+    const: mediatek,mt6370
+
+  reg:
+    maxItems: 1
+
+  wakeup-source: true
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+
+  adc:
+    type: object
+    description: |
+      Provides 9 channels for system monitoring, including VBUSDIV5 (lower
+      accuracy, higher measure range), VBUSDIV2 (higher accuracy, lower
+      measure range), VBAT, VSYS, CHG_VDDP, TS_BAT, IBUS, IBAT, and TEMP_JC.
+
+    properties:
+      compatible:
+        const: mediatek,mt6370-adc
+
+      "#io-channel-cells":
+        const: 1
+
+    required:
+      - compatible
+      - "#io-channel-cells"
+
+  backlight:
+    type: object
+    $ref: /schemas/leds/backlight/mediatek,mt6370-backlight.yaml#
+
+  charger:
+    type: object
+    $ref: /schemas/power/supply/mediatek,mt6370-charger.yaml#
+
+  tcpc:
+    type: object
+    $ref: /schemas/usb/mediatek,mt6370-tcpc.yaml#
+
+  indicator:
+    type: object
+    $ref: /schemas/leds/mediatek,mt6370-indicator.yaml#
+
+  flashlight:
+    type: object
+    $ref: /schemas/leds/mediatek,mt6370-flashlight.yaml#
+
+  regulators:
+    type: object
+    description: |
+      List all supported regulators, which support the control for DisplayBias
+      voltages and one general purpose LDO which commonly used to drive the
+      vibrator.
+
+    patternProperties:
+      "^(dsvbst|vibldo)$":
+        $ref: /schemas/regulator/regulator.yaml#
+        type: object
+        unevaluatedProperties: false
+
+      "^(dsvpos|dsvneg)$":
+        $ref: /schemas/regulator/regulator.yaml#
+        type: object
+        unevaluatedProperties: false
+
+        properties:
+          enable-gpios:
+            maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-controller
+  - "#interrupt-cells"
+  - regulators
+  - adc
+  - backlight
+  - indicator
+  - tcpc
+  - charger
+  - flashlight
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/leds/common.h>
+    #include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
+    #include <dt-bindings/usb/pd.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+        pmic@34 {
+        compatible = "mediatek,mt6370";
+        reg = <0x34>;
+        wakeup-source;
+        interrupts-extended = <&gpio26 3 IRQ_TYPE_LEVEL_LOW>;
+        interrupt-controller;
+        #interrupt-cells = <1>;
+
+        mt6370_adc: adc {
+          compatible = "mediatek,mt6370-adc";
+          #io-channel-cells = <1>;
+        };
+
+        backlight {
+          compatible = "mediatek,mt6370-backlight";
+          mediatek,bled-channel-use = /bits/ 8 <15>;
+        };
+
+        charger {
+          compatible = "mediatek,mt6370-charger";
+          interrupts = <48>, <68>, <6>;
+          interrupt-names = "attach_i", "uvp_d_evt", "mivr";
+          io-channels = <&mt6370_adc MT6370_CHAN_IBUS>;
+
+          mt6370_otg_vbus: usb-otg-vbus-regulator {
+            regulator-name = "mt6370-usb-otg-vbus";
+            regulator-min-microvolt = <4350000>;
+            regulator-max-microvolt = <5800000>;
+            regulator-min-microamp = <500000>;
+            regulator-max-microamp = <3000000>;
+          };
+        };
+
+        indicator {
+          compatible = "mediatek,mt6370-indicator";
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          multi-led@0 {
+            reg = <0>;
+            function = LED_FUNCTION_INDICATOR;
+            color = <LED_COLOR_ID_RGB>;
+            led-max-microamp = <24000>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            led@0 {
+              reg = <0>;
+              color = <LED_COLOR_ID_RED>;
+            };
+            led@1 {
+              reg = <1>;
+              color = <LED_COLOR_ID_GREEN>;
+            };
+            led@2 {
+              reg = <2>;
+              color = <LED_COLOR_ID_BLUE>;
+            };
+          };
+          led@3 {
+            reg = <3>;
+            function = LED_FUNCTION_INDICATOR;
+            color = <LED_COLOR_ID_WHITE>;
+            led-max-microamp = <6000>;
+          };
+        };
+
+        flashlight {
+          compatible = "mediatek,mt6370-flashlight";
+          #address-cells = <1>;
+          #size-cells = <0>;
+          led@0 {
+            reg = <0>;
+            led-sources = <0>;
+            function = LED_FUNCTION_FLASH;
+            color = <LED_COLOR_ID_WHITE>;
+            function-enumerator = <1>;
+            led-max-microamp = <200000>;
+            flash-max-microamp = <500000>;
+            flash-max-timeout-us = <1248000>;
+          };
+          led@1 {
+            reg = <1>;
+            led-sources = <1>;
+            function = LED_FUNCTION_FLASH;
+            color = <LED_COLOR_ID_WHITE>;
+            function-enumerator = <2>;
+            led-max-microamp = <200000>;
+            flash-max-microamp = <500000>;
+            flash-max-timeout-us = <1248000>;
+          };
+        };
+
+        tcpc {
+          compatible = "mediatek,mt6370-tcpc";
+          interrupts-extended = <&gpio26 4 IRQ_TYPE_LEVEL_LOW>;
+
+          connector {
+            compatible = "usb-c-connector";
+            label = "USB-C";
+            vbus-supply = <&mt6370_otg_vbus>;
+            data-role = "dual";
+            power-role = "dual";
+            try-power-role = "sink";
+            source-pdos = <PDO_FIXED(5000, 1000, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP)>;
+            sink-pdos = <PDO_FIXED(5000, 2000, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP)>;
+            op-sink-microwatt = <10000000>;
+
+            ports {
+              #address-cells = <1>;
+              #size-cells = <0>;
+
+              port@0 {
+                reg = <0>;
+                endpoint {
+                  remote-endpoint = <&usb_hs>;
+                };
+              };
+              port@1 {
+                reg = <1>;
+                endpoint {
+                  remote-endpoint = <&usb_ss>;
+                };
+              };
+              port@2 {
+                reg = <2>;
+                endpoint {
+                  remote-endpoint = <&dp_aux>;
+                };
+              };
+            };
+          };
+        };
+
+        regulators {
+          dsvbst {
+            regulator-name = "mt6370-dsv-vbst";
+            regulator-min-microvolt = <4000000>;
+            regulator-max-microvolt = <6200000>;
+          };
+          dsvpos {
+            regulator-name = "mt6370-dsv-vpos";
+            regulator-min-microvolt = <4000000>;
+            regulator-max-microvolt = <6000000>;
+            regulator-boot-on;
+          };
+          dsvneg {
+            regulator-name = "mt6370-dsv-vneg";
+            regulator-min-microvolt = <4000000>;
+            regulator-max-microvolt = <6000000>;
+            regulator-boot-on;
+          };
+          vibldo {
+            regulator-name = "mt6370-vib-ldo";
+            regulator-min-microvolt = <1600000>;
+            regulator-max-microvolt = <4000000>;
+          };
+        };
+      };
+    };
diff --git a/include/dt-bindings/iio/adc/mediatek,mt6370_adc.h b/include/dt-bindings/iio/adc/mediatek,mt6370_adc.h
new file mode 100644
index 0000000..6ee7255
--- /dev/null
+++ b/include/dt-bindings/iio/adc/mediatek,mt6370_adc.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+
+#ifndef __DT_BINDINGS_MEDIATEK_MT6370_ADC_H__
+#define __DT_BINDINGS_MEDIATEK_MT6370_ADC_H__
+
+/* ADC Channel Index */
+#define MT6370_CHAN_VBUSDIV5	0
+#define MT6370_CHAN_VBUSDIV2	1
+#define MT6370_CHAN_VSYS	2
+#define MT6370_CHAN_VBAT	3
+#define MT6370_CHAN_TS_BAT	4
+#define MT6370_CHAN_IBUS	5
+#define MT6370_CHAN_IBAT	6
+#define MT6370_CHAN_CHG_VDDP	7
+#define MT6370_CHAN_TEMP_JC	8
+#define MT6370_CHAN_MAX		9
+
+#endif
-- 
2.7.4

[PATCH v7 07/13] mfd: mt6370: Add MediaTek MT6370 support

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

This adds support for the MediaTek MT6370 SubPMIC. MediaTek MT6370 is a
SubPMIC consisting of a single cell battery charger with ADC monitoring,
RGB LEDs, dual channel flashlight, WLED backlight driver, display bias
voltage supply, one general purpose LDO, and the USB Type-C & PD controller
complies with the latest USB Type-C and PD standards.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Move '#define MT6370_REG_MAXADDR' to the next line of
  '#define MT6370_REG_CHG_MASK1'
- Rename 'MT6370_REG_ADDRLEN' to 'MT6370_MAX_ADDRLEN'
---
 drivers/mfd/Kconfig  |  16 +++
 drivers/mfd/Makefile |   1 +
 drivers/mfd/mt6370.c | 312 +++++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/mfd/mt6370.h |  99 ++++++++++++++++
 4 files changed, 428 insertions(+)
 create mode 100644 drivers/mfd/mt6370.c
 create mode 100644 drivers/mfd/mt6370.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 9566341..0666bda 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -938,6 +938,22 @@ config MFD_MT6360
 	  PMIC part includes 2-channel BUCKs and 2-channel LDOs
 	  LDO part includes 4-channel LDOs
 
+config MFD_MT6370
+	tristate "MediaTek MT6370 SubPMIC"
+	select MFD_CORE
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	depends on I2C
+	help
+	  Say Y here to enable MT6370 SubPMIC functional support.
+	  It consists of a single cell battery charger with ADC monitoring, RGB
+	  LEDs, dual channel flashlight, WLED backlight driver, display bias
+	  voltage supply, one general purpose LDO, and the USB Type-C & PD
+	  controller complies with the latest USB Type-C and PD standards.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "mt6370".
+
 config MFD_MT6397
 	tristate "MediaTek MT6397 PMIC Support"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 8c69867..81dbed3 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -173,6 +173,7 @@ obj-$(CONFIG_MFD_MAX8998)	+= max8998.o max8998-irq.o
 obj-$(CONFIG_MFD_MP2629)	+= mp2629.o
 
 obj-$(CONFIG_MFD_MT6360)	+= mt6360-core.o
+obj-$(CONFIG_MFD_MT6370)	+= mt6370.o
 mt6397-objs			:= mt6397-core.o mt6397-irq.o mt6358-irq.o
 obj-$(CONFIG_MFD_MT6397)	+= mt6397.o
 
diff --git a/drivers/mfd/mt6370.c b/drivers/mfd/mt6370.c
new file mode 100644
index 0000000..cf19cce
--- /dev/null
+++ b/drivers/mfd/mt6370.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "mt6370.h"
+
+#define MT6370_REG_DEV_INFO	0x100
+#define MT6370_REG_CHG_IRQ1	0x1C0
+#define MT6370_REG_CHG_MASK1	0x1E0
+#define MT6370_REG_MAXADDR	0x1FF
+
+#define MT6370_VENID_MASK	GENMASK(7, 4)
+
+#define MT6370_NUM_IRQREGS	16
+#define MT6370_USBC_I2CADDR	0x4E
+#define MT6370_MAX_ADDRLEN	2
+
+#define MT6370_VENID_RT5081	0x8
+#define MT6370_VENID_RT5081A	0xA
+#define MT6370_VENID_MT6370	0xE
+#define MT6370_VENID_MT6371	0xF
+#define MT6370_VENID_MT6372P	0x9
+#define MT6370_VENID_MT6372CP	0xB
+
+static const struct regmap_irq mt6370_irqs[] = {
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHGON, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TREG, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_AICR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_MIVR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_PWR_RDY, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FL_CHG_VINOVP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSUV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSOV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VBATOV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VINOVPCHG, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COLD, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COOL, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_WARM, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_HOT, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_STATC, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_FAULT, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_STATC, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TMR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_BATABS, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ADPBAD, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RVP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_TSHUTDOWN, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IINMEAS, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ICCMEAS, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET_DONE, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_WDTMR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_SSFINISH, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RECHG, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TERM, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IEOC, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_ADC_DONE, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_PUMPX_DONE, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_BATUV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_MIDOV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_OLP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_ATTACH, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DETACH, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_STPDONE, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_VBUSDET_DONE, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_DET, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DCDT, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_VGOK, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_WDTMR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_UC, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OC, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_SWON, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP_D, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP_D, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_STRBPIN, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TORPIN, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TX, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_LVF, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_SHORT, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_SHORT, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_STRB, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB, 8),
+	REGMAP_IRQ_REG_LINE(mT6370_IRQ_FLED2_STRB_TO, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB_TO, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_TOR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_TOR, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_OTP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_OVP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_UV, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_LDO_OC, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OCP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OVP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_OCP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_OCP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_BST_OCP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_SCP, 8),
+	REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_SCP, 8),
+};
+
+static const struct regmap_irq_chip mt6370_irq_chip = {
+	.name		= "mt6370-irqs",
+	.status_base	= MT6370_REG_CHG_IRQ1,
+	.mask_base	= MT6370_REG_CHG_MASK1,
+	.num_regs	= MT6370_NUM_IRQREGS,
+	.irqs		= mt6370_irqs,
+	.num_irqs	= ARRAY_SIZE(mt6370_irqs),
+};
+
+static const struct resource mt6370_regulator_irqs[] = {
+	DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_SCP, "db_vpos_scp"),
+	DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_SCP, "db_vneg_scp"),
+	DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_BST_OCP, "db_vbst_ocp"),
+	DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_OCP, "db_vpos_ocp"),
+	DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_OCP, "db_vneg_ocp"),
+	DEFINE_RES_IRQ_NAMED(MT6370_IRQ_LDO_OC, "ldo_oc"),
+};
+
+static const struct mfd_cell mt6370_devices[] = {
+	MFD_CELL_OF("mt6370-adc",
+		    NULL, NULL, 0, 0, "mediatek,mt6370-adc"),
+	MFD_CELL_OF("mt6370-charger",
+		    NULL, NULL, 0, 0, "mediatek,mt6370-charger"),
+	MFD_CELL_OF("mt6370-flashlight",
+		    NULL, NULL, 0, 0, "mediatek,mt6370-flashlight"),
+	MFD_CELL_OF("mt6370-indicator",
+		    NULL, NULL, 0, 0, "mediatek,mt6370-indicator"),
+	MFD_CELL_OF("mt6370-tcpc",
+		    NULL, NULL, 0, 0, "mediatek,mt6370-tcpc"),
+	MFD_CELL_RES("mt6370-regulator", mt6370_regulator_irqs),
+};
+
+static const struct mfd_cell mt6370_exclusive_devices[] = {
+	MFD_CELL_OF("mt6370-backlight",
+		    NULL, NULL, 0, 0, "mediatek,mt6370-backlight"),
+};
+
+static const struct mfd_cell mt6372_exclusive_devices[] = {
+	MFD_CELL_OF("mt6370-backlight",
+		    NULL, NULL, 0, 0, "mediatek,mt6372-backlight"),
+};
+
+static int mt6370_check_vendor_info(struct device *dev, struct regmap *rmap,
+				    int *vid)
+{
+	unsigned int devinfo;
+	int ret;
+
+	ret = regmap_read(rmap, MT6370_REG_DEV_INFO, &devinfo);
+	if (ret)
+		return ret;
+
+	*vid = FIELD_GET(MT6370_VENID_MASK, devinfo);
+	switch (*vid) {
+	case MT6370_VENID_RT5081:
+	case MT6370_VENID_RT5081A:
+	case MT6370_VENID_MT6370:
+	case MT6370_VENID_MT6371:
+	case MT6370_VENID_MT6372P:
+	case MT6370_VENID_MT6372CP:
+		return 0;
+	default:
+		dev_err(dev, "Unknown Vendor ID 0x%02x\n", devinfo);
+		return -ENODEV;
+	}
+}
+
+static int mt6370_regmap_read(void *context, const void *reg_buf,
+			      size_t reg_size, void *val_buf, size_t val_size)
+{
+	struct mt6370_info *info = context;
+	const u8 *u8_buf = reg_buf;
+	u8 bank_idx, bank_addr;
+	int ret;
+
+	bank_idx = u8_buf[0];
+	bank_addr = u8_buf[1];
+
+	ret = i2c_smbus_read_i2c_block_data(info->i2c[bank_idx], bank_addr,
+					    val_size, val_buf);
+	if (ret < 0)
+		return ret;
+
+	if (ret != val_size)
+		return -EIO;
+
+	return 0;
+}
+
+static int mt6370_regmap_write(void *context, const void *data, size_t count)
+{
+	struct mt6370_info *info = context;
+	const u8 *u8_buf = data;
+	u8 bank_idx, bank_addr;
+	int len = count - MT6370_MAX_ADDRLEN;
+
+	bank_idx = u8_buf[0];
+	bank_addr = u8_buf[1];
+
+	return i2c_smbus_write_i2c_block_data(info->i2c[bank_idx], bank_addr,
+					      len, data + MT6370_MAX_ADDRLEN);
+}
+
+static const struct regmap_bus mt6370_regmap_bus = {
+	.read		= mt6370_regmap_read,
+	.write		= mt6370_regmap_write,
+};
+
+static const struct regmap_config mt6370_regmap_config = {
+	.reg_bits		= 16,
+	.val_bits		= 8,
+	.reg_format_endian	= REGMAP_ENDIAN_BIG,
+	.max_register		= MT6370_REG_MAXADDR,
+};
+
+static int mt6370_probe(struct i2c_client *i2c)
+{
+	struct mt6370_info *info;
+	struct i2c_client *usbc_i2c;
+	struct regmap *regmap;
+	struct device *dev = &i2c->dev;
+	int ret, vid;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	usbc_i2c = devm_i2c_new_dummy_device(dev, i2c->adapter,
+					     MT6370_USBC_I2CADDR);
+	if (IS_ERR(usbc_i2c))
+		return dev_err_probe(dev, PTR_ERR(usbc_i2c),
+				     "Failed to register USBC I2C client\n");
+
+	/* Assign I2C client for PMU and TypeC */
+	info->i2c[MT6370_PMU_I2C] = i2c;
+	info->i2c[MT6370_USBC_I2C] = usbc_i2c;
+
+	regmap = devm_regmap_init(dev, &mt6370_regmap_bus,
+				  info, &mt6370_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap),
+				     "Failed to init regmap\n");
+
+	ret = mt6370_check_vendor_info(dev, regmap, &vid);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+	ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
+				       IRQF_ONESHOT, -1, &mt6370_irq_chip,
+				       &info->irq_data);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add irq chip\n");
+
+	switch (vid) {
+	case MT6370_VENID_MT6372P:
+	case MT6370_VENID_MT6372CP:
+		ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
+					   mt6372_exclusive_devices,
+					   ARRAY_SIZE(mt6372_exclusive_devices),
+					   NULL, 0,
+					   regmap_irq_get_domain(info->irq_data));
+		break;
+	default:
+		ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
+					   mt6370_exclusive_devices,
+					   ARRAY_SIZE(mt6370_exclusive_devices),
+					   NULL, 0,
+					   regmap_irq_get_domain(info->irq_data));
+		break;
+	}
+
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add the exclusive devices\n");
+
+	return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
+				    mt6370_devices, ARRAY_SIZE(mt6370_devices),
+				    NULL, 0,
+				    regmap_irq_get_domain(info->irq_data));
+}
+
+static const struct of_device_id mt6370_match_table[] = {
+	{ .compatible = "mediatek,mt6370" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_match_table);
+
+static struct i2c_driver mt6370_driver = {
+	.driver = {
+		.name = "mt6370",
+		.of_match_table = mt6370_match_table,
+	},
+	.probe_new = mt6370_probe,
+};
+module_i2c_driver(mt6370_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("MediaTek MT6370 SubPMIC Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/mt6370.h b/drivers/mfd/mt6370.h
new file mode 100644
index 0000000..094e59e
--- /dev/null
+++ b/drivers/mfd/mt6370.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#ifndef __MFD_MT6370_H__
+#define __MFD_MT6370_H__
+
+/* IRQ definitions */
+#define MT6370_IRQ_DIRCHGON		0
+#define MT6370_IRQ_CHG_TREG		4
+#define MT6370_IRQ_CHG_AICR		5
+#define MT6370_IRQ_CHG_MIVR		6
+#define MT6370_IRQ_PWR_RDY		7
+#define MT6370_IRQ_FL_CHG_VINOVP	11
+#define MT6370_IRQ_CHG_VSYSUV		12
+#define MT6370_IRQ_CHG_VSYSOV		13
+#define MT6370_IRQ_CHG_VBATOV		14
+#define MT6370_IRQ_CHG_VINOVPCHG	15
+#define MT6370_IRQ_TS_BAT_COLD		20
+#define MT6370_IRQ_TS_BAT_COOL		21
+#define MT6370_IRQ_TS_BAT_WARM		22
+#define MT6370_IRQ_TS_BAT_HOT		23
+#define MT6370_IRQ_TS_STATC		24
+#define MT6370_IRQ_CHG_FAULT		25
+#define MT6370_IRQ_CHG_STATC		26
+#define MT6370_IRQ_CHG_TMR		27
+#define MT6370_IRQ_CHG_BATABS		28
+#define MT6370_IRQ_CHG_ADPBAD		29
+#define MT6370_IRQ_CHG_RVP		30
+#define MT6370_IRQ_TSHUTDOWN		31
+#define MT6370_IRQ_CHG_IINMEAS		32
+#define MT6370_IRQ_CHG_ICCMEAS		33
+#define MT6370_IRQ_CHGDET_DONE		34
+#define MT6370_IRQ_WDTMR		35
+#define MT6370_IRQ_SSFINISH		36
+#define MT6370_IRQ_CHG_RECHG		37
+#define MT6370_IRQ_CHG_TERM		38
+#define MT6370_IRQ_CHG_IEOC		39
+#define MT6370_IRQ_ADC_DONE		40
+#define MT6370_IRQ_PUMPX_DONE		41
+#define MT6370_IRQ_BST_BATUV		45
+#define MT6370_IRQ_BST_MIDOV		46
+#define MT6370_IRQ_BST_OLP		47
+#define MT6370_IRQ_ATTACH		48
+#define MT6370_IRQ_DETACH		49
+#define MT6370_IRQ_HVDCP_STPDONE	51
+#define MT6370_IRQ_HVDCP_VBUSDET_DONE	52
+#define MT6370_IRQ_HVDCP_DET		53
+#define MT6370_IRQ_CHGDET		54
+#define MT6370_IRQ_DCDT			55
+#define MT6370_IRQ_DIRCHG_VGOK		59
+#define MT6370_IRQ_DIRCHG_WDTMR		60
+#define MT6370_IRQ_DIRCHG_UC		61
+#define MT6370_IRQ_DIRCHG_OC		62
+#define MT6370_IRQ_DIRCHG_OV		63
+#define MT6370_IRQ_OVPCTRL_SWON		67
+#define MT6370_IRQ_OVPCTRL_UVP_D	68
+#define MT6370_IRQ_OVPCTRL_UVP		69
+#define MT6370_IRQ_OVPCTRL_OVP_D	70
+#define MT6370_IRQ_OVPCTRL_OVP		71
+#define MT6370_IRQ_FLED_STRBPIN		72
+#define MT6370_IRQ_FLED_TORPIN		73
+#define MT6370_IRQ_FLED_TX		74
+#define MT6370_IRQ_FLED_LVF		75
+#define MT6370_IRQ_FLED2_SHORT		78
+#define MT6370_IRQ_FLED1_SHORT		79
+#define MT6370_IRQ_FLED2_STRB		80
+#define MT6370_IRQ_FLED1_STRB		81
+#define mT6370_IRQ_FLED2_STRB_TO	82
+#define MT6370_IRQ_FLED1_STRB_TO	83
+#define MT6370_IRQ_FLED2_TOR		84
+#define MT6370_IRQ_FLED1_TOR		85
+#define MT6370_IRQ_OTP			93
+#define MT6370_IRQ_VDDA_OVP		94
+#define MT6370_IRQ_VDDA_UV		95
+#define MT6370_IRQ_LDO_OC		103
+#define MT6370_IRQ_BLED_OCP		118
+#define MT6370_IRQ_BLED_OVP		119
+#define MT6370_IRQ_DSV_VNEG_OCP		123
+#define MT6370_IRQ_DSV_VPOS_OCP		124
+#define MT6370_IRQ_DSV_BST_OCP		125
+#define MT6370_IRQ_DSV_VNEG_SCP		126
+#define MT6370_IRQ_DSV_VPOS_SCP		127
+
+enum {
+	MT6370_USBC_I2C = 0,
+	MT6370_PMU_I2C,
+	MT6370_MAX_I2C
+};
+
+struct mt6370_info {
+	struct i2c_client *i2c[MT6370_MAX_I2C];
+	struct regmap_irq_chip_data *irq_data;
+};
+
+#endif /* __MFD_MT6375_H__ */
-- 
2.7.4

[PATCH v7 08/13] usb: typec: tcpci_mt6370: Add MediaTek MT6370 tcpci driver

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

The MediaTek MT6370 is a highly-integrated smart power management IC,
which includes a single cell Li-Ion/Li-Polymer switching battery
charger, a USB Type-C & Power Delivery (PD) controller, dual
Flash LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

Add a support for the Type-C & Power Delivery controller in
MediaTek MT6370 IC.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Revise 'devm_add_action_or_reset(dev, ...)' to one line
- Revise 'return regmap_update_bits(...)' with using positive
  conditional
---
 drivers/usb/typec/tcpm/Kconfig        |  11 ++
 drivers/usb/typec/tcpm/Makefile       |   1 +
 drivers/usb/typec/tcpm/tcpci_mt6370.c | 207 ++++++++++++++++++++++++++++++++++
 3 files changed, 219 insertions(+)
 create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c

diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
index 073fd2e..e6b88ca 100644
--- a/drivers/usb/typec/tcpm/Kconfig
+++ b/drivers/usb/typec/tcpm/Kconfig
@@ -35,6 +35,17 @@ config TYPEC_MT6360
 	  USB Type-C. It works with Type-C Port Controller Manager
 	  to provide USB PD and USB Type-C functionalities.
 
+config TYPEC_TCPCI_MT6370
+	tristate "MediaTek MT6370 Type-C driver"
+	depends on MFD_MT6370
+	help
+	  MediaTek MT6370 is a multi-functional IC that includes
+	  USB Type-C. It works with Type-C Port Controller Manager
+	  to provide USB PD and USB Type-C functionalities.
+
+	  This driver can also be built as a module. The module
+	  will be called "tcpci_mt6370".
+
 config TYPEC_TCPCI_MAXIM
 	tristate "Maxim TCPCI based Type-C chip driver"
 	help
diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile
index 7d499f3..906d9dc 100644
--- a/drivers/usb/typec/tcpm/Makefile
+++ b/drivers/usb/typec/tcpm/Makefile
@@ -6,4 +6,5 @@ typec_wcove-y				:= wcove.o
 obj-$(CONFIG_TYPEC_TCPCI)		+= tcpci.o
 obj-$(CONFIG_TYPEC_RT1711H)		+= tcpci_rt1711h.o
 obj-$(CONFIG_TYPEC_MT6360)		+= tcpci_mt6360.o
+obj-$(CONFIG_TYPEC_TCPCI_MT6370)	+= tcpci_mt6370.o
 obj-$(CONFIG_TYPEC_TCPCI_MAXIM)		+= tcpci_maxim.o
diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c
new file mode 100644
index 0000000..c5bb201
--- /dev/null
+++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeup.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/tcpci.h>
+#include <linux/usb/tcpm.h>
+
+#define MT6370_REG_SYSCTRL8	0x9B
+
+#define MT6370_AUTOIDLE_MASK	BIT(3)
+
+#define MT6370_VENDOR_ID	0x29CF
+#define MT6370_TCPC_DID_A	0x2170
+
+struct mt6370_priv {
+	struct device *dev;
+	struct regulator *vbus;
+	struct tcpci *tcpci;
+	struct tcpci_data tcpci_data;
+};
+
+static const struct reg_sequence mt6370_reg_init[] = {
+	REG_SEQ(0xA0, 0x1, 1000),
+	REG_SEQ(0x81, 0x38, 0),
+	REG_SEQ(0x82, 0x82, 0),
+	REG_SEQ(0xBA, 0xFC, 0),
+	REG_SEQ(0xBB, 0x50, 0),
+	REG_SEQ(0x9E, 0x8F, 0),
+	REG_SEQ(0xA1, 0x5, 0),
+	REG_SEQ(0xA2, 0x4, 0),
+	REG_SEQ(0xA3, 0x4A, 0),
+	REG_SEQ(0xA4, 0x01, 0),
+	REG_SEQ(0x95, 0x01, 0),
+	REG_SEQ(0x80, 0x71, 0),
+	REG_SEQ(0x9B, 0x3A, 1000),
+};
+
+static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data)
+{
+	u16 did;
+	int ret;
+
+	ret = regmap_register_patch(data->regmap, mt6370_reg_init,
+				    ARRAY_SIZE(mt6370_reg_init));
+	if (ret)
+		return ret;
+
+	ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16));
+	if (ret)
+		return ret;
+
+	if (did == MT6370_TCPC_DID_A)
+		return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80);
+
+	return 0;
+}
+
+static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data,
+				 bool enable)
+{
+	return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8,
+				  MT6370_AUTOIDLE_MASK,
+				  enable ? 0 : MT6370_AUTOIDLE_MASK);
+}
+
+static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data,
+				bool source, bool sink)
+{
+	struct mt6370_priv *priv = container_of(data, struct mt6370_priv,
+						tcpci_data);
+	int ret;
+
+	ret = regulator_is_enabled(priv->vbus);
+	if (ret < 0)
+		return ret;
+
+	if (ret && !source)
+		return regulator_disable(priv->vbus);
+
+	if (!ret && source)
+		return regulator_enable(priv->vbus);
+
+	return 0;
+}
+
+static irqreturn_t mt6370_irq_handler(int irq, void *dev_id)
+{
+	struct mt6370_priv *priv = dev_id;
+
+	return tcpci_irq(priv->tcpci);
+}
+
+static int mt6370_check_vendor_info(struct mt6370_priv *priv)
+{
+	struct regmap *regmap = priv->tcpci_data.regmap;
+	u16 vid;
+	int ret;
+
+	ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16));
+	if (ret)
+		return ret;
+
+	if (vid != MT6370_VENDOR_ID)
+		return dev_err_probe(priv->dev, -ENODEV,
+				     "Vendor ID not correct 0x%02x\n", vid);
+
+	return 0;
+}
+
+static void mt6370_unregister_tcpci_port(void *tcpci)
+{
+	tcpci_unregister_port(tcpci);
+}
+
+static int mt6370_tcpc_probe(struct platform_device *pdev)
+{
+	struct mt6370_priv *priv;
+	struct device *dev = &pdev->dev;
+	int irq, ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = dev;
+
+	priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->tcpci_data.regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n");
+
+	ret = mt6370_check_vendor_info(priv);
+	if (ret)
+		return ret;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return dev_err_probe(dev, irq, "Failed to get irq\n");
+
+	/* Assign TCPCI feature and ops */
+	priv->tcpci_data.auto_discharge_disconnect = 1;
+	priv->tcpci_data.init = mt6370_tcpc_init;
+	priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn;
+
+	priv->vbus = devm_regulator_get_optional(dev, "vbus");
+	if (!IS_ERR(priv->vbus))
+		priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus;
+
+	priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data);
+	if (IS_ERR(priv->tcpci))
+		return dev_err_probe(dev, PTR_ERR(priv->tcpci),
+				     "Failed to register tcpci port\n");
+
+	ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci);
+	if (ret)
+		return ret;
+
+	ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler,
+					IRQF_ONESHOT, dev_name(dev), priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to allocate irq\n");
+
+	device_init_wakeup(dev, true);
+	dev_pm_set_wake_irq(dev, irq);
+
+	return 0;
+}
+
+static int mt6370_tcpc_remove(struct platform_device *pdev)
+{
+	dev_pm_clear_wake_irq(&pdev->dev);
+	device_init_wakeup(&pdev->dev, false);
+
+	return 0;
+}
+
+static const struct of_device_id mt6370_tcpc_devid_table[] = {
+	{ .compatible = "mediatek,mt6370-tcpc" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table);
+
+static struct platform_driver mt6370_tcpc_driver = {
+	.driver = {
+		.name = "mt6370-tcpc",
+		.of_match_table = mt6370_tcpc_devid_table,
+	},
+	.probe = mt6370_tcpc_probe,
+	.remove = mt6370_tcpc_remove,
+};
+module_platform_driver(mt6370_tcpc_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[PATCH v7 09/13] iio: adc: mt6370: Add MediaTek MT6370 support

[ChiaEn Wu]

From: ChiaEn Wu <chiaen_wu@richtek.com>

MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
driver, display bias voltage supply, one general purpose LDO, and the
USB Type-C & PD controller complies with the latest USB Type-C and PD
standards.

Add a support for the MT6370 ADC driver for system monitoring, including
charger current, voltage, and temperature.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Add AICR(100mA ~ 350mA), ICHG(100mA ~ 800mA) macros
- Remove 400mA AICR and 900mA ICHG macros
- Revise using 'if-else' to 'switch-case' in mt6370_adc_read_scale()
  where the adc channel is ibus or ibat
---
 drivers/iio/adc/Kconfig      |  12 ++
 drivers/iio/adc/Makefile     |   1 +
 drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 318 insertions(+)
 create mode 100644 drivers/iio/adc/mt6370-adc.c

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 7fe5930..995cbb5 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -736,6 +736,18 @@ config MEDIATEK_MT6360_ADC
 	  is used in smartphones and tablets and supports a 11 channel
 	  general purpose ADC.
 
+config MEDIATEK_MT6370_ADC
+	tristate "MediaTek MT6370 ADC driver"
+	depends on MFD_MT6370
+	help
+	  Say yes here to enable MediaTek MT6370 ADC support.
+
+	  This ADC driver provides 9 channels for system monitoring (charger
+	  current, voltage, and temperature).
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "mt6370-adc".
+
 config MEDIATEK_MT6577_AUXADC
 	tristate "MediaTek AUXADC driver"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 1772a54..c6bc35f 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
 obj-$(CONFIG_MCP3422) += mcp3422.o
 obj-$(CONFIG_MCP3911) += mcp3911.o
 obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
+obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
 obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
 obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
 obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
new file mode 100644
index 0000000..2a46471
--- /dev/null
+++ b/drivers/iio/adc/mt6370-adc.c
@@ -0,0 +1,305 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiaEn Wu <chiaen_wu@richtek.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/iio/iio.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/sysfs.h>
+#include <linux/units.h>
+
+#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
+
+#define MT6370_REG_CHG_CTRL3		0x113
+#define MT6370_REG_CHG_CTRL7		0x117
+#define MT6370_REG_CHG_ADC		0x121
+#define MT6370_REG_ADC_DATA_H		0x14C
+
+#define MT6370_ADC_START_MASK		BIT(0)
+#define MT6370_ADC_IN_SEL_MASK		GENMASK(7, 4)
+#define MT6370_AICR_ICHG_MASK		GENMASK(7, 2)
+
+#define MT6370_AICR_100_mA		0x0
+#define MT6370_AICR_150_mA		0x1
+#define MT6370_AICR_200_mA		0x2
+#define MT6370_AICR_250_mA		0x3
+#define MT6370_AICR_300_mA		0x4
+#define MT6370_AICR_350_mA		0x5
+
+#define MT6370_ICHG_100_mA		0x0
+#define MT6370_ICHG_200_mA		0x1
+#define MT6370_ICHG_300_mA		0x2
+#define MT6370_ICHG_400_mA		0x3
+#define MT6370_ICHG_500_mA		0x4
+#define MT6370_ICHG_600_mA		0x5
+#define MT6370_ICHG_700_mA		0x6
+#define MT6370_ICHG_800_mA		0x7
+
+#define ADC_CONV_TIME_MS		35
+#define ADC_CONV_POLLING_TIME_US	1000
+
+struct mt6370_adc_data {
+	struct device *dev;
+	struct regmap *regmap;
+	/*
+	 * This mutex lock is for preventing the different ADC channels
+	 * from being read at the same time.
+	 */
+	struct mutex adc_lock;
+};
+
+static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
+				   unsigned long addr, int *val)
+{
+	unsigned int reg_val;
+	__be16 be_val;
+	int ret;
+
+	mutex_lock(&priv->adc_lock);
+
+	reg_val = MT6370_ADC_START_MASK |
+		  FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
+	ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
+	if (ret)
+		goto adc_unlock;
+
+	msleep(ADC_CONV_TIME_MS);
+
+	ret = regmap_read_poll_timeout(priv->regmap,
+				       MT6370_REG_CHG_ADC, reg_val,
+				       !(reg_val & MT6370_ADC_START_MASK),
+				       ADC_CONV_POLLING_TIME_US,
+				       ADC_CONV_TIME_MS * MILLI * 3);
+	if (ret) {
+		dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
+		goto adc_unlock;
+	}
+
+	ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
+			      &be_val, sizeof(be_val));
+	if (ret)
+		goto adc_unlock;
+
+	*val = be16_to_cpu(be_val);
+	ret = IIO_VAL_INT;
+
+adc_unlock:
+	mutex_unlock(&priv->adc_lock);
+
+	return ret;
+}
+
+static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
+				 int chan, int *val1, int *val2)
+{
+	unsigned int reg_val;
+	int ret;
+
+	switch (chan) {
+	case MT6370_CHAN_VBAT:
+	case MT6370_CHAN_VSYS:
+	case MT6370_CHAN_CHG_VDDP:
+		*val1 = 5;
+		return IIO_VAL_INT;
+	case MT6370_CHAN_IBUS:
+		ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, &reg_val);
+		if (ret)
+			return ret;
+
+		reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
+		switch (reg_val) {
+		case MT6370_AICR_100_mA:
+		case MT6370_AICR_150_mA:
+		case MT6370_AICR_200_mA:
+		case MT6370_AICR_250_mA:
+		case MT6370_AICR_300_mA:
+		case MT6370_AICR_350_mA:
+			*val1 = 3350;
+			break;
+		default:
+			*val1 = 5000;
+			break;
+		}
+
+		*val2 = 100;
+
+		return IIO_VAL_FRACTIONAL;
+	case MT6370_CHAN_IBAT:
+		ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, &reg_val);
+		if (ret)
+			return ret;
+
+		reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
+		switch (reg_val) {
+		case MT6370_ICHG_100_mA:
+		case MT6370_ICHG_200_mA:
+		case MT6370_ICHG_300_mA:
+		case MT6370_ICHG_400_mA:
+			*val1 = 2375;
+			break;
+		case MT6370_ICHG_500_mA:
+		case MT6370_ICHG_600_mA:
+		case MT6370_ICHG_700_mA:
+		case MT6370_ICHG_800_mA:
+			*val1 = 2680;
+			break;
+		default:
+			*val1 = 5000;
+			break;
+		}
+
+		*val2 = 100;
+
+		return IIO_VAL_FRACTIONAL;
+	case MT6370_CHAN_VBUSDIV5:
+		*val1 = 25;
+		return IIO_VAL_INT;
+	case MT6370_CHAN_VBUSDIV2:
+		*val1 = 50;
+		return IIO_VAL_INT;
+	case MT6370_CHAN_TS_BAT:
+		*val1 = 25;
+		*val2 = 10000;
+		return IIO_VAL_FRACTIONAL;
+	case MT6370_CHAN_TEMP_JC:
+		*val1 = 2000;
+		return IIO_VAL_FRACTIONAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
+				  int chan, int *val)
+{
+	*val = -20;
+
+	return IIO_VAL_INT;
+}
+
+static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
+			       const struct iio_chan_spec *chan,
+			       int *val, int *val2, long mask)
+{
+	struct mt6370_adc_data *priv = iio_priv(iio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		return mt6370_adc_read_channel(priv, chan->channel,
+					       chan->address, val);
+	case IIO_CHAN_INFO_SCALE:
+		return mt6370_adc_read_scale(priv, chan->channel, val, val2);
+	case IIO_CHAN_INFO_OFFSET:
+		return mt6370_adc_read_offset(priv, chan->channel, val);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
+	[MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
+	[MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
+	[MT6370_CHAN_VSYS] = "vsys",
+	[MT6370_CHAN_VBAT] = "vbat",
+	[MT6370_CHAN_TS_BAT] = "ts_bat",
+	[MT6370_CHAN_IBUS] = "ibus",
+	[MT6370_CHAN_IBAT] = "ibat",
+	[MT6370_CHAN_CHG_VDDP] = "chg_vddp",
+	[MT6370_CHAN_TEMP_JC] = "temp_jc",
+};
+
+static int mt6370_adc_read_label(struct iio_dev *iio_dev,
+				 struct iio_chan_spec const *chan, char *label)
+{
+	return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
+}
+
+static const struct iio_info mt6370_adc_iio_info = {
+	.read_raw = mt6370_adc_read_raw,
+	.read_label = mt6370_adc_read_label,
+};
+
+#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) {	\
+	.type = _type,						\
+	.channel = MT6370_CHAN_##_idx,				\
+	.address = _addr,					\
+	.scan_index = MT6370_CHAN_##_idx,			\
+	.indexed = 1,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
+			      BIT(IIO_CHAN_INFO_SCALE) |	\
+			      _extra_info,			\
+}
+
+static const struct iio_chan_spec mt6370_adc_channels[] = {
+	MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
+	MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
+	MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
+	MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
+	MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
+	MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
+	MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
+	MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
+	MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
+};
+
+static int mt6370_adc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mt6370_adc_data *priv;
+	struct iio_dev *indio_dev;
+	struct regmap *regmap;
+	int ret;
+
+	regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	priv = iio_priv(indio_dev);
+	priv->dev = dev;
+	priv->regmap = regmap;
+	mutex_init(&priv->adc_lock);
+
+	ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to reset ADC\n");
+
+	indio_dev->name = "mt6370-adc";
+	indio_dev->info = &mt6370_adc_iio_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = mt6370_adc_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct of_device_id mt6370_adc_of_id[] = {
+	{ .compatible = "mediatek,mt6370-adc", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
+
+static struct platform_driver mt6370_adc_driver = {
+	.driver = {
+		.name = "mt6370-adc",
+		.of_match_table = mt6370_adc_of_id,
+	},
+	.probe = mt6370_adc_probe,
+};
+module_platform_driver(mt6370_adc_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
+MODULE_DESCRIPTION("MT6370 ADC Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[PATCH v7 10/13] power: supply: mt6370: Add MediaTek MT6370 charger driver

[ChiaEn Wu]

From: ChiaEn Wu <chiaen_wu@richtek.com>

MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
driver, display bias voltage supply, one general purpose LDO, and the
USB Type-C & PD controller complies with the latest USB Type-C and PD
standards.

Add a support for the MediaTek MT6370 Charger driver. The charger module
of MT6370 supports High-Accuracy Voltage/Current Regulation,
Average Input Current Regulation, Battery Temperature Sensing,
Over-Temperature Protection, DPDM Detection for BC1.2.

Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Revise the method to enable/disable irq
- Revise all 'if (ret < 0)' to 'if (ret)' after using
  mt6370_chg_field_set/get()
- Revise all 'OTG' text
---
 drivers/power/supply/Kconfig          |  14 +
 drivers/power/supply/Makefile         |   1 +
 drivers/power/supply/mt6370-charger.c | 965 ++++++++++++++++++++++++++++++++++
 3 files changed, 980 insertions(+)
 create mode 100644 drivers/power/supply/mt6370-charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 1aa8323..591deb8 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -619,6 +619,20 @@ config CHARGER_MT6360
 	  Average Input Current Regulation, Battery Temperature Sensing,
 	  Over-Temperature Protection, DPDM Detection for BC1.2.
 
+config CHARGER_MT6370
+	tristate "MediaTek MT6370 Charger Driver"
+	depends on MFD_MT6370
+	depends on REGULATOR
+	select LINEAR_RANGES
+	help
+	  Say Y here to enable MT6370 Charger Part.
+	  The device supports High-Accuracy Voltage/Current Regulation,
+	  Average Input Current Regulation, Battery Temperature Sensing,
+	  Over-Temperature Protection, DPDM Detection for BC1.2.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "mt6370-charger".
+
 config CHARGER_QCOM_SMBB
 	tristate "Qualcomm Switch-Mode Battery Charger and Boost"
 	depends on MFD_SPMI_PMIC || COMPILE_TEST
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 7f02f36..8c95276 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_MP2629)	+= mp2629_charger.o
 obj-$(CONFIG_CHARGER_MT6360)	+= mt6360_charger.o
+obj-$(CONFIG_CHARGER_MT6370)	+= mt6370-charger.o
 obj-$(CONFIG_CHARGER_QCOM_SMBB)	+= qcom_smbb.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o
 obj-$(CONFIG_CHARGER_BQ24190)	+= bq24190_charger.o
diff --git a/drivers/power/supply/mt6370-charger.c b/drivers/power/supply/mt6370-charger.c
new file mode 100644
index 0000000..42fddc3
--- /dev/null
+++ b/drivers/power/supply/mt6370-charger.c
@@ -0,0 +1,965 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiaEn Wu <chiaen_wu@richtek.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/linear_range.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/workqueue.h>
+
+#define MT6370_REG_CHG_CTRL1		0x111
+#define MT6370_REG_CHG_CTRL2		0x112
+#define MT6370_REG_CHG_CTRL3		0x113
+#define MT6370_REG_CHG_CTRL4		0x114
+#define MT6370_REG_CHG_CTRL5		0x115
+#define MT6370_REG_CHG_CTRL6		0x116
+#define MT6370_REG_CHG_CTRL7		0x117
+#define MT6370_REG_CHG_CTRL8		0x118
+#define MT6370_REG_CHG_CTRL9		0x119
+#define MT6370_REG_CHG_CTRL10		0x11A
+#define MT6370_REG_DEVICE_TYPE		0x122
+#define MT6370_REG_USB_STATUS1		0x127
+#define MT6370_REG_CHG_STAT		0x14A
+#define MT6370_REG_FLED_EN		0x17E
+#define MT6370_REG_CHG_STAT1		0X1D0
+#define MT6370_REG_OVPCTRL_STAT		0x1D8
+
+#define MT6370_VOBST_MASK		GENMASK(7, 2)
+#define MT6370_OTG_PIN_EN_MASK		BIT(1)
+#define MT6370_OPA_MODE_MASK		BIT(0)
+#define MT6370_OTG_OC_MASK		GENMASK(2, 0)
+
+#define MT6370_MIVR_IBUS_TH_100_mA	100000
+#define MT6370_ADC_CHAN_IBUS		5
+#define MT6370_ADC_CHAN_MAX		9
+
+enum mt6370_chg_reg_field {
+	/* MT6370_REG_CHG_CTRL2 */
+	F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
+	/* MT6370_REG_CHG_CTRL3 */
+	F_IAICR, F_AICR_EN, F_ILIM_EN,
+	/* MT6370_REG_CHG_CTRL4 */
+	F_VOREG,
+	/* MT6370_REG_CHG_CTRL6 */
+	F_VMIVR,
+	/* MT6370_REG_CHG_CTRL7 */
+	F_ICHG,
+	/* MT6370_REG_CHG_CTRL8 */
+	F_IPREC,
+	/* MT6370_REG_CHG_CTRL9 */
+	F_IEOC,
+	/* MT6370_REG_DEVICE_TYPE */
+	F_USBCHGEN,
+	/* MT6370_REG_USB_STATUS1 */
+	F_USB_STAT, F_CHGDET,
+	/* MT6370_REG_CHG_STAT */
+	F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
+	/* MT6370_REG_FLED_EN */
+	F_FL_STROBE,
+	/* MT6370_REG_CHG_STAT1 */
+	F_CHG_MIVR_STAT,
+	/* MT6370_REG_OVPCTRL_STAT */
+	F_UVP_D_STAT,
+	F_MAX
+};
+
+enum mt6370_irq {
+	MT6370_IRQ_ATTACH_I = 0,
+	MT6370_IRQ_UVP_D_EVT,
+	MT6370_IRQ_MIVR,
+	MT6370_IRQ_MAX
+};
+
+struct mt6370_priv {
+	struct device *dev;
+	struct iio_channel *iio_adcs;
+	struct mutex attach_lock;
+	struct power_supply *psy;
+	struct regmap *regmap;
+	struct regmap_field *rmap_fields[F_MAX];
+	struct regulator_dev *rdev;
+	struct workqueue_struct *wq;
+	struct work_struct bc12_work;
+	struct delayed_work mivr_dwork;
+	unsigned int irq_nums[MT6370_IRQ_MAX];
+	int attach;
+	int psy_usb_type;
+	bool pwr_rdy;
+};
+
+enum mt6370_usb_status {
+	MT6370_USB_STAT_NO_VBUS = 0,
+	MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
+	MT6370_USB_STAT_SDP,
+	MT6370_USB_STAT_SDP_NSTD,
+	MT6370_USB_STAT_DCP,
+	MT6370_USB_STAT_CDP,
+	MT6370_USB_STAT_MAX
+};
+
+struct mt6370_chg_field {
+	const char *name;
+	const struct linear_range *range;
+	struct reg_field field;
+};
+
+enum {
+	MT6370_RANGE_F_IAICR = 0,
+	MT6370_RANGE_F_VOREG,
+	MT6370_RANGE_F_VMIVR,
+	MT6370_RANGE_F_ICHG,
+	MT6370_RANGE_F_IPREC,
+	MT6370_RANGE_F_IEOC,
+	MT6370_RANGE_F_MAX
+};
+
+#define MT6370_CHG_LINEAR_RANGE(_rfd, _min, _min_sel, _max_sel, _step)	\
+[_rfd] = {								\
+	.min = _min,							\
+	.min_sel = _min_sel,						\
+	.max_sel = _max_sel,						\
+	.step = _step,							\
+}
+
+static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
+	MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
+	MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
+	MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
+	MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
+	MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
+	MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
+};
+
+#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb)				\
+[_fd] = {								\
+	.name = #_fd,							\
+	.range = NULL,							\
+	.field = REG_FIELD(_reg, _lsb, _msb),				\
+}
+
+#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb)			\
+[_fd] = {								\
+	.name = #_fd,							\
+	.range = &mt6370_chg_ranges[MT6370_RANGE_##_fd],		\
+	.field = REG_FIELD(_reg, _lsb, _msb),				\
+}
+
+static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
+	MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
+	MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
+	MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
+	MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
+	MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
+	MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
+	MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
+	MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
+	MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
+	MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
+	MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
+	MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
+	MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
+	MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
+	MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
+	MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
+	MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
+	MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
+	MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
+	MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
+};
+
+static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
+				       enum mt6370_chg_reg_field fd,
+				       unsigned int *val)
+{
+	int ret;
+	unsigned int reg_val;
+
+	ret = regmap_field_read(priv->rmap_fields[fd], &reg_val);
+	if (ret)
+		return ret;
+
+	if (mt6370_chg_fields[fd].range)
+		return linear_range_get_value(mt6370_chg_fields[fd].range,
+					       reg_val, val);
+
+	*val = reg_val;
+	return 0;
+}
+
+static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
+				       enum mt6370_chg_reg_field fd,
+				       unsigned int val)
+{
+	int ret;
+	bool f;
+	const struct linear_range *r;
+
+	if (mt6370_chg_fields[fd].range) {
+		r = mt6370_chg_fields[fd].range;
+
+		if (fd == F_VMIVR) {
+			ret = linear_range_get_selector_high(r, val, &val, &f);
+			if (ret)
+				val = r->max_sel;
+		} else {
+			linear_range_get_selector_within(r, val, &val);
+		}
+	}
+
+	return regmap_field_write(priv->rmap_fields[fd], val);
+}
+
+enum {
+	MT6370_CHG_STAT_READY = 0,
+	MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
+	MT6370_CHG_STAT_DONE,
+	MT6370_CHG_STAT_FAULT,
+	MT6370_CHG_STAT_MAX
+};
+
+enum {
+	MT6370_ATTACH_STAT_DETACH = 0,
+	MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE,
+	MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
+	MT6370_ATTACH_STAT_ATTACH_MAX
+};
+
+static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
+				      const struct regulator_desc *rdesc,
+				      struct regulator_config *rcfg)
+{
+	struct mt6370_priv *priv = rcfg->driver_data;
+
+	rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
+						 "enable", 0, GPIOD_OUT_LOW |
+						 GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+						 rdesc->name);
+	if (IS_ERR(rcfg->ena_gpiod)) {
+		rcfg->ena_gpiod = NULL;
+		return 0;
+	}
+
+	return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
+				  MT6370_OTG_PIN_EN_MASK,
+				  MT6370_OTG_PIN_EN_MASK);
+}
+
+static void mt6370_chg_bc12_work_func(struct work_struct *work)
+{
+	struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
+						bc12_work);
+	int ret;
+	bool rpt_psy = false;
+	unsigned int attach, usb_stat;
+
+	mutex_lock(&priv->attach_lock);
+	attach = priv->attach;
+
+	switch (attach) {
+	case MT6370_ATTACH_STAT_DETACH:
+		usb_stat = 0;
+		break;
+	case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
+		ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
+		if (ret) {
+			dev_err(priv->dev, "Failed to get USB status\n");
+			goto bc12_work_func_out;
+		}
+		break;
+	case MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE:
+		ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
+		if (ret)
+			dev_err(priv->dev, "Failed to enable USB CHG EN\n");
+		goto bc12_work_func_out;
+	default:
+		dev_err(priv->dev, "Invalid attach state\n");
+		goto bc12_work_func_out;
+	}
+
+	rpt_psy = true;
+
+	switch (usb_stat) {
+	case MT6370_USB_STAT_SDP:
+	case MT6370_USB_STAT_SDP_NSTD:
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case MT6370_USB_STAT_DCP:
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case MT6370_USB_STAT_CDP:
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	case MT6370_USB_STAT_NO_VBUS:
+	case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
+	default:
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		break;
+	}
+
+bc12_work_func_out:
+	mutex_unlock(&priv->attach_lock);
+
+	if (rpt_psy)
+		power_supply_changed(priv->psy);
+}
+
+static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
+{
+	int ret;
+	unsigned int fl_strobe;
+
+	/* check if flash led in strobe mode */
+	ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
+		return ret;
+	}
+
+	if (fl_strobe) {
+		dev_err(priv->dev, "Flash led is still in strobe mode\n");
+		return ret;
+	}
+
+	/* cfo off */
+	ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
+	if (ret) {
+		dev_err(priv->dev, "Failed to disable CFO_EN\n");
+		return ret;
+	}
+
+	/* cfo on */
+	ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
+	if (ret)
+		dev_err(priv->dev, "Failed to enable CFO_EN\n");
+
+	return ret;
+}
+
+static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
+				    int *val)
+{
+	int ret;
+
+	if (chan >= MT6370_ADC_CHAN_MAX)
+		return -EINVAL;
+
+	ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
+	if (ret)
+		dev_err(priv->dev, "Failed to read ADC\n");
+
+	return ret;
+}
+
+static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
+{
+	struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
+						mivr_dwork.work);
+	int ret;
+	unsigned int mivr_stat, ibus;
+
+	ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get mivr state\n");
+		goto mivr_handler_out;
+	}
+
+	if (!mivr_stat)
+		goto mivr_handler_out;
+
+	ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get ibus\n");
+		goto mivr_handler_out;
+	}
+
+	if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
+		ret = mt6370_chg_toggle_cfo(priv);
+		if (ret)
+			dev_err(priv->dev, "Failed to toggle cfo\n");
+	}
+
+mivr_handler_out:
+	enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
+	pm_relax(priv->dev);
+}
+
+static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
+{
+	int ret;
+	unsigned int pwr_rdy, otg_en;
+	union power_supply_propval val;
+
+	/* Check in OTG mode or not */
+	ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get OTG state\n");
+		return;
+	}
+
+	if (otg_en)
+		return;
+
+	ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &pwr_rdy);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get pwr_rdy state reg\n");
+		return;
+	}
+
+	val.intval = !pwr_rdy;
+
+	ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
+					&val);
+	if (ret)
+		dev_err(priv->dev, "Failed to start attach/detach flow\n");
+}
+
+static int mt6370_chg_get_online(struct mt6370_priv *priv,
+				 union power_supply_propval *val)
+{
+	mutex_lock(&priv->attach_lock);
+	val->intval = !!priv->attach;
+	mutex_unlock(&priv->attach_lock);
+
+	return 0;
+}
+
+static int mt6370_chg_get_status(struct mt6370_priv *priv,
+				 union power_supply_propval *val)
+{
+	int ret;
+	unsigned int chg_stat;
+	union power_supply_propval online;
+
+	ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
+					&online);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get online status\n");
+		return ret;
+	}
+
+	if (!online.intval) {
+		val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		return 0;
+	}
+
+	ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+	if (ret)
+		return ret;
+
+	switch (chg_stat) {
+	case MT6370_CHG_STAT_READY:
+	case MT6370_CHG_STAT_FAULT:
+		val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		return ret;
+	case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+		val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		return ret;
+	case MT6370_CHG_STAT_DONE:
+		val->intval = POWER_SUPPLY_STATUS_FULL;
+		return ret;
+	default:
+		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+		return ret;
+	}
+}
+
+static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
+				      union power_supply_propval *val)
+{
+	int type, ret;
+	unsigned int chg_stat, vbat_lvl;
+
+	ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+	if (ret)
+		return ret;
+
+	ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
+	if (ret)
+		return ret;
+
+	switch (chg_stat) {
+	case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+		if (vbat_lvl)
+			type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		else
+			type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		break;
+	case MT6370_CHG_STAT_READY:
+	case MT6370_CHG_STAT_DONE:
+	case MT6370_CHG_STAT_FAULT:
+	default:
+		type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	}
+
+	val->intval = type;
+
+	return 0;
+}
+
+static int mt6370_chg_set_online(struct mt6370_priv *priv,
+				 const union power_supply_propval *val)
+{
+	bool pwr_rdy = !!val->intval;
+
+	mutex_lock(&priv->attach_lock);
+	if (pwr_rdy == !!priv->attach) {
+		dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
+		mutex_unlock(&priv->attach_lock);
+		return 0;
+	}
+
+	priv->attach = pwr_rdy;
+	mutex_unlock(&priv->attach_lock);
+
+	if (!queue_work(priv->wq, &priv->bc12_work))
+		dev_err(priv->dev, "bc12 work has already queued\n");
+
+	return 0;
+}
+
+static int mt6370_chg_get_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	struct mt6370_priv *priv = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		return mt6370_chg_get_online(priv, val);
+	case POWER_SUPPLY_PROP_STATUS:
+		return mt6370_chg_get_status(priv, val);
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		return mt6370_chg_get_charge_type(priv, val);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
+		return 0;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
+		return 0;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		val->intval = priv->psy_usb_type;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mt6370_chg_set_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   const union power_supply_propval *val)
+{
+	struct mt6370_priv *priv = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		return mt6370_chg_set_online(priv, val);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return mt6370_chg_field_set(priv, F_ICHG, val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return mt6370_chg_field_set(priv, F_VOREG, val->intval);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return mt6370_chg_field_set(priv, F_IAICR, val->intval);
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		return mt6370_chg_field_set(priv, F_IPREC, val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return mt6370_chg_field_set(priv, F_IEOC, val->intval);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mt6370_chg_property_is_writeable(struct power_supply *psy,
+					    enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static enum power_supply_property mt6370_chg_properties[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+	POWER_SUPPLY_PROP_USB_TYPE,
+};
+
+static enum power_supply_usb_type mt6370_chg_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+};
+
+static const struct power_supply_desc mt6370_chg_psy_desc = {
+	.name = "mt6370-charger",
+	.type = POWER_SUPPLY_TYPE_USB,
+	.properties = mt6370_chg_properties,
+	.num_properties = ARRAY_SIZE(mt6370_chg_properties),
+	.get_property = mt6370_chg_get_property,
+	.set_property = mt6370_chg_set_property,
+	.property_is_writeable = mt6370_chg_property_is_writeable,
+	.usb_types = mt6370_chg_usb_types,
+	.num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
+};
+
+static const struct regulator_ops mt6370_chg_otg_ops = {
+	.list_voltage = regulator_list_voltage_linear,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_current_limit = regulator_set_current_limit_regmap,
+	.get_current_limit = regulator_get_current_limit_regmap,
+};
+
+static const u32 mt6370_chg_otg_oc_ma[] = {
+	500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
+};
+
+static const struct regulator_desc mt6370_chg_otg_rdesc = {
+	.of_match = "usb-otg-vbus-regulator",
+	.of_parse_cb = mt6370_chg_otg_of_parse_cb,
+	.name = "mt6370-usb-otg-vbus",
+	.ops = &mt6370_chg_otg_ops,
+	.owner = THIS_MODULE,
+	.type = REGULATOR_VOLTAGE,
+	.min_uV = 4425000,
+	.uV_step = 25000,
+	.n_voltages = 57,
+	.vsel_reg = MT6370_REG_CHG_CTRL5,
+	.vsel_mask = MT6370_VOBST_MASK,
+	.enable_reg = MT6370_REG_CHG_CTRL1,
+	.enable_mask = MT6370_OPA_MODE_MASK,
+	.curr_table = mt6370_chg_otg_oc_ma,
+	.n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
+	.csel_reg = MT6370_REG_CHG_CTRL10,
+	.csel_mask = MT6370_OTG_OC_MASK,
+};
+
+static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
+{
+	int i;
+	const struct mt6370_chg_field *fds = mt6370_chg_fields;
+
+	for (i = 0; i < F_MAX; i++) {
+		priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
+							       priv->regmap,
+							       fds[i].field);
+		if (IS_ERR(priv->rmap_fields[i]))
+			return dev_err_probe(priv->dev,
+					PTR_ERR(priv->rmap_fields[i]),
+					"Failed to allocate regmapfield[%s]\n",
+					fds[i].name);
+	}
+
+	return 0;
+}
+
+static int mt6370_chg_init_setting(struct mt6370_priv *priv)
+{
+	int ret;
+
+	/* Disable usb_chg_en */
+	ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
+	if (ret) {
+		dev_err(priv->dev, "Failed to disable usb_chg_en\n");
+		return ret;
+	}
+
+	/* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
+	ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
+	if (ret) {
+		dev_err(priv->dev, "Failed to set ICHG to 900mA");
+		return ret;
+	}
+
+	/* Change input current limit selection to using IAICR results */
+	ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 3);
+	if (ret) {
+		dev_err(priv->dev, "Failed to set IINLMTSEL\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field)	\
+{							\
+	.name = "mediatek,chg-" #_name,			\
+	.type = MT6370_PARSE_TYPE_##_type,		\
+	.fd = _field,					\
+}
+
+static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
+{
+	struct regulator_config rcfg = {
+		.dev = priv->dev,
+		.regmap = priv->regmap,
+		.driver_data = priv,
+	};
+
+	priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
+					     &rcfg);
+
+	return PTR_ERR_OR_ZERO(priv->rdev);
+}
+
+static int mt6370_chg_init_psy(struct mt6370_priv *priv)
+{
+	struct power_supply_config cfg = {
+		.drv_data = priv,
+		.of_node = dev_of_node(priv->dev),
+	};
+
+	priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
+					       &cfg);
+
+	return PTR_ERR_OR_ZERO(priv->psy);
+}
+
+static void mt6370_chg_destroy_attach_lock(void *data)
+{
+	struct mutex *attach_lock = data;
+
+	mutex_destroy(attach_lock);
+}
+
+static void mt6370_chg_destroy_wq(void *data)
+{
+	struct workqueue_struct *wq = data;
+
+	flush_workqueue(wq);
+	destroy_workqueue(wq);
+}
+
+static void mt6370_chg_cancel_mivr_dwork(void *data)
+{
+	struct delayed_work *mivr_dwork = data;
+
+	cancel_delayed_work_sync(mivr_dwork);
+}
+
+static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
+{
+	struct mt6370_priv *priv = data;
+	unsigned int otg_en;
+	int ret;
+
+	/* Check in OTG mode or not */
+	ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get OTG state\n");
+		return IRQ_NONE;
+	}
+
+	if (otg_en)
+		return IRQ_HANDLED;
+
+	mutex_lock(&priv->attach_lock);
+	priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
+	mutex_unlock(&priv->attach_lock);
+
+	if (!queue_work(priv->wq, &priv->bc12_work))
+		dev_err(priv->dev, "bc12 work has already queued\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
+{
+	struct mt6370_priv *priv = data;
+
+	mt6370_chg_pwr_rdy_check(priv);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mt6370_mivr_handler(int irq, void *data)
+{
+	struct mt6370_priv *priv = data;
+
+	pm_stay_awake(priv->dev);
+	disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
+	schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
+
+	return IRQ_HANDLED;
+}
+
+#define MT6370_CHG_IRQ(_name)						\
+{									\
+	.name = #_name,							\
+	.handler = mt6370_##_name##_handler,				\
+}
+
+static int mt6370_chg_init_irq(struct mt6370_priv *priv)
+{
+	int i, ret;
+	const struct {
+		char *name;
+		irq_handler_t handler;
+	} mt6370_chg_irqs[] = {
+		MT6370_CHG_IRQ(attach_i),
+		MT6370_CHG_IRQ(uvp_d_evt),
+		MT6370_CHG_IRQ(mivr),
+	};
+
+	for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
+		ret = platform_get_irq_byname(to_platform_device(priv->dev),
+					      mt6370_chg_irqs[i].name);
+		if (ret < 0)
+			return dev_err_probe(priv->dev, ret,
+					     "Failed to get irq %s\n",
+					     mt6370_chg_irqs[i].name);
+
+		priv->irq_nums[i] = ret;
+		ret = devm_request_threaded_irq(priv->dev, ret, NULL,
+						mt6370_chg_irqs[i].handler,
+						IRQF_TRIGGER_FALLING,
+						dev_name(priv->dev), priv);
+		if (ret)
+			return dev_err_probe(priv->dev, ret,
+					     "Failed to request irq %s\n",
+					     mt6370_chg_irqs[i].name);
+	}
+
+	return 0;
+}
+
+static int mt6370_chg_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mt6370_priv *priv;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = &pdev->dev;
+
+	priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!priv->regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
+
+	ret = mt6370_chg_init_rmap_fields(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
+
+	platform_set_drvdata(pdev, priv);
+
+	priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
+	if (IS_ERR(priv->iio_adcs))
+		return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
+				     "Failed to get iio adc\n");
+
+	ret = mt6370_chg_init_otg_regulator(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
+
+	ret = mt6370_chg_init_psy(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init psy\n");
+
+	mutex_init(&priv->attach_lock);
+	ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
+				       &priv->attach_lock);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init attach lock\n");
+
+	priv->attach = MT6370_ATTACH_STAT_DETACH;
+
+	priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
+	if (IS_ERR(priv->wq))
+		return dev_err_probe(dev, PTR_ERR(priv->wq),
+				     "Failed to create workqueue\n");
+
+	ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init wq\n");
+
+	INIT_WORK(&priv->bc12_work, mt6370_chg_bc12_work_func);
+	INIT_DELAYED_WORK(&priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
+	ret = devm_add_action_or_reset(dev, mt6370_chg_cancel_mivr_dwork,
+				       &priv->mivr_dwork);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init mivr dwork\n");
+
+	ret = mt6370_chg_init_setting(priv);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to init mt6370 charger setting\n");
+
+	ret = mt6370_chg_init_irq(priv);
+	if (ret)
+		return ret;
+
+	mt6370_chg_pwr_rdy_check(priv);
+
+	return 0;
+}
+
+static const struct of_device_id mt6370_chg_of_match[] = {
+	{ .compatible = "mediatek,mt6370-charger", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
+
+static struct platform_driver mt6370_chg_driver = {
+	.probe = mt6370_chg_probe,
+	.driver = {
+		.name = "mt6370-charger",
+		.of_match_table = mt6370_chg_of_match,
+	},
+};
+module_platform_driver(mt6370_chg_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
+MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[PATCH v7 11/13] leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator support

[ChiaEn Wu]

From: ChiYuan Huang <cy_huang@richtek.com>

The MediaTek MT6370 is a highly-integrated smart power management IC,
which includes a single cell Li-Ion/Li-Polymer switching battery
charger, a USB Type-C & Power Delivery (PD) controller, dual
Flash LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

Add a support for the MediaTek MT6370 Current Sink Type LED Indicator
driver. It can control four channels current-sink RGB LEDs with 3 modes,
constant current, PWM, and breath mode.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Co-developed-by: Alice Chen <alice_chen@richtek.com>
Signed-off-by: Alice Chen <alice_chen@richtek.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Add the comment for the union of 'struct mt6370_led'
- Revise the wrong description of 'Authors'
- Revise some typos (e.g. led --> LED)
- Revise 'if (!fwnode_property_read_string())' to
  'ret = fwnode_property_read_string()'
- Replace 'memcpy(...)' with 'put_unaligned_be24()' in
  mt6370_gen_breath_pattern()
- Replace all 'LED_OFF' with 0
- Remove the redundant assignment in mt6370_mc_pattern_clear()
---
 drivers/leds/rgb/Kconfig           |   13 +
 drivers/leds/rgb/Makefile          |    1 +
 drivers/leds/rgb/leds-mt6370-rgb.c | 1022 ++++++++++++++++++++++++++++++++++++
 3 files changed, 1036 insertions(+)
 create mode 100644 drivers/leds/rgb/leds-mt6370-rgb.c

diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig
index 204cf47..7d86bb2 100644
--- a/drivers/leds/rgb/Kconfig
+++ b/drivers/leds/rgb/Kconfig
@@ -26,4 +26,17 @@ config LEDS_QCOM_LPG
 
 	  If compiled as a module, the module will be named leds-qcom-lpg.
 
+config LEDS_MT6370_RGB
+	tristate "LED Support for MediaTek MT6370 PMIC"
+	depends on MFD_MT6370
+	select LINEAR_RANGE
+	help
+	  Say Y here to enable support for MT6370_RGB LED device.
+	  In MT6370, there are four channel current-sink LED drivers that
+	  support hardware pattern for constant current, PWM, and breath mode.
+	  Isink4 channel can also be used as a CHG_VIN power good indicator.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "leds-mt6370-rgb".
+
 endif # LEDS_CLASS_MULTICOLOR
diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile
index 0675bc0..8c01daf 100644
--- a/drivers/leds/rgb/Makefile
+++ b/drivers/leds/rgb/Makefile
@@ -2,3 +2,4 @@
 
 obj-$(CONFIG_LEDS_PWM_MULTICOLOR)	+= leds-pwm-multicolor.o
 obj-$(CONFIG_LEDS_QCOM_LPG)		+= leds-qcom-lpg.o
+obj-$(CONFIG_LEDS_MT6370_RGB)		+= leds-mt6370-rgb.o
diff --git a/drivers/leds/rgb/leds-mt6370-rgb.c b/drivers/leds/rgb/leds-mt6370-rgb.c
new file mode 100644
index 0000000..42cc13a
--- /dev/null
+++ b/drivers/leds/rgb/leds-mt6370-rgb.c
@@ -0,0 +1,1022 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Authors:
+ *   ChiYuan Huang <cy_huang@richtek.com>
+ *   Alice Chen <alice_chen@richtek.com>
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/linear_range.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/util_macros.h>
+
+#include <asm-generic/unaligned.h>
+
+enum {
+	MT6370_LED_ISNK1 = 0,
+	MT6370_LED_ISNK2,
+	MT6370_LED_ISNK3,
+	MT6370_LED_ISNK4,
+	MT6370_MAX_LEDS
+};
+
+enum mt6370_led_mode {
+	MT6370_LED_PWM_MODE = 0,
+	MT6370_LED_BREATH_MODE,
+	MT6370_LED_REG_MODE,
+	MT6370_LED_MAX_MODE
+};
+
+enum mt6370_led_field {
+	F_RGB_EN = 0,
+	F_CHGIND_EN,
+	F_LED1_CURR,
+	F_LED2_CURR,
+	F_LED3_CURR,
+	F_LED4_CURR,
+	F_LED1_MODE,
+	F_LED2_MODE,
+	F_LED3_MODE,
+	F_LED4_MODE,
+	F_LED1_DUTY,
+	F_LED2_DUTY,
+	F_LED3_DUTY,
+	F_LED4_DUTY,
+	F_LED1_FREQ,
+	F_LED2_FREQ,
+	F_LED3_FREQ,
+	F_LED4_FREQ,
+	F_MAX_FIELDS
+};
+
+enum mt6370_led_ranges {
+	R_LED123_CURR = 0,
+	R_LED4_CURR,
+	R_LED_TRFON,
+	R_LED_TOFF,
+	R_MAX_RANGES
+};
+
+enum mt6370_pattern {
+	P_LED_TR1 = 0,
+	P_LED_TR2,
+	P_LED_TF1,
+	P_LED_TF2,
+	P_LED_TON,
+	P_LED_TOFF,
+	P_MAX_PATTERNS
+};
+
+enum mt6370_state {
+	STATE_OFF = 0,
+	STATE_KEEP,
+	STATE_ON,
+	STATE_MAX
+};
+
+#define MT6370_REG_DEV_INFO			0x100
+#define MT6370_REG_RGB1_DIM			0x182
+#define MT6370_REG_RGB2_DIM			0x183
+#define MT6370_REG_RGB3_DIM			0x184
+#define MT6370_REG_RGB_EN			0x185
+#define MT6370_REG_RGB1_ISNK			0x186
+#define MT6370_REG_RGB2_ISNK			0x187
+#define MT6370_REG_RGB3_ISNK			0x188
+#define MT6370_REG_RGB1_TR			0x189
+#define MT6370_REG_RGB_CHRIND_DIM		0x192
+#define MT6370_REG_RGB_CHRIND_CTRL		0x193
+#define MT6370_REG_RGB_CHRIND_TR		0x194
+
+#define MT6372_REG_RGB_EN			0x182
+#define MT6372_REG_RGB1_ISNK			0x183
+#define MT6372_REG_RGB2_ISNK			0x184
+#define MT6372_REG_RGB3_ISNK			0x185
+#define MT6372_REG_RGB4_ISNK			0x186
+#define MT6372_REG_RGB1_DIM			0x187
+#define MT6372_REG_RGB2_DIM			0x188
+#define MT6372_REG_RGB3_DIM			0x189
+#define MT6372_REG_RGB4_DIM			0x18A
+#define MT6372_REG_RGB12_FREQ			0x18B
+#define MT6372_REG_RGB34_FREQ			0x18C
+#define MT6372_REG_RGB1_TR			0x18D
+
+#define MT6370_VENID_MASK			GENMASK(7, 4)
+#define MT6370_CHEN_BIT(id)			BIT(MT6370_LED_ISNK4 - id)
+#define MT6370_VIRTUAL_MULTICOLOR		5
+#define MC_CHANNEL_NUM				3
+#define MT6370_PWM_DUTY				(BIT(5) - 1)
+#define MT6372_PWM_DUTY				(BIT(8) - 1)
+
+struct mt6370_led {
+	/*
+	 * If the color of the LED in DT is set to
+	 *   - 'LED_COLOR_ID_RGB'
+	 *   - 'LED_COLOR_ID_MULTI'
+	 * The member 'index' of this struct will be set to
+	 * 'MT6370_VIRTUAL_MULTICOLOR'.
+	 * If so, this LED will choose 'struct led_classdev_mc mc' to use.
+	 * Instead, if the member 'index' of this struct is set to
+	 * 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
+	 * 'struct led_classdev isink' to use.
+	 */
+	union {
+		struct led_classdev isink;
+		struct led_classdev_mc mc;
+	};
+	struct mt6370_priv *priv;
+	u32 default_state;
+	u32 index;
+};
+
+struct mt6370_pdata {
+	const unsigned int *tfreq;
+	unsigned int tfreq_len;
+	u8 pwm_duty;
+	u16 reg_rgb1_tr;
+	s16 reg_rgb_chrind_tr;
+};
+
+struct mt6370_priv {
+	/* Per LED access lock */
+	struct mutex lock;
+	struct device *dev;
+	struct regmap *regmap;
+	struct regmap_field *fields[F_MAX_FIELDS];
+	const struct reg_field *reg_fields;
+	const struct linear_range *ranges;
+	struct reg_cfg *reg_cfgs;
+	const struct mt6370_pdata *pdata;
+	unsigned int leds_count;
+	unsigned int leds_active;
+	struct mt6370_led leds[];
+};
+
+static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
+	[F_RGB_EN]	= REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
+	[F_CHGIND_EN]	= REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
+	[F_LED1_CURR]	= REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
+	[F_LED2_CURR]	= REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
+	[F_LED3_CURR]	= REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
+	[F_LED4_CURR]	= REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
+	[F_LED1_MODE]	= REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
+	[F_LED2_MODE]	= REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
+	[F_LED3_MODE]	= REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
+	[F_LED4_MODE]	= REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
+	[F_LED1_DUTY]	= REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
+	[F_LED2_DUTY]	= REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
+	[F_LED3_DUTY]	= REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
+	[F_LED4_DUTY]	= REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
+	[F_LED1_FREQ]	= REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
+	[F_LED2_FREQ]	= REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
+	[F_LED3_FREQ]	= REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
+	[F_LED4_FREQ]	= REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
+};
+
+static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
+	[F_RGB_EN]	= REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
+	[F_CHGIND_EN]	= REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
+	[F_LED1_CURR]	= REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
+	[F_LED2_CURR]	= REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
+	[F_LED3_CURR]	= REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
+	[F_LED4_CURR]	= REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
+	[F_LED1_MODE]	= REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
+	[F_LED2_MODE]	= REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
+	[F_LED3_MODE]	= REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
+	[F_LED4_MODE]	= REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
+	[F_LED1_DUTY]	= REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
+	[F_LED2_DUTY]	= REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
+	[F_LED3_DUTY]	= REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
+	[F_LED4_DUTY]	= REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
+	[F_LED1_FREQ]	= REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
+	[F_LED2_FREQ]	= REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
+	[F_LED3_FREQ]	= REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
+	[F_LED4_FREQ]	= REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
+};
+
+/* Current unit: microamp, time unit: millisecond */
+static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
+	[R_LED123_CURR]	= { 4000, 1, 6, 4000 },
+	[R_LED4_CURR]	= { 2000, 1, 3, 2000 },
+	[R_LED_TRFON]	= { 125, 0, 15, 200 },
+	[R_LED_TOFF]	= { 250, 0, 15, 400 },
+};
+
+static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
+	[R_LED123_CURR]	= { 2000, 1, 14, 2000 },
+	[R_LED4_CURR]	= { 2000, 1, 14, 2000 },
+	[R_LED_TRFON]	= { 125, 0, 15, 250 },
+	[R_LED_TOFF]	= { 250, 0, 15, 500 },
+};
+
+static const unsigned int common_tfreqs[] = {
+	10000, 5000, 2000, 1000, 500, 200, 5, 1,
+};
+
+static const unsigned int mt6372_tfreqs[] = {
+	8000, 4000, 2000, 1000, 500, 250, 8, 4,
+};
+
+static const struct mt6370_pdata common_pdata = {
+	.tfreq = common_tfreqs,
+	.tfreq_len = ARRAY_SIZE(common_tfreqs),
+	.pwm_duty = MT6370_PWM_DUTY,
+	.reg_rgb1_tr = MT6370_REG_RGB1_TR,
+	.reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
+};
+
+static const struct mt6370_pdata mt6372_pdata = {
+	.tfreq = mt6372_tfreqs,
+	.tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
+	.pwm_duty = MT6372_PWM_DUTY,
+	.reg_rgb1_tr = MT6372_REG_RGB1_TR,
+	.reg_rgb_chrind_tr = -1,
+};
+
+static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
+{
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		return F_LED1_CURR;
+	case MT6370_LED_ISNK2:
+		return F_LED2_CURR;
+	case MT6370_LED_ISNK3:
+		return F_LED3_CURR;
+	default:
+		return F_LED4_CURR;
+	}
+}
+
+static int mt6370_set_led_brightness(struct mt6370_priv *priv,
+				     unsigned int led_no, unsigned int level)
+{
+	enum mt6370_led_field sel_field;
+
+	sel_field = mt6370_get_led_current_field(led_no);
+
+	return regmap_field_write(priv->fields[sel_field], level);
+}
+
+static int mt6370_get_led_brightness(struct mt6370_priv *priv,
+				     unsigned int led_no, unsigned int *level)
+{
+	enum mt6370_led_field sel_field;
+
+	sel_field = mt6370_get_led_current_field(led_no);
+
+	return regmap_field_read(priv->fields[sel_field], level);
+}
+
+static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no,
+			       unsigned int ton, unsigned int toff)
+{
+	const struct mt6370_pdata *pdata = priv->pdata;
+	enum mt6370_led_field sel_field;
+	unsigned int divisor, ratio;
+
+	divisor = pdata->pwm_duty;
+	ratio = ton * divisor / (ton + toff);
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		sel_field = F_LED1_DUTY;
+		break;
+	case MT6370_LED_ISNK2:
+		sel_field = F_LED2_DUTY;
+		break;
+	case MT6370_LED_ISNK3:
+		sel_field = F_LED3_DUTY;
+		break;
+	default:
+		sel_field = F_LED4_DUTY;
+		break;
+	}
+
+	return regmap_field_write(priv->fields[sel_field], ratio);
+}
+
+static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no,
+			       unsigned int ton, unsigned int toff)
+{
+	const struct mt6370_pdata *pdata = priv->pdata;
+	enum mt6370_led_field sel_field;
+	unsigned int tfreq_len = pdata->tfreq_len;
+	unsigned int tsum, sel;
+
+	tsum = ton + toff;
+
+	if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
+		return -EOPNOTSUPP;
+
+	sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		sel_field = F_LED1_FREQ;
+		break;
+	case MT6370_LED_ISNK2:
+		sel_field = F_LED2_FREQ;
+		break;
+	case MT6370_LED_ISNK3:
+		sel_field = F_LED3_FREQ;
+		break;
+	default:
+		sel_field = F_LED4_FREQ;
+		break;
+	}
+
+	return regmap_field_write(priv->fields[sel_field], sel);
+}
+
+static void mt6370_get_breath_reg_base(struct mt6370_priv *priv,
+				       unsigned int led_no, unsigned int *base)
+{
+	const struct mt6370_pdata *pdata = priv->pdata;
+
+	if (pdata->reg_rgb_chrind_tr < 0) {
+		*base = pdata->reg_rgb1_tr + led_no * 3;
+		return;
+	}
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+	case MT6370_LED_ISNK2:
+	case MT6370_LED_ISNK3:
+		*base = pdata->reg_rgb1_tr + led_no * 3;
+		break;
+	default:
+		*base = pdata->reg_rgb_chrind_tr;
+		break;
+	}
+}
+
+static int mt6370_gen_breath_pattern(struct mt6370_priv *priv,
+				     struct led_pattern *pattern, u32 len,
+				     u8 *pattern_val, u32 val_len)
+{
+	enum mt6370_led_ranges sel_range;
+	struct led_pattern *curr;
+	unsigned int sel;
+	u32 val = 0;
+	int i;
+
+	if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
+		return -EINVAL;
+
+	/*
+	 * Pattern list
+	 * tr1:	 byte 0, b'[7: 4]
+	 * tr2:	 byte 0, b'[3: 0]
+	 * tf1:	 byte 1, b'[7: 4]
+	 * tf2:	 byte 1, b'[3: 0]
+	 * ton:	 byte 2, b'[7: 4]
+	 * toff: byte 2, b'[3: 0]
+	 */
+	for (i = 0; i < P_MAX_PATTERNS; i++) {
+		curr = pattern + i;
+
+		sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
+
+		linear_range_get_selector_within(priv->ranges + sel_range,
+						 curr->delta_t, &sel);
+
+		val <<= i % 2 == 0 ? 8 : 0;
+		val |= sel << (i % 2 == 0 ? 4 : 0);
+	}
+
+	put_unaligned_be24(val, pattern_val);
+
+	return 0;
+}
+
+static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
+			       enum mt6370_led_mode mode)
+{
+	enum mt6370_led_field sel_field;
+
+	switch (led_no) {
+	case MT6370_LED_ISNK1:
+		sel_field = F_LED1_MODE;
+		break;
+	case MT6370_LED_ISNK2:
+		sel_field = F_LED2_MODE;
+		break;
+	case MT6370_LED_ISNK3:
+		sel_field = F_LED3_MODE;
+		break;
+	default:
+		sel_field = F_LED4_MODE;
+		break;
+	}
+
+	return regmap_field_write(priv->fields[sel_field], mode);
+}
+
+static int mt6370_mc_brightness_set(struct led_classdev *lcdev,
+				    enum led_brightness level)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	unsigned int enable, disable;
+	int i, ret;
+
+	mutex_lock(&priv->lock);
+
+	led_mc_calc_color_components(mccdev, level);
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	disable = enable;
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		u32 brightness;
+
+		subled = mccdev->subled_info + i;
+		brightness = min(subled->brightness, lcdev->max_brightness);
+		disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+		if (level == 0) {
+			enable &= ~MT6370_CHEN_BIT(subled->channel);
+
+			ret = mt6370_set_led_mode(priv, subled->channel,
+						  MT6370_LED_REG_MODE);
+			if (ret)
+				goto out_unlock;
+
+			continue;
+		}
+
+		if (brightness == 0) {
+			enable &= ~MT6370_CHEN_BIT(subled->channel);
+			continue;
+		}
+
+		enable |= MT6370_CHEN_BIT(subled->channel);
+
+		ret = mt6370_set_led_brightness(priv, subled->channel,
+						brightness);
+		if (ret)
+			goto out_unlock;
+	}
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_mc_blink_set(struct led_classdev *lcdev,
+			       unsigned long *delay_on,
+			       unsigned long *delay_off)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	unsigned int enable, disable;
+	int i, ret;
+
+	mutex_lock(&priv->lock);
+
+	if (!*delay_on && !*delay_off)
+		*delay_on = *delay_off = 500;
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	disable = enable;
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		subled = mccdev->subled_info + i;
+
+		disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+		ret = mt6370_set_led_duty(priv, subled->channel, *delay_on,
+					  *delay_off);
+		if (ret)
+			goto out_unlock;
+
+		ret = mt6370_set_led_freq(priv, subled->channel, *delay_on,
+					  *delay_off);
+		if (ret)
+			goto out_unlock;
+
+		ret = mt6370_set_led_mode(priv, subled->channel,
+					  MT6370_LED_PWM_MODE);
+		if (ret)
+			goto out_unlock;
+	}
+
+	/* Toggle to make pattern timing the same */
+	ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_mc_pattern_set(struct led_classdev *lcdev,
+			struct led_pattern *pattern, u32 len, int repeat)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	unsigned int reg_base, enable, disable;
+	u8 params[P_MAX_PATTERNS / 2];
+	int i, ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = mt6370_gen_breath_pattern(priv, pattern, len, params,
+					sizeof(params));
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	disable = enable;
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		subled = mccdev->subled_info + i;
+
+		mt6370_get_breath_reg_base(priv, subled->channel, &reg_base);
+		disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+		ret = regmap_raw_write(priv->regmap, reg_base, params,
+				       sizeof(params));
+		if (ret)
+			goto out_unlock;
+
+		ret = mt6370_set_led_mode(priv, subled->channel,
+					  MT6370_LED_BREATH_MODE);
+		if (ret)
+			goto out_unlock;
+	}
+
+	/* Toggle to make pattern timing be the same */
+	ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+	if (ret)
+		goto out_unlock;
+
+	ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
+{
+	struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+	struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+	struct mt6370_priv *priv = led->priv;
+	struct mc_subled *subled;
+	int i, ret;
+
+	mutex_lock(&led->priv->lock);
+
+	for (i = 0; i < mccdev->num_colors; i++) {
+		subled = mccdev->subled_info + i;
+
+		ret = mt6370_set_led_mode(priv, subled->channel,
+					  MT6370_LED_REG_MODE);
+		if (ret)
+			break;
+	}
+
+	mutex_unlock(&led->priv->lock);
+
+	return ret;
+}
+
+static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
+				      enum led_brightness level)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	unsigned int enable;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		goto out_unlock;
+
+	if (level == 0) {
+		enable &= ~MT6370_CHEN_BIT(led->index);
+
+		ret = mt6370_set_led_mode(priv, led->index,
+					  MT6370_LED_REG_MODE);
+		if (ret)
+			goto out_unlock;
+
+		ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+	} else {
+		enable |= MT6370_CHEN_BIT(led->index);
+
+		ret = mt6370_set_led_brightness(priv, led->index, level);
+		if (ret)
+			goto out_unlock;
+
+		ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+	}
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_isnk_blink_set(struct led_classdev *lcdev,
+				 unsigned long *delay_on,
+				 unsigned long *delay_off)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	if (!*delay_on && !*delay_off)
+		*delay_on = *delay_off = 500;
+
+	ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
+	if (ret)
+		goto out_unlock;
+
+	ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
+	if (ret)
+		goto out_unlock;
+
+	ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_isnk_pattern_set(struct led_classdev *lcdev,
+				   struct led_pattern *pattern, u32 len,
+				   int repeat)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	unsigned int reg_base;
+	u8 params[P_MAX_PATTERNS / 2];
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	ret = mt6370_gen_breath_pattern(priv, pattern, len, params,
+					sizeof(params));
+	if (ret)
+		goto out_unlock;
+
+	mt6370_get_breath_reg_base(priv, led->index, &reg_base);
+
+	ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
+	if (ret)
+		goto out_unlock;
+
+	ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
+
+out_unlock:
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
+{
+	struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+	struct mt6370_priv *priv = led->priv;
+	int ret;
+
+	mutex_lock(&led->priv->lock);
+	ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
+	mutex_unlock(&led->priv->lock);
+
+	return ret;
+}
+
+static int mt6370_init_led_properties(struct mt6370_led *led,
+				      struct led_init_data *init_data)
+{
+	struct mt6370_priv *priv = led->priv;
+	struct device *dev = priv->dev;
+	struct led_classdev *lcdev;
+	struct fwnode_handle *child;
+	enum mt6370_led_ranges sel_range;
+	u32 max_uA, max_level;
+	const char * const states[] = { "off", "keep", "on" };
+	const char *stat_str;
+	int ret;
+
+	if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+		struct mc_subled *sub_led;
+		u32 num_color = 0;
+
+		sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led),
+				       GFP_KERNEL);
+		if (!sub_led)
+			return -ENOMEM;
+
+		fwnode_for_each_child_node(init_data->fwnode, child) {
+			u32 reg, color;
+
+			ret = fwnode_property_read_u32(child, "reg", &reg);
+			if (ret || reg > MT6370_LED_ISNK3 ||
+			    priv->leds_active & BIT(reg))
+				return -EINVAL;
+
+			ret = fwnode_property_read_u32(child, "color", &color);
+			if (ret)
+				return dev_err_probe(dev, ret,
+						     "LED %d, no color specified\n",
+						     led->index);
+
+			priv->leds_active |= BIT(reg);
+			sub_led[num_color].color_index = color;
+			sub_led[num_color].channel = reg;
+			sub_led[num_color].intensity = 0;
+			num_color++;
+		}
+
+		if (num_color < 2)
+			return dev_err_probe(dev, -EINVAL,
+					     "Multicolor must include 2 or more LED channels\n");
+
+		led->mc.num_colors = num_color;
+		led->mc.subled_info = sub_led;
+
+		lcdev = &led->mc.led_cdev;
+		lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
+		lcdev->blink_set = mt6370_mc_blink_set;
+		lcdev->pattern_set = mt6370_mc_pattern_set;
+		lcdev->pattern_clear = mt6370_mc_pattern_clear;
+	} else {
+		lcdev = &led->isink;
+		lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
+		lcdev->blink_set = mt6370_isnk_blink_set;
+		lcdev->pattern_set = mt6370_isnk_pattern_set;
+		lcdev->pattern_clear = mt6370_isnk_pattern_clear;
+	}
+
+	ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
+				       &max_uA);
+	if (ret) {
+		dev_warn(dev,
+			 "Not specified led-max-microamp, config to the minimum\n");
+		max_uA = 0;
+	}
+
+	if (led->index == MT6370_LED_ISNK4)
+		sel_range = R_LED4_CURR;
+	else
+		sel_range = R_LED123_CURR;
+
+	linear_range_get_selector_within(priv->ranges + sel_range, max_uA,
+					 &max_level);
+
+	lcdev->max_brightness = max_level;
+
+	fwnode_property_read_string(init_data->fwnode, "linux,default-trigger",
+				    &lcdev->default_trigger);
+
+	ret = fwnode_property_read_string(init_data->fwnode, "default-state",
+					  &stat_str);
+	if (!ret) {
+		ret = match_string(states, ARRAY_SIZE(states), stat_str);
+		if (ret < 0)
+			ret = STATE_OFF;
+
+		led->default_state = ret;
+	}
+
+	return 0;
+}
+
+static int mt6370_isnk_init_default_state(struct mt6370_led *led)
+{
+	struct mt6370_priv *priv = led->priv;
+	unsigned int enable, level;
+	int ret;
+
+	ret = mt6370_get_led_brightness(priv, led->index, &level);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+	if (ret)
+		return ret;
+
+	if (!(enable & MT6370_CHEN_BIT(led->index)))
+		level = 0;
+
+	switch (led->default_state) {
+	case STATE_ON:
+		led->isink.brightness = led->isink.max_brightness;
+		break;
+	case STATE_KEEP:
+		led->isink.brightness = min(level, led->isink.max_brightness);
+		break;
+	default:
+		led->isink.brightness = 0;
+		break;
+	}
+
+	return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
+}
+
+static int mt6370_led_register(struct device *parent, struct mt6370_led *led,
+			       struct led_init_data *init_data)
+{
+	struct mt6370_priv *priv = led->priv;
+	int ret;
+
+	if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+		ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
+		if (ret)
+			return dev_err_probe(parent, ret,
+					     "Couldn't set multicolor brightness\n");
+
+		ret = devm_led_classdev_multicolor_register_ext(parent,
+								&led->mc,
+								init_data);
+		if (ret)
+			return dev_err_probe(parent, ret,
+					     "Couldn't register multicolor\n");
+	} else {
+		if (led->index == MT6370_LED_ISNK4) {
+			ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
+			if (ret)
+				return dev_err_probe(parent, ret,
+						     "Failed to set CHRIND to SW\n");
+		}
+
+		ret = mt6370_isnk_init_default_state(led);
+		if (ret)
+			return dev_err_probe(parent, ret,
+					     "Failed to init %d isnk state\n",
+					     led->index);
+
+		ret = devm_led_classdev_register_ext(parent, &led->isink,
+						     init_data);
+		if (ret)
+			return dev_err_probe(parent, ret,
+					     "Couldn't register isink %d\n",
+					     led->index);
+	}
+
+	return 0;
+}
+
+static int mt6370_check_vendor_info(struct mt6370_priv *priv)
+{
+	unsigned int devinfo, vid;
+	int ret;
+
+	ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
+	if (ret)
+		return ret;
+
+	vid = FIELD_GET(MT6370_VENID_MASK, devinfo);
+	if (vid == 0x9 || vid == 0xb) {
+		priv->reg_fields = mt6372_reg_fields;
+		priv->ranges = mt6372_led_ranges;
+		priv->pdata = &mt6372_pdata;
+	} else {
+		/* Common for MT6370/71 */
+		priv->reg_fields = common_reg_fields;
+		priv->ranges = common_led_ranges;
+		priv->pdata = &common_pdata;
+	}
+
+	return 0;
+}
+
+static int mt6370_leds_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mt6370_priv *priv;
+	struct fwnode_handle *child;
+	size_t count;
+	unsigned int i = 0;
+	int ret;
+
+	count = device_get_child_node_count(dev);
+	if (!count || count > MT6370_MAX_LEDS)
+		return dev_err_probe(dev, -EINVAL,
+				     "No child node or node count over max LED number %zu\n",
+				      count);
+
+	priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->leds_count = count;
+	priv->dev = dev;
+	mutex_init(&priv->lock);
+
+	priv->regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+	ret = mt6370_check_vendor_info(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+	ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields,
+					   priv->reg_fields, F_MAX_FIELDS);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
+
+	device_for_each_child_node(dev, child) {
+		struct mt6370_led *led = priv->leds + i++;
+		struct led_init_data init_data = { .fwnode = child };
+		u32 reg, color;
+
+		ret = fwnode_property_read_u32(child, "reg", &reg);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to parse reg property\n");
+
+		if (reg >= MT6370_MAX_LEDS)
+			return dev_err_probe(dev, -EINVAL, "Error reg property number\n");
+
+		ret = fwnode_property_read_u32(child, "color", &color);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to parse color property\n");
+
+		if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
+			reg = MT6370_VIRTUAL_MULTICOLOR;
+
+		if (priv->leds_active & BIT(reg))
+			return dev_err_probe(dev, -EINVAL, "Duplicate reg property\n");
+
+		priv->leds_active |= BIT(reg);
+
+		led->index = reg;
+		led->priv = priv;
+
+		ret = mt6370_init_led_properties(led, &init_data);
+		if (ret)
+			return ret;
+
+		ret = mt6370_led_register(&pdev->dev, led, &init_data);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id mt6370_rgbled_device_table[] = {
+	{ .compatible = "mediatek,mt6370-indicator" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
+
+static struct platform_driver mt6370_rgbled_driver = {
+	.driver = {
+		.name = "mt6370-indicator",
+		.of_match_table = mt6370_rgbled_device_table,
+	},
+	.probe = mt6370_leds_probe,
+};
+module_platform_driver(mt6370_rgbled_driver);
+
+MODULE_AUTHOR("Alice Chen <alice_chen@richtek.com>");
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[PATCH v7 12/13] leds: flash: mt6370: Add MediaTek MT6370 flashlight support

[ChiaEn Wu]

From: Alice Chen <alice_chen@richtek.com>

The MediaTek MT6370 is a highly-integrated smart power management IC,
which includes a single cell Li-Ion/Li-Polymer switching battery
charger, a USB Type-C & Power Delivery (PD) controller, dual Flash
LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

Add a support for the MT6370 Flash LED driver. Flash LED in MT6370
has 2 channels and support torch/strobe mode.

Signed-off-by: Alice Chen <alice_chen@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Fix the indentation.
- For the well defined macro, the parenthesis is needed for input parameters.
- Replace some dev_warn to dev_info in 'init_flash_properties'.
- Add sentinel comment for the terminator entry of of_device_id.
- Use priv->fled_torch_used directly.
- Delete 0 in {}.
- Use _uA instead of _UA in definition.
- Refine the description.
- Use usleep_range instead of udelay.
- Rename config to LEDS_MT6370_FLASH.
- Add missing ">" in copyright.
- Change the Kconfig order
---
 drivers/leds/flash/Kconfig             |  12 +
 drivers/leds/flash/Makefile            |   1 +
 drivers/leds/flash/leds-mt6370-flash.c | 632 +++++++++++++++++++++++++++++++++
 3 files changed, 645 insertions(+)
 create mode 100644 drivers/leds/flash/leds-mt6370-flash.c

diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig
index d3eb689..4b1afc1 100644
--- a/drivers/leds/flash/Kconfig
+++ b/drivers/leds/flash/Kconfig
@@ -61,6 +61,18 @@ config LEDS_MT6360
 	  Independent current sources supply for each flash LED support torch
 	  and strobe mode.
 
+config LEDS_MT6370_FLASH
+	tristate "Flash LED Support for MediaTek MT6370 PMIC"
+	depends on LEDS_CLASS
+	depends on MFD_MT6370
+	help
+	  Support 2 channels and torch/strobe mode.
+	  Say Y here to enable support for
+	  MT6370_FLASH_LED device.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "leds-mt6370-flash".
+
 config LEDS_RT4505
 	tristate "LED support for RT4505 flashlight controller"
 	depends on I2C && OF
diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile
index 0acbddc..0c1f3c5 100644
--- a/drivers/leds/flash/Makefile
+++ b/drivers/leds/flash/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_LEDS_MAX77693)	+= leds-max77693.o
 obj-$(CONFIG_LEDS_RT4505)	+= leds-rt4505.o
 obj-$(CONFIG_LEDS_RT8515)	+= leds-rt8515.o
 obj-$(CONFIG_LEDS_SGM3140)	+= leds-sgm3140.o
+obj-$(CONFIG_LEDS_MT6370_FLASH)	+= leds-mt6370-flash.o
diff --git a/drivers/leds/flash/leds-mt6370-flash.c b/drivers/leds/flash/leds-mt6370-flash.c
new file mode 100644
index 0000000..e36e264
--- /dev/null
+++ b/drivers/leds/flash/leds-mt6370-flash.c
@@ -0,0 +1,632 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: Alice Chen <alice_chen@richtek.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+enum {
+	MT6370_LED_FLASH1,
+	MT6370_LED_FLASH2,
+	MT6370_MAX_LEDS
+};
+
+/* Virtual definition for multicolor */
+
+#define MT6370_REG_FLEDEN		0x17E
+#define MT6370_REG_STRBTO		0x173
+#define MT6370_REG_CHGSTAT2		0x1D1
+#define MT6370_REG_FLEDSTAT1		0x1D9
+#define MT6370_REG_FLEDISTRB(_id)	(0x174 + 4 * (_id))
+#define MT6370_REG_FLEDITOR(_id)	(0x175 + 4 * (_id))
+#define MT6370_ITORCH_MASK		GENMASK(4, 0)
+#define MT6370_ISTROBE_MASK		GENMASK(6, 0)
+#define MT6370_STRBTO_MASK		GENMASK(6, 0)
+#define MT6370_TORCHEN_MASK		BIT(3)
+#define MT6370_STROBEN_MASK		BIT(2)
+#define MT6370_FLCSEN_MASK(_id)		BIT(MT6370_LED_FLASH2 - (_id))
+#define MT6370_FLCSEN_MASK_ALL		GENMASK(1, 0)
+#define MT6370_FLEDCHGVINOVP_MASK	BIT(3)
+#define MT6370_FLED1STRBTO_MASK		BIT(11)
+#define MT6370_FLED2STRBTO_MASK		BIT(10)
+#define MT6370_FLED1STRB_MASK		BIT(9)
+#define MT6370_FLED2STRB_MASK		BIT(8)
+#define MT6370_FLED1SHORT_MASK		BIT(7)
+#define MT6370_FLED2SHORT_MASK		BIT(6)
+#define MT6370_FLEDLVF_MASK		BIT(3)
+
+#define MT6370_LED_JOINT		2
+#define MT6370_RANGE_FLED_REG		4
+#define MT6370_ITORCH_MIN_uA		25000
+#define MT6370_ITORCH_STEP_uA		12500
+#define MT6370_ITORCH_MAX_uA		400000
+#define MT6370_ITORCH_DOUBLE_MAX_uA	800000
+#define MT6370_ISTRB_MIN_uA		50000
+#define MT6370_ISTRB_STEP_uA		12500
+#define MT6370_ISTRB_MAX_uA		1500000
+#define MT6370_ISTRB_DOUBLE_MAX_uA	3000000
+#define MT6370_STRBTO_MIN_US		64000
+#define MT6370_STRBTO_STEP_US		32000
+#define MT6370_STRBTO_MAX_US		2432000
+
+#define STATE_OFF			0
+#define STATE_KEEP			1
+#define STATE_ON			2
+
+#define to_mt6370_led(ptr, member) container_of(ptr, struct mt6370_led, member)
+
+struct mt6370_led {
+	struct led_classdev_flash flash;
+	struct v4l2_flash *v4l2_flash;
+	struct mt6370_priv *priv;
+	u32 led_no;
+	u32 default_state;
+};
+
+struct mt6370_priv {
+	struct device *dev;
+	struct regmap *regmap;
+	struct mutex lock;
+	unsigned int fled_strobe_used;
+	unsigned int fled_torch_used;
+	unsigned int leds_active;
+	unsigned int leds_count;
+	struct mt6370_led leds[];
+};
+
+static int mt6370_torch_brightness_set(struct led_classdev *lcdev,
+				       enum led_brightness level)
+{
+	struct mt6370_led *led = to_mt6370_led(lcdev, flash.led_cdev);
+	struct mt6370_priv *priv = led->priv;
+	u32 led_enable_mask = (led->led_no == MT6370_LED_JOINT) ?
+			      MT6370_FLCSEN_MASK_ALL :
+			      MT6370_FLCSEN_MASK(led->led_no);
+	u32 enable_mask = MT6370_TORCHEN_MASK | led_enable_mask;
+	u32 val = level ? led_enable_mask : 0;
+	u32 curr;
+	int ret, i;
+
+	mutex_lock(&priv->lock);
+
+	/*
+	 * Only one set of flash control logic,
+	 * use the flag to avoid strobe is currently used.
+	 */
+	if (priv->fled_strobe_used) {
+		dev_warn(lcdev->dev, "Please disable strobe first [%d]\n",
+			 priv->fled_strobe_used);
+		ret = -EBUSY;
+		goto unlock;
+	}
+
+	if (level)
+		curr = priv->fled_torch_used | BIT(led->led_no);
+	else
+		curr = priv->fled_torch_used & ~BIT(led->led_no);
+
+	if (curr)
+		val |= MT6370_TORCHEN_MASK;
+
+	if (level) {
+		level -= 1;
+		if (led->led_no == MT6370_LED_JOINT) {
+			int flevel[MT6370_MAX_LEDS];
+
+			flevel[0] = level / 2;
+			flevel[1] = level - flevel[0];
+			for (i = 0; i < MT6370_MAX_LEDS; i++) {
+				ret = regmap_update_bits(priv->regmap,
+						MT6370_REG_FLEDITOR(i),
+						MT6370_ITORCH_MASK, flevel[i]);
+				if (ret)
+					goto unlock;
+			}
+		} else {
+			ret = regmap_update_bits(priv->regmap,
+					MT6370_REG_FLEDITOR(led->led_no),
+					MT6370_ITORCH_MASK, level);
+			if (ret)
+				goto unlock;
+		}
+	}
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN,
+				 enable_mask, val);
+	if (ret)
+		goto unlock;
+
+	priv->fled_torch_used = curr;
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static int mt6370_flash_brightness_set(struct led_classdev_flash *fl_cdev,
+				       u32 brightness)
+{
+	/*
+	 * Due to the current spike when turning on flash,
+	 * let brightness be kept by the framework.
+	 * This empty function is used to
+	 * prevent led_classdev_flash register ops check failure.
+	 */
+	return 0;
+}
+
+static int _mt6370_flash_brightness_set(struct led_classdev_flash *fl_cdev,
+					u32 brightness)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	struct led_flash_setting *s = &fl_cdev->brightness;
+	u32 val = (brightness - s->min) / s->step;
+	int ret, i;
+
+	if (led->led_no == MT6370_LED_JOINT) {
+		int flevel[MT6370_MAX_LEDS];
+
+		flevel[0] = val / 2;
+		flevel[1] = val - flevel[0];
+		for (i = 0; i < MT6370_MAX_LEDS; i++) {
+			ret = regmap_update_bits(priv->regmap,
+						 MT6370_REG_FLEDISTRB(i),
+						 MT6370_ISTROBE_MASK, flevel[i]);
+			if (ret)
+				return ret;
+		}
+	} else {
+		return regmap_update_bits(priv->regmap,
+					  MT6370_REG_FLEDISTRB(led->led_no),
+					  MT6370_ISTROBE_MASK, val);
+	}
+
+	return 0;
+}
+
+static int mt6370_strobe_set(struct led_classdev_flash *fl_cdev, bool state)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	struct led_classdev *lcdev = &fl_cdev->led_cdev;
+	struct led_flash_setting *s = &fl_cdev->brightness;
+	u32 led_enable_mask = (led->led_no == MT6370_LED_JOINT) ?
+			      MT6370_FLCSEN_MASK_ALL :
+			      MT6370_FLCSEN_MASK(led->led_no);
+	u32 enable_mask = MT6370_STROBEN_MASK | led_enable_mask;
+	u32 val = state ? led_enable_mask : 0;
+	u32 curr;
+	int ret;
+
+	mutex_lock(&priv->lock);
+
+	/*
+	 * Only one set of flash control logic,
+	 * use the flag to avoid torch is currently used
+	 */
+	if (priv->fled_torch_used) {
+		dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n",
+				      priv->fled_torch_used);
+		ret = -EBUSY;
+		goto unlock;
+	}
+
+	if (state)
+		curr = priv->fled_strobe_used | BIT(led->led_no);
+	else
+		curr = priv->fled_strobe_used & ~BIT(led->led_no);
+
+	if (curr)
+		val |= MT6370_STROBEN_MASK;
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, enable_mask,
+				 val);
+	if (ret) {
+		dev_err(lcdev->dev, "[%d] control current source %d fail\n",
+				     led->led_no, state);
+		goto unlock;
+	}
+
+	/*
+	 * If the flash needs to be on,
+	 * config the flash current ramping up to the setting value.
+	 * Else, always recover back to the minimum one.
+	 */
+	ret = _mt6370_flash_brightness_set(fl_cdev, state ? s->val : s->min);
+	if (ret)
+		goto unlock;
+
+	/*
+	 * For the flash to turn on/off, we need to wait HW ramping up/down time
+	 * 5ms/500us to prevent the unexpected problem.
+	 */
+	if (!priv->fled_strobe_used && curr)
+		usleep_range(5000, 6000);
+	else if (priv->fled_strobe_used && !curr)
+		usleep_range(500, 600);
+
+	priv->fled_strobe_used = curr;
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static int mt6370_strobe_get(struct led_classdev_flash *fl_cdev, bool *state)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+
+	mutex_lock(&priv->lock);
+	*state = !!(priv->fled_strobe_used & BIT(led->led_no));
+	mutex_unlock(&priv->lock);
+
+	return 0;
+}
+
+static int mt6370_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	struct led_flash_setting *s = &fl_cdev->timeout;
+	u32 val = (timeout - s->min) / s->step;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_STRBTO,
+				 MT6370_STRBTO_MASK, val);
+	mutex_unlock(&priv->lock);
+
+	return ret;
+}
+
+static int mt6370_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
+{
+	struct mt6370_led *led = to_mt6370_led(fl_cdev, flash);
+	struct mt6370_priv *priv = led->priv;
+	u16 fled_stat;
+	unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
+	u32 rfault = 0;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_read(priv->regmap, MT6370_REG_CHGSTAT2, &chg_stat);
+	if (ret)
+		goto unlock;
+
+	ret = regmap_raw_read(priv->regmap, MT6370_REG_FLEDSTAT1, &fled_stat,
+			      sizeof(fled_stat));
+	if (ret)
+		goto unlock;
+
+	switch (led->led_no) {
+	case MT6370_LED_FLASH1:
+		strobe_timeout_mask = MT6370_FLED1STRBTO_MASK;
+		fled_short_mask = MT6370_FLED1SHORT_MASK;
+		break;
+
+	case MT6370_LED_FLASH2:
+		strobe_timeout_mask = MT6370_FLED2STRBTO_MASK;
+		fled_short_mask = MT6370_FLED2SHORT_MASK;
+		break;
+
+	case MT6370_LED_JOINT:
+		strobe_timeout_mask = MT6370_FLED1STRBTO_MASK |
+				      MT6370_FLED2STRBTO_MASK;
+		fled_short_mask = MT6370_FLED1SHORT_MASK |
+				  MT6370_FLED2SHORT_MASK;
+	}
+
+	if (chg_stat & MT6370_FLEDCHGVINOVP_MASK)
+		rfault |= LED_FAULT_INPUT_VOLTAGE;
+
+	if (fled_stat & strobe_timeout_mask)
+		rfault |= LED_FAULT_TIMEOUT;
+
+	if (fled_stat & fled_short_mask)
+		rfault |= LED_FAULT_SHORT_CIRCUIT;
+
+	if (fled_stat & MT6370_FLEDLVF_MASK)
+		rfault |= LED_FAULT_UNDER_VOLTAGE;
+
+	*fault = rfault;
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static const struct led_flash_ops mt6370_flash_ops = {
+	.flash_brightness_set = mt6370_flash_brightness_set,
+	.strobe_set = mt6370_strobe_set,
+	.strobe_get = mt6370_strobe_get,
+	.timeout_set = mt6370_timeout_set,
+	.fault_get = mt6370_fault_get,
+};
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int mt6370_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
+					    bool enable)
+{
+	struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
+	struct mt6370_led *led = to_mt6370_led(flash, flash);
+	struct mt6370_priv *priv = led->priv;
+	u32 mask = (led->led_no == MT6370_LED_JOINT) ? MT6370_FLCSEN_MASK_ALL :
+		   MT6370_FLCSEN_MASK(led->led_no);
+	u32 val = enable ? mask : 0;
+	int ret;
+
+	mutex_lock(&priv->lock);
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_FLEDEN, mask, val);
+	if (ret)
+		goto unlock;
+
+	if (enable)
+		priv->fled_strobe_used |= BIT(led->led_no);
+	else
+		priv->fled_strobe_used &= ~BIT(led->led_no);
+
+unlock:
+	mutex_unlock(&priv->lock);
+	return ret;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+	.external_strobe_set = mt6370_flash_external_strobe_set,
+};
+
+static void mt6370_init_v4l2_flash_config(struct mt6370_led *led,
+					  struct v4l2_flash_config *config)
+{
+	struct led_classdev *lcdev;
+	struct led_flash_setting *s = &config->intensity;
+
+	lcdev = &led->flash.led_cdev;
+
+	s->min = MT6370_ITORCH_MIN_uA;
+	s->step = MT6370_ITORCH_STEP_uA;
+	s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step;
+
+	config->has_external_strobe = 1;
+	strscpy(config->dev_name, lcdev->dev->kobj.name,
+		sizeof(config->dev_name));
+
+	config->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT |
+			       LED_FAULT_INPUT_VOLTAGE |
+			       LED_FAULT_UNDER_VOLTAGE;
+}
+#else
+static const struct v4l2_flash_ops v4l2_flash_ops;
+static void mt6370_init_v4l2_flash_config(struct mt6370_led *led,
+					  struct v4l2_flash_config *config)
+{
+}
+#endif
+
+static void mt6370_v4l2_flash_release(void *v4l2_flash)
+{
+	v4l2_flash_release(v4l2_flash);
+}
+
+static int mt6370_led_register(struct device *parent, struct mt6370_led *led,
+				struct led_init_data *init_data)
+{
+	struct v4l2_flash_config v4l2_config = {};
+	int ret;
+
+	ret = devm_led_classdev_flash_register_ext(parent, &led->flash,
+						   init_data);
+	if (ret)
+		return dev_err_probe(parent, ret,
+				     "Couldn't register flash %d\n", led->led_no);
+
+	mt6370_init_v4l2_flash_config(led, &v4l2_config);
+	led->v4l2_flash = v4l2_flash_init(parent, init_data->fwnode,
+					  &led->flash, &v4l2_flash_ops,
+					  &v4l2_config);
+	if (IS_ERR(led->v4l2_flash))
+		return dev_err_probe(parent, PTR_ERR(led->v4l2_flash),
+				     "Failed to register %d v4l2 sd\n", led->led_no);
+
+	return devm_add_action_or_reset(parent, mt6370_v4l2_flash_release,
+					led->v4l2_flash);
+}
+
+static u32 mt6370_clamp(u32 val, u32 min, u32 max, u32 step)
+{
+	u32 retval;
+
+	retval = clamp_val(val, min, max);
+	if (step > 1)
+		retval = rounddown(retval - min, step) + min;
+
+	return retval;
+}
+
+static int mt6370_init_flash_properties(struct mt6370_led *led,
+					struct led_init_data *init_data)
+{
+	struct led_classdev_flash *flash = &led->flash;
+	struct led_classdev *lcdev = &flash->led_cdev;
+	struct mt6370_priv *priv = led->priv;
+	struct led_flash_setting *s;
+	u32 sources[MT6370_MAX_LEDS];
+	u32 max_uA, val;
+	int i, ret, num;
+
+	num = fwnode_property_count_u32(init_data->fwnode, "led-sources");
+	if (num < 1 || num > MT6370_MAX_LEDS)
+		return dev_err_probe(priv->dev, -EINVAL,
+				     "Not specified or wrong number of led-sources\n");
+
+	ret = fwnode_property_read_u32_array(init_data->fwnode, "led-sources", sources, num);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < num; i++) {
+		if (sources[i] >= MT6370_MAX_LEDS)
+			return -EINVAL;
+		if (priv->leds_active & BIT(sources[i]))
+			return -EINVAL;
+		priv->leds_active |= BIT(sources[i]);
+
+	}
+	led->led_no = (num == MT6370_MAX_LEDS) ? MT6370_LED_JOINT :
+		       sources[0];
+
+	max_uA = (num == 2) ? MT6370_ITORCH_DOUBLE_MAX_uA : MT6370_ITORCH_MAX_uA;
+	ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &val);
+	if (ret) {
+		dev_info(priv->dev,
+			 "Not specified led-max-microamp, config to the minimum\n");
+		val = MT6370_ITORCH_MIN_uA;
+	} else {
+		val = mt6370_clamp(val, MT6370_ITORCH_MIN_uA, max_uA,
+				  MT6370_ITORCH_STEP_uA);
+	}
+
+	lcdev->max_brightness = (val - MT6370_ITORCH_MIN_uA) /
+				MT6370_ITORCH_STEP_uA + 1;
+	lcdev->brightness_set_blocking = mt6370_torch_brightness_set;
+	lcdev->flags |= LED_DEV_CAP_FLASH;
+
+	max_uA = (num == 2) ? MT6370_ISTRB_DOUBLE_MAX_uA : MT6370_ISTRB_MAX_uA;
+	ret = fwnode_property_read_u32(init_data->fwnode, "flash-max-microamp", &val);
+	if (ret) {
+		dev_info(priv->dev,
+		   "Not specified flash-max-microamp, config to the minimum\n");
+		val = MT6370_ISTRB_MIN_uA;
+	} else {
+		val = mt6370_clamp(val, MT6370_ISTRB_MIN_uA, max_uA,
+				  MT6370_ISTRB_STEP_uA);
+	}
+
+	s = &flash->brightness;
+	s->min = MT6370_ISTRB_MIN_uA;
+	s->step = MT6370_ISTRB_STEP_uA;
+	s->val = s->max = val;
+
+	/*
+	 * Always configure as min level when off to
+	 * prevent flash current spike
+	 */
+	ret = _mt6370_flash_brightness_set(flash, s->min);
+	if (ret)
+		return ret;
+
+	ret = fwnode_property_read_u32(init_data->fwnode,
+				       "flash-max-timeout-us", &val);
+	if (ret) {
+		dev_info(priv->dev,
+			 "Not specified flash-max-timeout-us, config to the minimum\n");
+		val = MT6370_STRBTO_MIN_US;
+	} else {
+		val = mt6370_clamp(val, MT6370_STRBTO_MIN_US,
+				   MT6370_STRBTO_MAX_US, MT6370_STRBTO_STEP_US);
+	}
+
+	s = &flash->timeout;
+	s->min = MT6370_STRBTO_MIN_US;
+	s->step = MT6370_STRBTO_STEP_US;
+	s->val = s->max = val;
+
+	flash->ops = &mt6370_flash_ops;
+
+	return 0;
+}
+
+static int mt6370_init_common_properties(struct mt6370_led *led,
+					 struct led_init_data *init_data)
+{
+	const char * const states[] = { "off", "keep", "on" };
+	const char *str = states[STATE_OFF];
+	int ret;
+
+	fwnode_property_read_string(init_data->fwnode, "default-state", &str);
+	ret = match_string(states, ARRAY_SIZE(states), str);
+	if (ret >= 0)
+		led->default_state = ret;
+
+	return 0;
+}
+
+static int mt6370_led_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mt6370_priv *priv;
+	struct fwnode_handle *child;
+	size_t count;
+	int i = 0, ret;
+
+	count = device_get_child_node_count(dev);
+	if (!count || count > MT6370_MAX_LEDS)
+		return dev_err_probe(dev, -EINVAL,
+		       "No child node or node count over max led number %zu\n", count);
+
+	priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->leds_count = count;
+	priv->dev = dev;
+	mutex_init(&priv->lock);
+
+	priv->regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+	device_for_each_child_node(dev, child) {
+		struct mt6370_led *led = priv->leds + i;
+		struct led_init_data init_data = { .fwnode = child, };
+
+		led->priv = priv;
+		ret = mt6370_init_common_properties(led, &init_data);
+		if (ret)
+			return ret;
+
+		ret = mt6370_init_flash_properties(led, &init_data);
+		if (ret)
+			return ret;
+
+		ret = mt6370_led_register(dev, led, &init_data);
+		if (ret)
+			return ret;
+
+		i++;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id mt6370_led_of_id[] = {
+	{ .compatible = "mediatek,mt6370-flashlight" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt6370_led_of_id);
+
+static struct platform_driver mt6370_led_driver = {
+	.driver = {
+		.name = "mt6370-flashlight",
+		.of_match_table = mt6370_led_of_id,
+	},
+	.probe = mt6370_led_probe,
+};
+module_platform_driver(mt6370_led_driver);
+
+MODULE_AUTHOR("Alice Chen <alice_chen@richtek.com>");
+MODULE_DESCRIPTION("MT6370 FLASH LED Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[PATCH v7 13/13] video: backlight: mt6370: Add MediaTek MT6370 support

[ChiaEn Wu]

From: ChiaEn Wu <chiaen_wu@richtek.com>

MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
driver, display bias voltage supply, one general purpose LDO, and the
USB Type-C & PD controller complies with the latest USB Type-C and PD
standards.

Add a support for the MediaTek MT6370 backlight driver.
It controls 4 channels of 8 series WLEDs in
2048 (only for MT6370/MT6371) / 16384 (only for MT6372)
current steps (30 mA) in exponential or linear mapping curves.

Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v7
- Add support 'exponential mode' property parsing
- Add 'return dev_err_probe()' after 'if (IS_ERR(priv->enable_gpio))'
- Add 'mt6372' compatible string
- Revise Kconfig help text
- Revise update()/get() for supporting 16384 steps (MT6372)
- Revise all shift usages form using 'ffs() and fls()' to defining the
  _SHIFT macros.
- Revise 'brightness ? 1 : 0' to '!!brightness' in gpiod_set_value()
---
 drivers/video/backlight/Kconfig            |  13 ++
 drivers/video/backlight/Makefile           |   1 +
 drivers/video/backlight/mt6370-backlight.c | 351 +++++++++++++++++++++++++++++
 3 files changed, 365 insertions(+)
 create mode 100644 drivers/video/backlight/mt6370-backlight.c

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index a003e02..936ba1e 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -268,6 +268,19 @@ config BACKLIGHT_MAX8925
 	  If you have a LCD backlight connected to the WLED output of MAX8925
 	  WLED output, say Y here to enable this driver.
 
+config BACKLIGHT_MT6370
+	tristate "MediaTek MT6370 Backlight Driver"
+	depends on MFD_MT6370
+	help
+	  This enables support for Mediatek MT6370 Backlight driver.
+	  It's commonly used to drive the display WLED. There are 4 channels
+	  inside, and each channel supports up to 30mA of current capability
+	  with 2048 current steps (only for MT6370/MT6371) or 16384 current
+	  steps (only for MT6372) in exponential or linear mapping curves.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "mt6370-backlight".
+
 config BACKLIGHT_APPLE
 	tristate "Apple Backlight Driver"
 	depends on X86 && ACPI
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index cae2c83..e815f3f 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_BACKLIGHT_LP855X)		+= lp855x_bl.o
 obj-$(CONFIG_BACKLIGHT_LP8788)		+= lp8788_bl.o
 obj-$(CONFIG_BACKLIGHT_LV5207LP)	+= lv5207lp.o
 obj-$(CONFIG_BACKLIGHT_MAX8925)		+= max8925_bl.o
+obj-$(CONFIG_BACKLIGHT_MT6370)		+= mt6370-backlight.o
 obj-$(CONFIG_BACKLIGHT_OMAP1)		+= omap1_bl.o
 obj-$(CONFIG_BACKLIGHT_PANDORA)		+= pandora_bl.o
 obj-$(CONFIG_BACKLIGHT_PCF50633)	+= pcf50633-backlight.o
diff --git a/drivers/video/backlight/mt6370-backlight.c b/drivers/video/backlight/mt6370-backlight.c
new file mode 100644
index 0000000..4c889b4
--- /dev/null
+++ b/drivers/video/backlight/mt6370-backlight.c
@@ -0,0 +1,351 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiaEn Wu <chiaen_wu@richtek.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/minmax.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MT6370_REG_DEV_INFO		0x100
+#define MT6370_REG_BL_EN		0x1A0
+#define MT6370_REG_BL_BSTCTRL		0x1A1
+#define MT6370_REG_BL_PWM		0x1A2
+#define MT6370_REG_BL_DIM2		0x1A4
+
+#define MT6370_VENID_MASK		GENMASK(7, 4)
+#define MT6370_BL_EXT_EN_MASK		BIT(7)
+#define MT6370_BL_EN_MASK		BIT(6)
+#define MT6370_BL_CODE_MASK		BIT(0)
+#define MT6370_BL_CH_MASK		GENMASK(5, 2)
+#define MT6370_BL_CH_SHIFT		2
+#define MT6370_BL_DIM2_COMMON_MASK	GENMASK(2, 0)
+#define MT6370_BL_DIM2_COMMON_SHIFT	3
+#define MT6370_BL_DIM2_6372_MASK	GENMASK(5, 0)
+#define MT6370_BL_DIM2_6372_SHIFT	6
+#define MT6370_BL_PWM_EN_MASK		BIT(7)
+#define MT6370_BL_PWM_HYS_EN_MASK	BIT(2)
+#define MT6370_BL_PWM_HYS_SEL_MASK	GENMASK(1, 0)
+#define MT6370_BL_OVP_EN_MASK		BIT(7)
+#define MT6370_BL_OVP_SEL_MASK		GENMASK(6, 5)
+#define MT6370_BL_OVP_SEL_SHIFT		5
+#define MT6370_BL_OC_EN_MASK		BIT(3)
+#define MT6370_BL_OC_SEL_MASK		GENMASK(2, 1)
+#define MT6370_BL_OC_SEL_SHIFT		1
+
+#define MT6370_BL_PWM_HYS_TH_MIN_STEP	1
+#define MT6370_BL_PWM_HYS_TH_MAX_STEP	64
+#define MT6370_BL_OVP_MIN_UV		17000000
+#define MT6370_BL_OVP_MAX_UV		29000000
+#define MT6370_BL_OVP_STEP_UV		4000000
+#define MT6370_BL_OCP_MIN_UA		900000
+#define MT6370_BL_OCP_MAX_UA		1800000
+#define MT6370_BL_OCP_STEP_UA		300000
+#define MT6370_BL_MAX_COMMON_BRIGHTNESS	2048
+#define MT6370_BL_MAX_6372_BRIGHTNESS	16384
+#define MT6370_BL_MAX_CH		15
+
+enum {
+	MT6370_VID_COMMON = 1,
+	MT6370_VID_6372,
+};
+
+struct mt6370_priv {
+	u8 dim2_mask;
+	u8 dim2_shift;
+	int def_max_brightness;
+	struct backlight_device *bl;
+	struct device *dev;
+	struct gpio_desc *enable_gpio;
+	struct regmap *regmap;
+};
+
+static int mt6370_bl_update_status(struct backlight_device *bl_dev)
+{
+	struct mt6370_priv *priv = bl_get_data(bl_dev);
+	int brightness = backlight_get_brightness(bl_dev);
+	unsigned int enable_val;
+	u8 brightness_val[2];
+	int ret;
+
+	if (brightness) {
+		brightness_val[0] = (brightness - 1) & priv->dim2_mask;
+		brightness_val[1] = (brightness - 1) >> priv->dim2_shift;
+
+		ret = regmap_raw_write(priv->regmap, MT6370_REG_BL_DIM2,
+				       brightness_val, sizeof(brightness_val));
+		if (ret)
+			return ret;
+	}
+
+	gpiod_set_value(priv->enable_gpio, !!brightness);
+
+	enable_val = brightness ? MT6370_BL_EN_MASK : 0;
+	return regmap_update_bits(priv->regmap, MT6370_REG_BL_EN,
+				  MT6370_BL_EN_MASK, enable_val);
+}
+
+static int mt6370_bl_get_brightness(struct backlight_device *bl_dev)
+{
+	struct mt6370_priv *priv = bl_get_data(bl_dev);
+	unsigned int enable;
+	u8 brightness_val[2];
+	int brightness, ret;
+
+	ret = regmap_read(priv->regmap, MT6370_REG_BL_EN, &enable);
+	if (ret)
+		return ret;
+
+	if (!(enable & MT6370_BL_EN_MASK))
+		return 0;
+
+	ret = regmap_raw_read(priv->regmap, MT6370_REG_BL_DIM2,
+			      brightness_val, sizeof(brightness_val));
+	if (ret)
+		return ret;
+
+	brightness = brightness_val[1] << priv->dim2_shift;
+	brightness += brightness_val[0] & priv->dim2_mask;
+
+	return brightness + 1;
+}
+
+static const struct backlight_ops mt6370_bl_ops = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.update_status = mt6370_bl_update_status,
+	.get_brightness = mt6370_bl_get_brightness,
+};
+
+static int mt6370_init_backlight_properties(struct mt6370_priv *priv,
+					    struct backlight_properties *props)
+{
+	struct device *dev = priv->dev;
+	u8 prop_val;
+	u32 brightness, ovp_uV, ocp_uA;
+	unsigned int mask, val;
+	int ret;
+
+	/* Vendor optional properties */
+	val = 0;
+	if (device_property_read_bool(dev, "mediatek,bled-pwm-enable"))
+		val |= MT6370_BL_PWM_EN_MASK;
+
+	if (device_property_read_bool(dev, "mediatek,bled-pwm-hys-enable"))
+		val |= MT6370_BL_PWM_HYS_EN_MASK;
+
+	ret = device_property_read_u8(dev,
+				      "mediatek,bled-pwm-hys-input-th-steps",
+				      &prop_val);
+	if (!ret) {
+		prop_val = clamp_val(prop_val,
+				     MT6370_BL_PWM_HYS_TH_MIN_STEP,
+				     MT6370_BL_PWM_HYS_TH_MAX_STEP);
+		prop_val = prop_val <= 1 ? 0 :
+			   prop_val <= 4 ? 1 :
+			   prop_val <= 16 ? 2 : 3;
+		val |= prop_val;
+	}
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_BL_PWM,
+				 val, val);
+	if (ret)
+		return ret;
+
+	val = 0;
+	if (device_property_read_bool(dev, "mediatek,bled-ovp-shutdown"))
+		val |= MT6370_BL_OVP_EN_MASK;
+
+	ret = device_property_read_u32(dev, "mediatek,bled-ovp-microvolt",
+				       &ovp_uV);
+	if (!ret) {
+		ovp_uV = clamp_val(ovp_uV, MT6370_BL_OVP_MIN_UV,
+				   MT6370_BL_OVP_MAX_UV);
+		ovp_uV = DIV_ROUND_UP(ovp_uV - MT6370_BL_OVP_MIN_UV,
+				      MT6370_BL_OVP_STEP_UV);
+		val |= ovp_uV << MT6370_BL_OVP_SEL_SHIFT;
+	}
+
+	if (device_property_read_bool(dev, "mediatek,bled-ocp-shutdown"))
+		val |= MT6370_BL_OC_EN_MASK;
+
+	ret = device_property_read_u32(dev, "mediatek,bled-ocp-microamp",
+				       &ocp_uA);
+	if (!ret) {
+		ocp_uA = clamp_val(ocp_uA, MT6370_BL_OCP_MIN_UA,
+				   MT6370_BL_OCP_MAX_UA);
+		ocp_uA = DIV_ROUND_UP(ocp_uA - MT6370_BL_OCP_MIN_UA,
+				      MT6370_BL_OCP_STEP_UA);
+		val |= ocp_uA << MT6370_BL_OC_SEL_SHIFT;
+	}
+
+	ret = regmap_update_bits(priv->regmap, MT6370_REG_BL_BSTCTRL,
+				 val, val);
+	if (ret)
+		return ret;
+
+	/* Common properties */
+	ret = device_property_read_u32(dev, "max-brightness", &brightness);
+	if (ret)
+		brightness = priv->def_max_brightness;
+
+	props->max_brightness = min_t(u32, brightness, priv->def_max_brightness);
+
+	ret = device_property_read_u32(dev, "default-brightness", &brightness);
+	if (ret)
+		brightness = props->max_brightness;
+
+	props->brightness = min_t(u32, brightness, props->max_brightness);
+
+	val = 0;
+	if (device_property_read_bool(dev, "mediatek,bled-exponential-mode-enable")) {
+		val |= MT6370_BL_CODE_MASK;
+		props->scale = BACKLIGHT_SCALE_NON_LINEAR;
+	} else
+		props->scale = BACKLIGHT_SCALE_LINEAR;
+
+	ret = device_property_read_u8(dev, "mediatek,bled-channel-use",
+				      &prop_val);
+	if (ret) {
+		dev_err(dev, "mediatek,bled-channel-use DT property missing\n");
+		return ret;
+	}
+
+	if (!prop_val || prop_val > MT6370_BL_MAX_CH) {
+		dev_err(dev,
+			"No channel specified or over than upper bound (%d)\n",
+			prop_val);
+		return -EINVAL;
+	}
+
+	mask = MT6370_BL_EXT_EN_MASK | MT6370_BL_CH_MASK;
+	val |= prop_val << MT6370_BL_CH_SHIFT;
+
+	if (priv->enable_gpio)
+		val |= MT6370_BL_EXT_EN_MASK;
+
+	return regmap_update_bits(priv->regmap, MT6370_REG_BL_EN, mask, val);
+}
+
+static int mt6370_check_vendor_info(struct mt6370_priv *priv)
+{
+	/*
+	 * MT6372 uses 14 bits to control the brightness but MT6370 and MT6371
+	 * use 11 bits. They are different so we have to use this function to
+	 * check the vendor ID and use different mask, shift and default
+	 * maxiimum brightness value.
+	 */
+	unsigned int dev_info, hw_vid, of_vid;
+	int ret;
+
+	ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &dev_info);
+	if (ret)
+		return ret;
+
+	of_vid = (uintptr_t)of_device_get_match_data(priv->dev);
+	hw_vid = FIELD_GET(MT6370_VENID_MASK, dev_info);
+	hw_vid = hw_vid == 0x9 || hw_vid == 0xb ? MT6370_VID_6372 : MT6370_VID_COMMON;
+	if (hw_vid != of_vid) {
+		dev_err(priv->dev, "Buggy DT, wrong compatible string\n");
+		return -EINVAL;
+	}
+
+	if (hw_vid == MT6370_VID_6372) {
+		priv->dim2_mask = MT6370_BL_DIM2_6372_MASK;
+		priv->dim2_shift = MT6370_BL_DIM2_6372_SHIFT;
+		priv->def_max_brightness = MT6370_BL_MAX_6372_BRIGHTNESS;
+	} else {
+		priv->dim2_mask = MT6370_BL_DIM2_COMMON_MASK;
+		priv->dim2_shift = MT6370_BL_DIM2_COMMON_SHIFT;
+		priv->def_max_brightness = MT6370_BL_MAX_COMMON_BRIGHTNESS;
+	}
+
+	return 0;
+}
+
+static int mt6370_bl_probe(struct platform_device *pdev)
+{
+	struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+	};
+	struct device *dev = &pdev->dev;
+	struct mt6370_priv *priv;
+	int ret;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = dev;
+
+	priv->regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->regmap)
+		return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
+
+	ret = mt6370_check_vendor_info(priv);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+	priv->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+						    GPIOD_OUT_HIGH);
+	if (IS_ERR(priv->enable_gpio))
+		return dev_err_probe(dev, PTR_ERR(priv->enable_gpio),
+				     "Failed to get 'enable' gpio\n");
+
+	ret = mt6370_init_backlight_properties(priv, &props);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to init backlight properties\n");
+
+	priv->bl = devm_backlight_device_register(dev, pdev->name, dev, priv,
+						  &mt6370_bl_ops, &props);
+	if (IS_ERR(priv->bl))
+		return dev_err_probe(dev, PTR_ERR(priv->bl),
+				     "Failed to register backlight\n");
+
+	backlight_update_status(priv->bl);
+	platform_set_drvdata(pdev, priv);
+
+	return 0;
+}
+
+static int mt6370_bl_remove(struct platform_device *pdev)
+{
+	struct mt6370_priv *priv = platform_get_drvdata(pdev);
+	struct backlight_device *bl_dev = priv->bl;
+
+	bl_dev->props.brightness = 0;
+	backlight_update_status(priv->bl);
+
+	return 0;
+}
+
+static const struct of_device_id __maybe_unused mt6370_bl_of_match[] = {
+	{ .compatible = "mediatek,mt6370-backlight", .data = (void *)MT6370_VID_COMMON },
+	{ .compatible = "mediatek,mt6372-backlight", .data = (void *)MT6370_VID_6372 },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_bl_of_match);
+
+static struct platform_driver mt6370_bl_driver = {
+	.driver = {
+		.name = "mt6370-backlight",
+		.of_match_table = mt6370_bl_of_match,
+	},
+	.probe = mt6370_bl_probe,
+	.remove = mt6370_bl_remove,
+};
+module_platform_driver(mt6370_bl_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
+MODULE_DESCRIPTION("MediaTek MT6370 Backlight Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

Re: [PATCH v7 08/13] usb: typec: tcpci_mt6370: Add MediaTek MT6370 tcpci driver

[Andy Shevchenko]

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiYuan Huang <cy_huang@richtek.com>
>
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual
> Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
>
> Add a support for the Type-C & Power Delivery controller in
> MediaTek MT6370 IC.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> ---
>
> v7
> - Revise 'devm_add_action_or_reset(dev, ...)' to one line
> - Revise 'return regmap_update_bits(...)' with using positive
>   conditional
> ---
>  drivers/usb/typec/tcpm/Kconfig        |  11 ++
>  drivers/usb/typec/tcpm/Makefile       |   1 +
>  drivers/usb/typec/tcpm/tcpci_mt6370.c | 207 ++++++++++++++++++++++++++++++++++
>  3 files changed, 219 insertions(+)
>  create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c
>
> diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
> index 073fd2e..e6b88ca 100644
> --- a/drivers/usb/typec/tcpm/Kconfig
> +++ b/drivers/usb/typec/tcpm/Kconfig
> @@ -35,6 +35,17 @@ config TYPEC_MT6360
>           USB Type-C. It works with Type-C Port Controller Manager
>           to provide USB PD and USB Type-C functionalities.
>
> +config TYPEC_TCPCI_MT6370
> +       tristate "MediaTek MT6370 Type-C driver"
> +       depends on MFD_MT6370
> +       help
> +         MediaTek MT6370 is a multi-functional IC that includes
> +         USB Type-C. It works with Type-C Port Controller Manager
> +         to provide USB PD and USB Type-C functionalities.
> +
> +         This driver can also be built as a module. The module
> +         will be called "tcpci_mt6370".
> +
>  config TYPEC_TCPCI_MAXIM
>         tristate "Maxim TCPCI based Type-C chip driver"
>         help
> diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile
> index 7d499f3..906d9dc 100644
> --- a/drivers/usb/typec/tcpm/Makefile
> +++ b/drivers/usb/typec/tcpm/Makefile
> @@ -6,4 +6,5 @@ typec_wcove-y                           := wcove.o
>  obj-$(CONFIG_TYPEC_TCPCI)              += tcpci.o
>  obj-$(CONFIG_TYPEC_RT1711H)            += tcpci_rt1711h.o
>  obj-$(CONFIG_TYPEC_MT6360)             += tcpci_mt6360.o
> +obj-$(CONFIG_TYPEC_TCPCI_MT6370)       += tcpci_mt6370.o
>  obj-$(CONFIG_TYPEC_TCPCI_MAXIM)                += tcpci_maxim.o
> diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c
> new file mode 100644
> index 0000000..c5bb201
> --- /dev/null
> +++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c
> @@ -0,0 +1,207 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiYuan Huang <cy_huang@richtek.com>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_wakeup.h>
> +#include <linux/pm_wakeirq.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/usb/tcpci.h>
> +#include <linux/usb/tcpm.h>
> +
> +#define MT6370_REG_SYSCTRL8    0x9B
> +
> +#define MT6370_AUTOIDLE_MASK   BIT(3)
> +
> +#define MT6370_VENDOR_ID       0x29CF
> +#define MT6370_TCPC_DID_A      0x2170
> +
> +struct mt6370_priv {
> +       struct device *dev;
> +       struct regulator *vbus;
> +       struct tcpci *tcpci;
> +       struct tcpci_data tcpci_data;
> +};
> +
> +static const struct reg_sequence mt6370_reg_init[] = {
> +       REG_SEQ(0xA0, 0x1, 1000),
> +       REG_SEQ(0x81, 0x38, 0),
> +       REG_SEQ(0x82, 0x82, 0),
> +       REG_SEQ(0xBA, 0xFC, 0),
> +       REG_SEQ(0xBB, 0x50, 0),
> +       REG_SEQ(0x9E, 0x8F, 0),
> +       REG_SEQ(0xA1, 0x5, 0),
> +       REG_SEQ(0xA2, 0x4, 0),
> +       REG_SEQ(0xA3, 0x4A, 0),
> +       REG_SEQ(0xA4, 0x01, 0),
> +       REG_SEQ(0x95, 0x01, 0),
> +       REG_SEQ(0x80, 0x71, 0),
> +       REG_SEQ(0x9B, 0x3A, 1000),
> +};
> +
> +static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data)
> +{
> +       u16 did;
> +       int ret;
> +
> +       ret = regmap_register_patch(data->regmap, mt6370_reg_init,
> +                                   ARRAY_SIZE(mt6370_reg_init));
> +       if (ret)
> +               return ret;
> +
> +       ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16));
> +       if (ret)
> +               return ret;
> +
> +       if (did == MT6370_TCPC_DID_A)
> +               return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80);
> +
> +       return 0;
> +}
> +
> +static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data,
> +                                bool enable)
> +{
> +       return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8,
> +                                 MT6370_AUTOIDLE_MASK,
> +                                 enable ? 0 : MT6370_AUTOIDLE_MASK);
> +}
> +
> +static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data,
> +                               bool source, bool sink)
> +{
> +       struct mt6370_priv *priv = container_of(data, struct mt6370_priv,
> +                                               tcpci_data);
> +       int ret;
> +
> +       ret = regulator_is_enabled(priv->vbus);
> +       if (ret < 0)
> +               return ret;
> +
> +       if (ret && !source)
> +               return regulator_disable(priv->vbus);
> +
> +       if (!ret && source)
> +               return regulator_enable(priv->vbus);
> +
> +       return 0;
> +}
> +
> +static irqreturn_t mt6370_irq_handler(int irq, void *dev_id)
> +{
> +       struct mt6370_priv *priv = dev_id;
> +
> +       return tcpci_irq(priv->tcpci);
> +}
> +
> +static int mt6370_check_vendor_info(struct mt6370_priv *priv)
> +{
> +       struct regmap *regmap = priv->tcpci_data.regmap;
> +       u16 vid;
> +       int ret;
> +
> +       ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16));
> +       if (ret)
> +               return ret;
> +
> +       if (vid != MT6370_VENDOR_ID)
> +               return dev_err_probe(priv->dev, -ENODEV,
> +                                    "Vendor ID not correct 0x%02x\n", vid);
> +
> +       return 0;
> +}
> +
> +static void mt6370_unregister_tcpci_port(void *tcpci)
> +{
> +       tcpci_unregister_port(tcpci);
> +}
> +
> +static int mt6370_tcpc_probe(struct platform_device *pdev)
> +{
> +       struct mt6370_priv *priv;
> +       struct device *dev = &pdev->dev;
> +       int irq, ret;
> +
> +       priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +       if (!priv)
> +               return -ENOMEM;
> +
> +       priv->dev = dev;
> +
> +       priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL);
> +       if (!priv->tcpci_data.regmap)
> +               return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n");
> +
> +       ret = mt6370_check_vendor_info(priv);
> +       if (ret)
> +               return ret;
> +
> +       irq = platform_get_irq(pdev, 0);
> +       if (irq < 0)
> +               return dev_err_probe(dev, irq, "Failed to get irq\n");
> +
> +       /* Assign TCPCI feature and ops */
> +       priv->tcpci_data.auto_discharge_disconnect = 1;
> +       priv->tcpci_data.init = mt6370_tcpc_init;
> +       priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn;
> +
> +       priv->vbus = devm_regulator_get_optional(dev, "vbus");
> +       if (!IS_ERR(priv->vbus))
> +               priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus;
> +
> +       priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data);
> +       if (IS_ERR(priv->tcpci))
> +               return dev_err_probe(dev, PTR_ERR(priv->tcpci),
> +                                    "Failed to register tcpci port\n");
> +
> +       ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci);
> +       if (ret)
> +               return ret;
> +
> +       ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler,
> +                                       IRQF_ONESHOT, dev_name(dev), priv);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to allocate irq\n");
> +
> +       device_init_wakeup(dev, true);
> +       dev_pm_set_wake_irq(dev, irq);
> +
> +       return 0;
> +}
> +
> +static int mt6370_tcpc_remove(struct platform_device *pdev)
> +{
> +       dev_pm_clear_wake_irq(&pdev->dev);
> +       device_init_wakeup(&pdev->dev, false);
> +
> +       return 0;
> +}
> +
> +static const struct of_device_id mt6370_tcpc_devid_table[] = {
> +       { .compatible = "mediatek,mt6370-tcpc" },
> +       {}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table);
> +
> +static struct platform_driver mt6370_tcpc_driver = {
> +       .driver = {
> +               .name = "mt6370-tcpc",
> +               .of_match_table = mt6370_tcpc_devid_table,
> +       },
> +       .probe = mt6370_tcpc_probe,
> +       .remove = mt6370_tcpc_remove,
> +};
> +module_platform_driver(mt6370_tcpc_driver);
> +
> +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
> +MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v7 09/13] iio: adc: mt6370: Add MediaTek MT6370 support

[Andy Shevchenko]

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiaEn Wu <chiaen_wu@richtek.com>
>
> MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> driver, display bias voltage supply, one general purpose LDO, and the
> USB Type-C & PD controller complies with the latest USB Type-C and PD
> standards.
>
> Add a support for the MT6370 ADC driver for system monitoring, including
> charger current, voltage, and temperature.

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiYuan Huang <cy_huang@richtek.com>
>
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual
> Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
>
> Add a support for the Type-C & Power Delivery controller in
> MediaTek MT6370 IC.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> ---
>
> v7
> - Add AICR(100mA ~ 350mA), ICHG(100mA ~ 800mA) macros
> - Remove 400mA AICR and 900mA ICHG macros
> - Revise using 'if-else' to 'switch-case' in mt6370_adc_read_scale()
>   where the adc channel is ibus or ibat
> ---
>  drivers/iio/adc/Kconfig      |  12 ++
>  drivers/iio/adc/Makefile     |   1 +
>  drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 318 insertions(+)
>  create mode 100644 drivers/iio/adc/mt6370-adc.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 7fe5930..995cbb5 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -736,6 +736,18 @@ config MEDIATEK_MT6360_ADC
>           is used in smartphones and tablets and supports a 11 channel
>           general purpose ADC.
>
> +config MEDIATEK_MT6370_ADC
> +       tristate "MediaTek MT6370 ADC driver"
> +       depends on MFD_MT6370
> +       help
> +         Say yes here to enable MediaTek MT6370 ADC support.
> +
> +         This ADC driver provides 9 channels for system monitoring (charger
> +         current, voltage, and temperature).
> +
> +         This driver can also be built as a module. If so, the module
> +         will be called "mt6370-adc".
> +
>  config MEDIATEK_MT6577_AUXADC
>         tristate "MediaTek AUXADC driver"
>         depends on ARCH_MEDIATEK || COMPILE_TEST
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index 1772a54..c6bc35f 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
>  obj-$(CONFIG_MCP3422) += mcp3422.o
>  obj-$(CONFIG_MCP3911) += mcp3911.o
>  obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
> +obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
>  obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
>  obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
>  obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
> diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
> new file mode 100644
> index 0000000..2a46471
> --- /dev/null
> +++ b/drivers/iio/adc/mt6370-adc.c
> @@ -0,0 +1,305 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiaEn Wu <chiaen_wu@richtek.com>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/bitfield.h>
> +#include <linux/iio/iio.h>
> +#include <linux/kernel.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/sysfs.h>
> +#include <linux/units.h>
> +
> +#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
> +
> +#define MT6370_REG_CHG_CTRL3           0x113
> +#define MT6370_REG_CHG_CTRL7           0x117
> +#define MT6370_REG_CHG_ADC             0x121
> +#define MT6370_REG_ADC_DATA_H          0x14C
> +
> +#define MT6370_ADC_START_MASK          BIT(0)
> +#define MT6370_ADC_IN_SEL_MASK         GENMASK(7, 4)
> +#define MT6370_AICR_ICHG_MASK          GENMASK(7, 2)
> +
> +#define MT6370_AICR_100_mA             0x0
> +#define MT6370_AICR_150_mA             0x1
> +#define MT6370_AICR_200_mA             0x2
> +#define MT6370_AICR_250_mA             0x3
> +#define MT6370_AICR_300_mA             0x4
> +#define MT6370_AICR_350_mA             0x5
> +
> +#define MT6370_ICHG_100_mA             0x0
> +#define MT6370_ICHG_200_mA             0x1
> +#define MT6370_ICHG_300_mA             0x2
> +#define MT6370_ICHG_400_mA             0x3
> +#define MT6370_ICHG_500_mA             0x4
> +#define MT6370_ICHG_600_mA             0x5
> +#define MT6370_ICHG_700_mA             0x6
> +#define MT6370_ICHG_800_mA             0x7
> +
> +#define ADC_CONV_TIME_MS               35
> +#define ADC_CONV_POLLING_TIME_US       1000
> +
> +struct mt6370_adc_data {
> +       struct device *dev;
> +       struct regmap *regmap;
> +       /*
> +        * This mutex lock is for preventing the different ADC channels
> +        * from being read at the same time.
> +        */
> +       struct mutex adc_lock;
> +};
> +
> +static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
> +                                  unsigned long addr, int *val)
> +{
> +       unsigned int reg_val;
> +       __be16 be_val;
> +       int ret;
> +
> +       mutex_lock(&priv->adc_lock);
> +
> +       reg_val = MT6370_ADC_START_MASK |
> +                 FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
> +       ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
> +       if (ret)
> +               goto adc_unlock;
> +
> +       msleep(ADC_CONV_TIME_MS);
> +
> +       ret = regmap_read_poll_timeout(priv->regmap,
> +                                      MT6370_REG_CHG_ADC, reg_val,
> +                                      !(reg_val & MT6370_ADC_START_MASK),
> +                                      ADC_CONV_POLLING_TIME_US,
> +                                      ADC_CONV_TIME_MS * MILLI * 3);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
> +               goto adc_unlock;
> +       }
> +
> +       ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
> +                             &be_val, sizeof(be_val));
> +       if (ret)
> +               goto adc_unlock;
> +
> +       *val = be16_to_cpu(be_val);
> +       ret = IIO_VAL_INT;
> +
> +adc_unlock:
> +       mutex_unlock(&priv->adc_lock);
> +
> +       return ret;
> +}
> +
> +static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
> +                                int chan, int *val1, int *val2)
> +{
> +       unsigned int reg_val;
> +       int ret;
> +
> +       switch (chan) {
> +       case MT6370_CHAN_VBAT:
> +       case MT6370_CHAN_VSYS:
> +       case MT6370_CHAN_CHG_VDDP:
> +               *val1 = 5;
> +               return IIO_VAL_INT;
> +       case MT6370_CHAN_IBUS:
> +               ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, &reg_val);
> +               if (ret)
> +                       return ret;
> +
> +               reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> +               switch (reg_val) {
> +               case MT6370_AICR_100_mA:
> +               case MT6370_AICR_150_mA:
> +               case MT6370_AICR_200_mA:
> +               case MT6370_AICR_250_mA:
> +               case MT6370_AICR_300_mA:
> +               case MT6370_AICR_350_mA:
> +                       *val1 = 3350;
> +                       break;
> +               default:
> +                       *val1 = 5000;
> +                       break;
> +               }
> +
> +               *val2 = 100;
> +
> +               return IIO_VAL_FRACTIONAL;
> +       case MT6370_CHAN_IBAT:
> +               ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, &reg_val);
> +               if (ret)
> +                       return ret;
> +
> +               reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> +               switch (reg_val) {
> +               case MT6370_ICHG_100_mA:
> +               case MT6370_ICHG_200_mA:
> +               case MT6370_ICHG_300_mA:
> +               case MT6370_ICHG_400_mA:
> +                       *val1 = 2375;
> +                       break;
> +               case MT6370_ICHG_500_mA:
> +               case MT6370_ICHG_600_mA:
> +               case MT6370_ICHG_700_mA:
> +               case MT6370_ICHG_800_mA:
> +                       *val1 = 2680;
> +                       break;
> +               default:
> +                       *val1 = 5000;
> +                       break;
> +               }
> +
> +               *val2 = 100;
> +
> +               return IIO_VAL_FRACTIONAL;
> +       case MT6370_CHAN_VBUSDIV5:
> +               *val1 = 25;
> +               return IIO_VAL_INT;
> +       case MT6370_CHAN_VBUSDIV2:
> +               *val1 = 50;
> +               return IIO_VAL_INT;
> +       case MT6370_CHAN_TS_BAT:
> +               *val1 = 25;
> +               *val2 = 10000;
> +               return IIO_VAL_FRACTIONAL;
> +       case MT6370_CHAN_TEMP_JC:
> +               *val1 = 2000;
> +               return IIO_VAL_FRACTIONAL;
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
> +static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
> +                                 int chan, int *val)
> +{
> +       *val = -20;
> +
> +       return IIO_VAL_INT;
> +}
> +
> +static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
> +                              const struct iio_chan_spec *chan,
> +                              int *val, int *val2, long mask)
> +{
> +       struct mt6370_adc_data *priv = iio_priv(iio_dev);
> +
> +       switch (mask) {
> +       case IIO_CHAN_INFO_RAW:
> +               return mt6370_adc_read_channel(priv, chan->channel,
> +                                              chan->address, val);
> +       case IIO_CHAN_INFO_SCALE:
> +               return mt6370_adc_read_scale(priv, chan->channel, val, val2);
> +       case IIO_CHAN_INFO_OFFSET:
> +               return mt6370_adc_read_offset(priv, chan->channel, val);
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
> +static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
> +       [MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
> +       [MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
> +       [MT6370_CHAN_VSYS] = "vsys",
> +       [MT6370_CHAN_VBAT] = "vbat",
> +       [MT6370_CHAN_TS_BAT] = "ts_bat",
> +       [MT6370_CHAN_IBUS] = "ibus",
> +       [MT6370_CHAN_IBAT] = "ibat",
> +       [MT6370_CHAN_CHG_VDDP] = "chg_vddp",
> +       [MT6370_CHAN_TEMP_JC] = "temp_jc",
> +};
> +
> +static int mt6370_adc_read_label(struct iio_dev *iio_dev,
> +                                struct iio_chan_spec const *chan, char *label)
> +{
> +       return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
> +}
> +
> +static const struct iio_info mt6370_adc_iio_info = {
> +       .read_raw = mt6370_adc_read_raw,
> +       .read_label = mt6370_adc_read_label,
> +};
> +
> +#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) {     \
> +       .type = _type,                                          \
> +       .channel = MT6370_CHAN_##_idx,                          \
> +       .address = _addr,                                       \
> +       .scan_index = MT6370_CHAN_##_idx,                       \
> +       .indexed = 1,                                           \
> +       .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |          \
> +                             BIT(IIO_CHAN_INFO_SCALE) |        \
> +                             _extra_info,                      \
> +}
> +
> +static const struct iio_chan_spec mt6370_adc_channels[] = {
> +       MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
> +       MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
> +       MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
> +       MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
> +       MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
> +       MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
> +       MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
> +       MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
> +       MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
> +};
> +
> +static int mt6370_adc_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       struct mt6370_adc_data *priv;
> +       struct iio_dev *indio_dev;
> +       struct regmap *regmap;
> +       int ret;
> +
> +       regmap = dev_get_regmap(pdev->dev.parent, NULL);
> +       if (!regmap)
> +               return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> +
> +       indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
> +       if (!indio_dev)
> +               return -ENOMEM;
> +
> +       priv = iio_priv(indio_dev);
> +       priv->dev = dev;
> +       priv->regmap = regmap;
> +       mutex_init(&priv->adc_lock);
> +
> +       ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to reset ADC\n");
> +
> +       indio_dev->name = "mt6370-adc";
> +       indio_dev->info = &mt6370_adc_iio_info;
> +       indio_dev->modes = INDIO_DIRECT_MODE;
> +       indio_dev->channels = mt6370_adc_channels;
> +       indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
> +
> +       return devm_iio_device_register(dev, indio_dev);
> +}
> +
> +static const struct of_device_id mt6370_adc_of_id[] = {
> +       { .compatible = "mediatek,mt6370-adc", },
> +       {}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
> +
> +static struct platform_driver mt6370_adc_driver = {
> +       .driver = {
> +               .name = "mt6370-adc",
> +               .of_match_table = mt6370_adc_of_id,
> +       },
> +       .probe = mt6370_adc_probe,
> +};
> +module_platform_driver(mt6370_adc_driver);
> +
> +MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
> +MODULE_DESCRIPTION("MT6370 ADC Driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v7 10/13] power: supply: mt6370: Add MediaTek MT6370 charger driver

[Andy Shevchenko]

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiaEn Wu <chiaen_wu@richtek.com>
>
> MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> driver, display bias voltage supply, one general purpose LDO, and the
> USB Type-C & PD controller complies with the latest USB Type-C and PD
> standards.
>
> Add a support for the MediaTek MT6370 Charger driver. The charger module
> of MT6370 supports High-Accuracy Voltage/Current Regulation,
> Average Input Current Regulation, Battery Temperature Sensing,
> Over-Temperature Protection, DPDM Detection for BC1.2.

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiYuan Huang <cy_huang@richtek.com>
>
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual
> Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
>
> Add a support for the Type-C & Power Delivery controller in
> MediaTek MT6370 IC.

FWIW,
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> ---
>
> v7
> - Revise the method to enable/disable irq
> - Revise all 'if (ret < 0)' to 'if (ret)' after using
>   mt6370_chg_field_set/get()
> - Revise all 'OTG' text
> ---
>  drivers/power/supply/Kconfig          |  14 +
>  drivers/power/supply/Makefile         |   1 +
>  drivers/power/supply/mt6370-charger.c | 965 ++++++++++++++++++++++++++++++++++
>  3 files changed, 980 insertions(+)
>  create mode 100644 drivers/power/supply/mt6370-charger.c
>
> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
> index 1aa8323..591deb8 100644
> --- a/drivers/power/supply/Kconfig
> +++ b/drivers/power/supply/Kconfig
> @@ -619,6 +619,20 @@ config CHARGER_MT6360
>           Average Input Current Regulation, Battery Temperature Sensing,
>           Over-Temperature Protection, DPDM Detection for BC1.2.
>
> +config CHARGER_MT6370
> +       tristate "MediaTek MT6370 Charger Driver"
> +       depends on MFD_MT6370
> +       depends on REGULATOR
> +       select LINEAR_RANGES
> +       help
> +         Say Y here to enable MT6370 Charger Part.
> +         The device supports High-Accuracy Voltage/Current Regulation,
> +         Average Input Current Regulation, Battery Temperature Sensing,
> +         Over-Temperature Protection, DPDM Detection for BC1.2.
> +
> +         This driver can also be built as a module. If so, the module
> +         will be called "mt6370-charger".
> +
>  config CHARGER_QCOM_SMBB
>         tristate "Qualcomm Switch-Mode Battery Charger and Boost"
>         depends on MFD_SPMI_PMIC || COMPILE_TEST
> diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
> index 7f02f36..8c95276 100644
> --- a/drivers/power/supply/Makefile
> +++ b/drivers/power/supply/Makefile
> @@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
>  obj-$(CONFIG_CHARGER_MAX8998)  += max8998_charger.o
>  obj-$(CONFIG_CHARGER_MP2629)   += mp2629_charger.o
>  obj-$(CONFIG_CHARGER_MT6360)   += mt6360_charger.o
> +obj-$(CONFIG_CHARGER_MT6370)   += mt6370-charger.o
>  obj-$(CONFIG_CHARGER_QCOM_SMBB)        += qcom_smbb.o
>  obj-$(CONFIG_CHARGER_BQ2415X)  += bq2415x_charger.o
>  obj-$(CONFIG_CHARGER_BQ24190)  += bq24190_charger.o
> diff --git a/drivers/power/supply/mt6370-charger.c b/drivers/power/supply/mt6370-charger.c
> new file mode 100644
> index 0000000..42fddc3
> --- /dev/null
> +++ b/drivers/power/supply/mt6370-charger.c
> @@ -0,0 +1,965 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiaEn Wu <chiaen_wu@richtek.com>
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/iio/consumer.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/linear_range.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/workqueue.h>
> +
> +#define MT6370_REG_CHG_CTRL1           0x111
> +#define MT6370_REG_CHG_CTRL2           0x112
> +#define MT6370_REG_CHG_CTRL3           0x113
> +#define MT6370_REG_CHG_CTRL4           0x114
> +#define MT6370_REG_CHG_CTRL5           0x115
> +#define MT6370_REG_CHG_CTRL6           0x116
> +#define MT6370_REG_CHG_CTRL7           0x117
> +#define MT6370_REG_CHG_CTRL8           0x118
> +#define MT6370_REG_CHG_CTRL9           0x119
> +#define MT6370_REG_CHG_CTRL10          0x11A
> +#define MT6370_REG_DEVICE_TYPE         0x122
> +#define MT6370_REG_USB_STATUS1         0x127
> +#define MT6370_REG_CHG_STAT            0x14A
> +#define MT6370_REG_FLED_EN             0x17E
> +#define MT6370_REG_CHG_STAT1           0X1D0
> +#define MT6370_REG_OVPCTRL_STAT                0x1D8
> +
> +#define MT6370_VOBST_MASK              GENMASK(7, 2)
> +#define MT6370_OTG_PIN_EN_MASK         BIT(1)
> +#define MT6370_OPA_MODE_MASK           BIT(0)
> +#define MT6370_OTG_OC_MASK             GENMASK(2, 0)
> +
> +#define MT6370_MIVR_IBUS_TH_100_mA     100000
> +#define MT6370_ADC_CHAN_IBUS           5
> +#define MT6370_ADC_CHAN_MAX            9
> +
> +enum mt6370_chg_reg_field {
> +       /* MT6370_REG_CHG_CTRL2 */
> +       F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
> +       /* MT6370_REG_CHG_CTRL3 */
> +       F_IAICR, F_AICR_EN, F_ILIM_EN,
> +       /* MT6370_REG_CHG_CTRL4 */
> +       F_VOREG,
> +       /* MT6370_REG_CHG_CTRL6 */
> +       F_VMIVR,
> +       /* MT6370_REG_CHG_CTRL7 */
> +       F_ICHG,
> +       /* MT6370_REG_CHG_CTRL8 */
> +       F_IPREC,
> +       /* MT6370_REG_CHG_CTRL9 */
> +       F_IEOC,
> +       /* MT6370_REG_DEVICE_TYPE */
> +       F_USBCHGEN,
> +       /* MT6370_REG_USB_STATUS1 */
> +       F_USB_STAT, F_CHGDET,
> +       /* MT6370_REG_CHG_STAT */
> +       F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
> +       /* MT6370_REG_FLED_EN */
> +       F_FL_STROBE,
> +       /* MT6370_REG_CHG_STAT1 */
> +       F_CHG_MIVR_STAT,
> +       /* MT6370_REG_OVPCTRL_STAT */
> +       F_UVP_D_STAT,
> +       F_MAX
> +};
> +
> +enum mt6370_irq {
> +       MT6370_IRQ_ATTACH_I = 0,
> +       MT6370_IRQ_UVP_D_EVT,
> +       MT6370_IRQ_MIVR,
> +       MT6370_IRQ_MAX
> +};
> +
> +struct mt6370_priv {
> +       struct device *dev;
> +       struct iio_channel *iio_adcs;
> +       struct mutex attach_lock;
> +       struct power_supply *psy;
> +       struct regmap *regmap;
> +       struct regmap_field *rmap_fields[F_MAX];
> +       struct regulator_dev *rdev;
> +       struct workqueue_struct *wq;
> +       struct work_struct bc12_work;
> +       struct delayed_work mivr_dwork;
> +       unsigned int irq_nums[MT6370_IRQ_MAX];
> +       int attach;
> +       int psy_usb_type;
> +       bool pwr_rdy;
> +};
> +
> +enum mt6370_usb_status {
> +       MT6370_USB_STAT_NO_VBUS = 0,
> +       MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
> +       MT6370_USB_STAT_SDP,
> +       MT6370_USB_STAT_SDP_NSTD,
> +       MT6370_USB_STAT_DCP,
> +       MT6370_USB_STAT_CDP,
> +       MT6370_USB_STAT_MAX
> +};
> +
> +struct mt6370_chg_field {
> +       const char *name;
> +       const struct linear_range *range;
> +       struct reg_field field;
> +};
> +
> +enum {
> +       MT6370_RANGE_F_IAICR = 0,
> +       MT6370_RANGE_F_VOREG,
> +       MT6370_RANGE_F_VMIVR,
> +       MT6370_RANGE_F_ICHG,
> +       MT6370_RANGE_F_IPREC,
> +       MT6370_RANGE_F_IEOC,
> +       MT6370_RANGE_F_MAX
> +};
> +
> +#define MT6370_CHG_LINEAR_RANGE(_rfd, _min, _min_sel, _max_sel, _step) \
> +[_rfd] = {                                                             \
> +       .min = _min,                                                    \
> +       .min_sel = _min_sel,                                            \
> +       .max_sel = _max_sel,                                            \
> +       .step = _step,                                                  \
> +}
> +
> +static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
> +       MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
> +       MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
> +       MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
> +       MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
> +       MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
> +       MT6370_CHG_LINEAR_RANGE(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
> +};
> +
> +#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb)                                \
> +[_fd] = {                                                              \
> +       .name = #_fd,                                                   \
> +       .range = NULL,                                                  \
> +       .field = REG_FIELD(_reg, _lsb, _msb),                           \
> +}
> +
> +#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb)                  \
> +[_fd] = {                                                              \
> +       .name = #_fd,                                                   \
> +       .range = &mt6370_chg_ranges[MT6370_RANGE_##_fd],                \
> +       .field = REG_FIELD(_reg, _lsb, _msb),                           \
> +}
> +
> +static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
> +       MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
> +       MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
> +       MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
> +       MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
> +       MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
> +       MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
> +       MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
> +       MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
> +       MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
> +       MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
> +       MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
> +       MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
> +       MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
> +       MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
> +       MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
> +       MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
> +       MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
> +       MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
> +       MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
> +       MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
> +};
> +
> +static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
> +                                      enum mt6370_chg_reg_field fd,
> +                                      unsigned int *val)
> +{
> +       int ret;
> +       unsigned int reg_val;
> +
> +       ret = regmap_field_read(priv->rmap_fields[fd], &reg_val);
> +       if (ret)
> +               return ret;
> +
> +       if (mt6370_chg_fields[fd].range)
> +               return linear_range_get_value(mt6370_chg_fields[fd].range,
> +                                              reg_val, val);
> +
> +       *val = reg_val;
> +       return 0;
> +}
> +
> +static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
> +                                      enum mt6370_chg_reg_field fd,
> +                                      unsigned int val)
> +{
> +       int ret;
> +       bool f;
> +       const struct linear_range *r;
> +
> +       if (mt6370_chg_fields[fd].range) {
> +               r = mt6370_chg_fields[fd].range;
> +
> +               if (fd == F_VMIVR) {
> +                       ret = linear_range_get_selector_high(r, val, &val, &f);
> +                       if (ret)
> +                               val = r->max_sel;
> +               } else {
> +                       linear_range_get_selector_within(r, val, &val);
> +               }
> +       }
> +
> +       return regmap_field_write(priv->rmap_fields[fd], val);
> +}
> +
> +enum {
> +       MT6370_CHG_STAT_READY = 0,
> +       MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
> +       MT6370_CHG_STAT_DONE,
> +       MT6370_CHG_STAT_FAULT,
> +       MT6370_CHG_STAT_MAX
> +};
> +
> +enum {
> +       MT6370_ATTACH_STAT_DETACH = 0,
> +       MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE,
> +       MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
> +       MT6370_ATTACH_STAT_ATTACH_MAX
> +};
> +
> +static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
> +                                     const struct regulator_desc *rdesc,
> +                                     struct regulator_config *rcfg)
> +{
> +       struct mt6370_priv *priv = rcfg->driver_data;
> +
> +       rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
> +                                                "enable", 0, GPIOD_OUT_LOW |
> +                                                GPIOD_FLAGS_BIT_NONEXCLUSIVE,
> +                                                rdesc->name);
> +       if (IS_ERR(rcfg->ena_gpiod)) {
> +               rcfg->ena_gpiod = NULL;
> +               return 0;
> +       }
> +
> +       return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
> +                                 MT6370_OTG_PIN_EN_MASK,
> +                                 MT6370_OTG_PIN_EN_MASK);
> +}
> +
> +static void mt6370_chg_bc12_work_func(struct work_struct *work)
> +{
> +       struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
> +                                               bc12_work);
> +       int ret;
> +       bool rpt_psy = false;
> +       unsigned int attach, usb_stat;
> +
> +       mutex_lock(&priv->attach_lock);
> +       attach = priv->attach;
> +
> +       switch (attach) {
> +       case MT6370_ATTACH_STAT_DETACH:
> +               usb_stat = 0;
> +               break;
> +       case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
> +               ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
> +               if (ret) {
> +                       dev_err(priv->dev, "Failed to get USB status\n");
> +                       goto bc12_work_func_out;
> +               }
> +               break;
> +       case MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE:
> +               ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
> +               if (ret)
> +                       dev_err(priv->dev, "Failed to enable USB CHG EN\n");
> +               goto bc12_work_func_out;
> +       default:
> +               dev_err(priv->dev, "Invalid attach state\n");
> +               goto bc12_work_func_out;
> +       }
> +
> +       rpt_psy = true;
> +
> +       switch (usb_stat) {
> +       case MT6370_USB_STAT_SDP:
> +       case MT6370_USB_STAT_SDP_NSTD:
> +               priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
> +               break;
> +       case MT6370_USB_STAT_DCP:
> +               priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
> +               break;
> +       case MT6370_USB_STAT_CDP:
> +               priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
> +               break;
> +       case MT6370_USB_STAT_NO_VBUS:
> +       case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
> +       default:
> +               priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
> +               break;
> +       }
> +
> +bc12_work_func_out:
> +       mutex_unlock(&priv->attach_lock);
> +
> +       if (rpt_psy)
> +               power_supply_changed(priv->psy);
> +}
> +
> +static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
> +{
> +       int ret;
> +       unsigned int fl_strobe;
> +
> +       /* check if flash led in strobe mode */
> +       ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
> +               return ret;
> +       }
> +
> +       if (fl_strobe) {
> +               dev_err(priv->dev, "Flash led is still in strobe mode\n");
> +               return ret;
> +       }
> +
> +       /* cfo off */
> +       ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to disable CFO_EN\n");
> +               return ret;
> +       }
> +
> +       /* cfo on */
> +       ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
> +       if (ret)
> +               dev_err(priv->dev, "Failed to enable CFO_EN\n");
> +
> +       return ret;
> +}
> +
> +static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
> +                                   int *val)
> +{
> +       int ret;
> +
> +       if (chan >= MT6370_ADC_CHAN_MAX)
> +               return -EINVAL;
> +
> +       ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
> +       if (ret)
> +               dev_err(priv->dev, "Failed to read ADC\n");
> +
> +       return ret;
> +}
> +
> +static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
> +{
> +       struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
> +                                               mivr_dwork.work);
> +       int ret;
> +       unsigned int mivr_stat, ibus;
> +
> +       ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get mivr state\n");
> +               goto mivr_handler_out;
> +       }
> +
> +       if (!mivr_stat)
> +               goto mivr_handler_out;
> +
> +       ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get ibus\n");
> +               goto mivr_handler_out;
> +       }
> +
> +       if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
> +               ret = mt6370_chg_toggle_cfo(priv);
> +               if (ret)
> +                       dev_err(priv->dev, "Failed to toggle cfo\n");
> +       }
> +
> +mivr_handler_out:
> +       enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
> +       pm_relax(priv->dev);
> +}
> +
> +static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
> +{
> +       int ret;
> +       unsigned int pwr_rdy, otg_en;
> +       union power_supply_propval val;
> +
> +       /* Check in OTG mode or not */
> +       ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get OTG state\n");
> +               return;
> +       }
> +
> +       if (otg_en)
> +               return;
> +
> +       ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &pwr_rdy);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get pwr_rdy state reg\n");
> +               return;
> +       }
> +
> +       val.intval = !pwr_rdy;
> +
> +       ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
> +                                       &val);
> +       if (ret)
> +               dev_err(priv->dev, "Failed to start attach/detach flow\n");
> +}
> +
> +static int mt6370_chg_get_online(struct mt6370_priv *priv,
> +                                union power_supply_propval *val)
> +{
> +       mutex_lock(&priv->attach_lock);
> +       val->intval = !!priv->attach;
> +       mutex_unlock(&priv->attach_lock);
> +
> +       return 0;
> +}
> +
> +static int mt6370_chg_get_status(struct mt6370_priv *priv,
> +                                union power_supply_propval *val)
> +{
> +       int ret;
> +       unsigned int chg_stat;
> +       union power_supply_propval online;
> +
> +       ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
> +                                       &online);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get online status\n");
> +               return ret;
> +       }
> +
> +       if (!online.intval) {
> +               val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> +               return 0;
> +       }
> +
> +       ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
> +       if (ret)
> +               return ret;
> +
> +       switch (chg_stat) {
> +       case MT6370_CHG_STAT_READY:
> +       case MT6370_CHG_STAT_FAULT:
> +               val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
> +               return ret;
> +       case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
> +               val->intval = POWER_SUPPLY_STATUS_CHARGING;
> +               return ret;
> +       case MT6370_CHG_STAT_DONE:
> +               val->intval = POWER_SUPPLY_STATUS_FULL;
> +               return ret;
> +       default:
> +               val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
> +               return ret;
> +       }
> +}
> +
> +static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
> +                                     union power_supply_propval *val)
> +{
> +       int type, ret;
> +       unsigned int chg_stat, vbat_lvl;
> +
> +       ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
> +       if (ret)
> +               return ret;
> +
> +       ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
> +       if (ret)
> +               return ret;
> +
> +       switch (chg_stat) {
> +       case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
> +               if (vbat_lvl)
> +                       type = POWER_SUPPLY_CHARGE_TYPE_FAST;
> +               else
> +                       type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> +               break;
> +       case MT6370_CHG_STAT_READY:
> +       case MT6370_CHG_STAT_DONE:
> +       case MT6370_CHG_STAT_FAULT:
> +       default:
> +               type = POWER_SUPPLY_CHARGE_TYPE_NONE;
> +               break;
> +       }
> +
> +       val->intval = type;
> +
> +       return 0;
> +}
> +
> +static int mt6370_chg_set_online(struct mt6370_priv *priv,
> +                                const union power_supply_propval *val)
> +{
> +       bool pwr_rdy = !!val->intval;
> +
> +       mutex_lock(&priv->attach_lock);
> +       if (pwr_rdy == !!priv->attach) {
> +               dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
> +               mutex_unlock(&priv->attach_lock);
> +               return 0;
> +       }
> +
> +       priv->attach = pwr_rdy;
> +       mutex_unlock(&priv->attach_lock);
> +
> +       if (!queue_work(priv->wq, &priv->bc12_work))
> +               dev_err(priv->dev, "bc12 work has already queued\n");
> +
> +       return 0;
> +}
> +
> +static int mt6370_chg_get_property(struct power_supply *psy,
> +                                  enum power_supply_property psp,
> +                                  union power_supply_propval *val)
> +{
> +       struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +
> +       switch (psp) {
> +       case POWER_SUPPLY_PROP_ONLINE:
> +               return mt6370_chg_get_online(priv, val);
> +       case POWER_SUPPLY_PROP_STATUS:
> +               return mt6370_chg_get_status(priv, val);
> +       case POWER_SUPPLY_PROP_CHARGE_TYPE:
> +               return mt6370_chg_get_charge_type(priv, val);
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> +               return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
> +               val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
> +               return 0;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> +               return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
> +               val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
> +               return 0;
> +       case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> +               return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
> +       case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> +               return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
> +       case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> +               return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
> +       case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> +               return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
> +       case POWER_SUPPLY_PROP_USB_TYPE:
> +               val->intval = priv->psy_usb_type;
> +               return 0;
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
> +static int mt6370_chg_set_property(struct power_supply *psy,
> +                                  enum power_supply_property psp,
> +                                  const union power_supply_propval *val)
> +{
> +       struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +
> +       switch (psp) {
> +       case POWER_SUPPLY_PROP_ONLINE:
> +               return mt6370_chg_set_online(priv, val);
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> +               return mt6370_chg_field_set(priv, F_ICHG, val->intval);
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> +               return mt6370_chg_field_set(priv, F_VOREG, val->intval);
> +       case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> +               return mt6370_chg_field_set(priv, F_IAICR, val->intval);
> +       case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> +               return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
> +       case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> +               return mt6370_chg_field_set(priv, F_IPREC, val->intval);
> +       case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> +               return mt6370_chg_field_set(priv, F_IEOC, val->intval);
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
> +static int mt6370_chg_property_is_writeable(struct power_supply *psy,
> +                                           enum power_supply_property psp)
> +{
> +       switch (psp) {
> +       case POWER_SUPPLY_PROP_ONLINE:
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> +       case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> +       case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> +       case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> +       case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> +               return 1;
> +       default:
> +               return 0;
> +       }
> +}
> +
> +static enum power_supply_property mt6370_chg_properties[] = {
> +       POWER_SUPPLY_PROP_ONLINE,
> +       POWER_SUPPLY_PROP_STATUS,
> +       POWER_SUPPLY_PROP_CHARGE_TYPE,
> +       POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
> +       POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
> +       POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
> +       POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
> +       POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
> +       POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
> +       POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
> +       POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
> +       POWER_SUPPLY_PROP_USB_TYPE,
> +};
> +
> +static enum power_supply_usb_type mt6370_chg_usb_types[] = {
> +       POWER_SUPPLY_USB_TYPE_UNKNOWN,
> +       POWER_SUPPLY_USB_TYPE_SDP,
> +       POWER_SUPPLY_USB_TYPE_CDP,
> +       POWER_SUPPLY_USB_TYPE_DCP,
> +};
> +
> +static const struct power_supply_desc mt6370_chg_psy_desc = {
> +       .name = "mt6370-charger",
> +       .type = POWER_SUPPLY_TYPE_USB,
> +       .properties = mt6370_chg_properties,
> +       .num_properties = ARRAY_SIZE(mt6370_chg_properties),
> +       .get_property = mt6370_chg_get_property,
> +       .set_property = mt6370_chg_set_property,
> +       .property_is_writeable = mt6370_chg_property_is_writeable,
> +       .usb_types = mt6370_chg_usb_types,
> +       .num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
> +};
> +
> +static const struct regulator_ops mt6370_chg_otg_ops = {
> +       .list_voltage = regulator_list_voltage_linear,
> +       .enable = regulator_enable_regmap,
> +       .disable = regulator_disable_regmap,
> +       .is_enabled = regulator_is_enabled_regmap,
> +       .set_voltage_sel = regulator_set_voltage_sel_regmap,
> +       .get_voltage_sel = regulator_get_voltage_sel_regmap,
> +       .set_current_limit = regulator_set_current_limit_regmap,
> +       .get_current_limit = regulator_get_current_limit_regmap,
> +};
> +
> +static const u32 mt6370_chg_otg_oc_ma[] = {
> +       500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
> +};
> +
> +static const struct regulator_desc mt6370_chg_otg_rdesc = {
> +       .of_match = "usb-otg-vbus-regulator",
> +       .of_parse_cb = mt6370_chg_otg_of_parse_cb,
> +       .name = "mt6370-usb-otg-vbus",
> +       .ops = &mt6370_chg_otg_ops,
> +       .owner = THIS_MODULE,
> +       .type = REGULATOR_VOLTAGE,
> +       .min_uV = 4425000,
> +       .uV_step = 25000,
> +       .n_voltages = 57,
> +       .vsel_reg = MT6370_REG_CHG_CTRL5,
> +       .vsel_mask = MT6370_VOBST_MASK,
> +       .enable_reg = MT6370_REG_CHG_CTRL1,
> +       .enable_mask = MT6370_OPA_MODE_MASK,
> +       .curr_table = mt6370_chg_otg_oc_ma,
> +       .n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
> +       .csel_reg = MT6370_REG_CHG_CTRL10,
> +       .csel_mask = MT6370_OTG_OC_MASK,
> +};
> +
> +static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
> +{
> +       int i;
> +       const struct mt6370_chg_field *fds = mt6370_chg_fields;
> +
> +       for (i = 0; i < F_MAX; i++) {
> +               priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
> +                                                              priv->regmap,
> +                                                              fds[i].field);
> +               if (IS_ERR(priv->rmap_fields[i]))
> +                       return dev_err_probe(priv->dev,
> +                                       PTR_ERR(priv->rmap_fields[i]),
> +                                       "Failed to allocate regmapfield[%s]\n",
> +                                       fds[i].name);
> +       }
> +
> +       return 0;
> +}
> +
> +static int mt6370_chg_init_setting(struct mt6370_priv *priv)
> +{
> +       int ret;
> +
> +       /* Disable usb_chg_en */
> +       ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to disable usb_chg_en\n");
> +               return ret;
> +       }
> +
> +       /* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
> +       ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to set ICHG to 900mA");
> +               return ret;
> +       }
> +
> +       /* Change input current limit selection to using IAICR results */
> +       ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 3);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to set IINLMTSEL\n");
> +               return ret;
> +       }
> +
> +       return 0;
> +}
> +
> +#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field)  \
> +{                                                      \
> +       .name = "mediatek,chg-" #_name,                 \
> +       .type = MT6370_PARSE_TYPE_##_type,              \
> +       .fd = _field,                                   \
> +}
> +
> +static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
> +{
> +       struct regulator_config rcfg = {
> +               .dev = priv->dev,
> +               .regmap = priv->regmap,
> +               .driver_data = priv,
> +       };
> +
> +       priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
> +                                            &rcfg);
> +
> +       return PTR_ERR_OR_ZERO(priv->rdev);
> +}
> +
> +static int mt6370_chg_init_psy(struct mt6370_priv *priv)
> +{
> +       struct power_supply_config cfg = {
> +               .drv_data = priv,
> +               .of_node = dev_of_node(priv->dev),
> +       };
> +
> +       priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
> +                                              &cfg);
> +
> +       return PTR_ERR_OR_ZERO(priv->psy);
> +}
> +
> +static void mt6370_chg_destroy_attach_lock(void *data)
> +{
> +       struct mutex *attach_lock = data;
> +
> +       mutex_destroy(attach_lock);
> +}
> +
> +static void mt6370_chg_destroy_wq(void *data)
> +{
> +       struct workqueue_struct *wq = data;
> +
> +       flush_workqueue(wq);
> +       destroy_workqueue(wq);
> +}
> +
> +static void mt6370_chg_cancel_mivr_dwork(void *data)
> +{
> +       struct delayed_work *mivr_dwork = data;
> +
> +       cancel_delayed_work_sync(mivr_dwork);
> +}
> +
> +static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
> +{
> +       struct mt6370_priv *priv = data;
> +       unsigned int otg_en;
> +       int ret;
> +
> +       /* Check in OTG mode or not */
> +       ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> +       if (ret) {
> +               dev_err(priv->dev, "Failed to get OTG state\n");
> +               return IRQ_NONE;
> +       }
> +
> +       if (otg_en)
> +               return IRQ_HANDLED;
> +
> +       mutex_lock(&priv->attach_lock);
> +       priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
> +       mutex_unlock(&priv->attach_lock);
> +
> +       if (!queue_work(priv->wq, &priv->bc12_work))
> +               dev_err(priv->dev, "bc12 work has already queued\n");
> +
> +       return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
> +{
> +       struct mt6370_priv *priv = data;
> +
> +       mt6370_chg_pwr_rdy_check(priv);
> +
> +       return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mt6370_mivr_handler(int irq, void *data)
> +{
> +       struct mt6370_priv *priv = data;
> +
> +       pm_stay_awake(priv->dev);
> +       disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
> +       schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
> +
> +       return IRQ_HANDLED;
> +}
> +
> +#define MT6370_CHG_IRQ(_name)                                          \
> +{                                                                      \
> +       .name = #_name,                                                 \
> +       .handler = mt6370_##_name##_handler,                            \
> +}
> +
> +static int mt6370_chg_init_irq(struct mt6370_priv *priv)
> +{
> +       int i, ret;
> +       const struct {
> +               char *name;
> +               irq_handler_t handler;
> +       } mt6370_chg_irqs[] = {
> +               MT6370_CHG_IRQ(attach_i),
> +               MT6370_CHG_IRQ(uvp_d_evt),
> +               MT6370_CHG_IRQ(mivr),
> +       };
> +
> +       for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
> +               ret = platform_get_irq_byname(to_platform_device(priv->dev),
> +                                             mt6370_chg_irqs[i].name);
> +               if (ret < 0)
> +                       return dev_err_probe(priv->dev, ret,
> +                                            "Failed to get irq %s\n",
> +                                            mt6370_chg_irqs[i].name);
> +
> +               priv->irq_nums[i] = ret;
> +               ret = devm_request_threaded_irq(priv->dev, ret, NULL,
> +                                               mt6370_chg_irqs[i].handler,
> +                                               IRQF_TRIGGER_FALLING,
> +                                               dev_name(priv->dev), priv);
> +               if (ret)
> +                       return dev_err_probe(priv->dev, ret,
> +                                            "Failed to request irq %s\n",
> +                                            mt6370_chg_irqs[i].name);
> +       }
> +
> +       return 0;
> +}
> +
> +static int mt6370_chg_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       struct mt6370_priv *priv;
> +       int ret;
> +
> +       priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +       if (!priv)
> +               return -ENOMEM;
> +
> +       priv->dev = &pdev->dev;
> +
> +       priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> +       if (!priv->regmap)
> +               return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> +
> +       ret = mt6370_chg_init_rmap_fields(priv);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
> +
> +       platform_set_drvdata(pdev, priv);
> +
> +       priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
> +       if (IS_ERR(priv->iio_adcs))
> +               return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
> +                                    "Failed to get iio adc\n");
> +
> +       ret = mt6370_chg_init_otg_regulator(priv);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
> +
> +       ret = mt6370_chg_init_psy(priv);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to init psy\n");
> +
> +       mutex_init(&priv->attach_lock);
> +       ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
> +                                      &priv->attach_lock);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to init attach lock\n");
> +
> +       priv->attach = MT6370_ATTACH_STAT_DETACH;
> +
> +       priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
> +       if (IS_ERR(priv->wq))
> +               return dev_err_probe(dev, PTR_ERR(priv->wq),
> +                                    "Failed to create workqueue\n");
> +
> +       ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to init wq\n");
> +
> +       INIT_WORK(&priv->bc12_work, mt6370_chg_bc12_work_func);
> +       INIT_DELAYED_WORK(&priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
> +       ret = devm_add_action_or_reset(dev, mt6370_chg_cancel_mivr_dwork,
> +                                      &priv->mivr_dwork);
> +       if (ret)
> +               return dev_err_probe(dev, ret, "Failed to init mivr dwork\n");
> +
> +       ret = mt6370_chg_init_setting(priv);
> +       if (ret)
> +               return dev_err_probe(dev, ret,
> +                                    "Failed to init mt6370 charger setting\n");
> +
> +       ret = mt6370_chg_init_irq(priv);
> +       if (ret)
> +               return ret;
> +
> +       mt6370_chg_pwr_rdy_check(priv);
> +
> +       return 0;
> +}
> +
> +static const struct of_device_id mt6370_chg_of_match[] = {
> +       { .compatible = "mediatek,mt6370-charger", },
> +       {}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
> +
> +static struct platform_driver mt6370_chg_driver = {
> +       .probe = mt6370_chg_probe,
> +       .driver = {
> +               .name = "mt6370-charger",
> +               .of_match_table = mt6370_chg_of_match,
> +       },
> +};
> +module_platform_driver(mt6370_chg_driver);
> +
> +MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
> +MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>


-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v7 11/13] leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator support

[Andy Shevchenko]

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiYuan Huang <cy_huang@richtek.com>
>
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual
> Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
>
> Add a support for the MediaTek MT6370 Current Sink Type LED Indicator

Add support

(This is also for all other commit messages)

> driver. It can control four channels current-sink RGB LEDs with 3 modes,

3 modes:

> constant current, PWM, and breath mode.

...

> +static int mt6370_gen_breath_pattern(struct mt6370_priv *priv,
> +                                    struct led_pattern *pattern, u32 len,
> +                                    u8 *pattern_val, u32 val_len)
> +{
> +       enum mt6370_led_ranges sel_range;
> +       struct led_pattern *curr;
> +       unsigned int sel;
> +       u32 val = 0;
> +       int i;
> +
> +       if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
> +               return -EINVAL;
> +
> +       /*
> +        * Pattern list
> +        * tr1:  byte 0, b'[7: 4]
> +        * tr2:  byte 0, b'[3: 0]
> +        * tf1:  byte 1, b'[7: 4]
> +        * tf2:  byte 1, b'[3: 0]
> +        * ton:  byte 2, b'[7: 4]
> +        * toff: byte 2, b'[3: 0]
> +        */
> +       for (i = 0; i < P_MAX_PATTERNS; i++) {
> +               curr = pattern + i;
> +
> +               sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
> +
> +               linear_range_get_selector_within(priv->ranges + sel_range,
> +                                                curr->delta_t, &sel);
> +
> +               val <<= i % 2 == 0 ? 8 : 0;
> +               val |= sel << (i % 2 == 0 ? 4 : 0);

It's too cryptic, why not simply:

  if (i % 2) {
    val |= sel;
  } else {
    val <<= 8;
    val |= sel << 4;
  }

?

> +       }
> +
> +       put_unaligned_be24(val, pattern_val);
> +
> +       return 0;
> +}

...

> +       const char * const states[] = { "off", "keep", "on" };

> +       ret = fwnode_property_read_string(init_data->fwnode, "default-state",
> +                                         &stat_str);
> +       if (!ret) {
> +               ret = match_string(states, ARRAY_SIZE(states), stat_str);
> +               if (ret < 0)
> +                       ret = STATE_OFF;
> +
> +               led->default_state = ret;
> +       }

Replace this by using led_init_default_state_get().

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v7 13/13] video: backlight: mt6370: Add MediaTek MT6370 support

[Andy Shevchenko]

On Fri, Aug 5, 2022 at 9:08 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiaEn Wu <chiaen_wu@richtek.com>
>
> MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> driver, display bias voltage supply, one general purpose LDO, and the
> USB Type-C & PD controller complies with the latest USB Type-C and PD
> standards.
>
> Add a support for the MediaTek MT6370 backlight driver.
> It controls 4 channels of 8 series WLEDs in
> 2048 (only for MT6370/MT6371) / 16384 (only for MT6372)
> current steps (30 mA) in exponential or linear mapping curves.

...

> +#include <linux/backlight.h>
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/kernel.h>
> +#include <linux/minmax.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>

> +#include <linux/of_device.h>

Why? Since below drop this and use fully fwnode / device property APIs.

> +#include <linux/platform_device.h>

Missed property.h which is heavily used in.the driver

> +#include <linux/regmap.h>

...

> +       /*
> +        * MT6372 uses 14 bits to control the brightness but MT6370 and MT6371
> +        * use 11 bits. They are different so we have to use this function to
> +        * check the vendor ID and use different mask, shift and default
> +        * maxiimum brightness value.

Use spell-checker for all your patches.

> +        */

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v7 12/13] leds: flash: mt6370: Add MediaTek MT6370 flashlight support

[Andy Shevchenko]

On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: Alice Chen <alice_chen@richtek.com>
>
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual Flash
> LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
>
> Add a support for the MT6370 Flash LED driver. Flash LED in MT6370
> has 2 channels and support torch/strobe mode.

Same comments as per previous LED related patch.

...

> +       /*
> +        * For the flash to turn on/off, we need to wait HW ramping up/down time
> +        * 5ms/500us to prevent the unexpected problem.
> +        */
> +       if (!priv->fled_strobe_used && curr)
> +               usleep_range(5000, 6000);
> +       else if (priv->fled_strobe_used && !curr)
> +               usleep_range(500, 600);

Now it's much better!

...

> +       /*
> +        * Always configure as min level when off to
> +        * prevent flash current spike

/*
 * You need to check the style
 * of multi-line comments like
 * this one.
 */

> +        */

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v7 08/13] usb: typec: tcpci_mt6370: Add MediaTek MT6370 tcpci driver

[Heikki Krogerus]

On Fri, Aug 05, 2022 at 03:06:05PM +0800, ChiaEn Wu wrote:
> From: ChiYuan Huang <cy_huang@richtek.com>
> 
> The MediaTek MT6370 is a highly-integrated smart power management IC,
> which includes a single cell Li-Ion/Li-Polymer switching battery
> charger, a USB Type-C & Power Delivery (PD) controller, dual
> Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> a display bias driver and a general LDO for portable devices.
> 
> Add a support for the Type-C & Power Delivery controller in
> MediaTek MT6370 IC.
> 
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> 
> v7
> - Revise 'devm_add_action_or_reset(dev, ...)' to one line
> - Revise 'return regmap_update_bits(...)' with using positive
>   conditional
> ---
>  drivers/usb/typec/tcpm/Kconfig        |  11 ++
>  drivers/usb/typec/tcpm/Makefile       |   1 +
>  drivers/usb/typec/tcpm/tcpci_mt6370.c | 207 ++++++++++++++++++++++++++++++++++
>  3 files changed, 219 insertions(+)
>  create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c
> 
> diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
> index 073fd2e..e6b88ca 100644
> --- a/drivers/usb/typec/tcpm/Kconfig
> +++ b/drivers/usb/typec/tcpm/Kconfig
> @@ -35,6 +35,17 @@ config TYPEC_MT6360
>  	  USB Type-C. It works with Type-C Port Controller Manager
>  	  to provide USB PD and USB Type-C functionalities.
>  
> +config TYPEC_TCPCI_MT6370
> +	tristate "MediaTek MT6370 Type-C driver"
> +	depends on MFD_MT6370
> +	help
> +	  MediaTek MT6370 is a multi-functional IC that includes
> +	  USB Type-C. It works with Type-C Port Controller Manager
> +	  to provide USB PD and USB Type-C functionalities.
> +
> +	  This driver can also be built as a module. The module
> +	  will be called "tcpci_mt6370".
> +
>  config TYPEC_TCPCI_MAXIM
>  	tristate "Maxim TCPCI based Type-C chip driver"
>  	help
> diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile
> index 7d499f3..906d9dc 100644
> --- a/drivers/usb/typec/tcpm/Makefile
> +++ b/drivers/usb/typec/tcpm/Makefile
> @@ -6,4 +6,5 @@ typec_wcove-y				:= wcove.o
>  obj-$(CONFIG_TYPEC_TCPCI)		+= tcpci.o
>  obj-$(CONFIG_TYPEC_RT1711H)		+= tcpci_rt1711h.o
>  obj-$(CONFIG_TYPEC_MT6360)		+= tcpci_mt6360.o
> +obj-$(CONFIG_TYPEC_TCPCI_MT6370)	+= tcpci_mt6370.o
>  obj-$(CONFIG_TYPEC_TCPCI_MAXIM)		+= tcpci_maxim.o
> diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c
> new file mode 100644
> index 0000000..c5bb201
> --- /dev/null
> +++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c
> @@ -0,0 +1,207 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2022 Richtek Technology Corp.
> + *
> + * Author: ChiYuan Huang <cy_huang@richtek.com>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_wakeup.h>
> +#include <linux/pm_wakeirq.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/usb/tcpci.h>
> +#include <linux/usb/tcpm.h>
> +
> +#define MT6370_REG_SYSCTRL8	0x9B
> +
> +#define MT6370_AUTOIDLE_MASK	BIT(3)
> +
> +#define MT6370_VENDOR_ID	0x29CF
> +#define MT6370_TCPC_DID_A	0x2170
> +
> +struct mt6370_priv {
> +	struct device *dev;
> +	struct regulator *vbus;
> +	struct tcpci *tcpci;
> +	struct tcpci_data tcpci_data;
> +};
> +
> +static const struct reg_sequence mt6370_reg_init[] = {
> +	REG_SEQ(0xA0, 0x1, 1000),
> +	REG_SEQ(0x81, 0x38, 0),
> +	REG_SEQ(0x82, 0x82, 0),
> +	REG_SEQ(0xBA, 0xFC, 0),
> +	REG_SEQ(0xBB, 0x50, 0),
> +	REG_SEQ(0x9E, 0x8F, 0),
> +	REG_SEQ(0xA1, 0x5, 0),
> +	REG_SEQ(0xA2, 0x4, 0),
> +	REG_SEQ(0xA3, 0x4A, 0),
> +	REG_SEQ(0xA4, 0x01, 0),
> +	REG_SEQ(0x95, 0x01, 0),
> +	REG_SEQ(0x80, 0x71, 0),
> +	REG_SEQ(0x9B, 0x3A, 1000),
> +};
> +
> +static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data)
> +{
> +	u16 did;
> +	int ret;
> +
> +	ret = regmap_register_patch(data->regmap, mt6370_reg_init,
> +				    ARRAY_SIZE(mt6370_reg_init));
> +	if (ret)
> +		return ret;
> +
> +	ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16));
> +	if (ret)
> +		return ret;
> +
> +	if (did == MT6370_TCPC_DID_A)
> +		return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80);
> +
> +	return 0;
> +}
> +
> +static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data,
> +				 bool enable)
> +{
> +	return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8,
> +				  MT6370_AUTOIDLE_MASK,
> +				  enable ? 0 : MT6370_AUTOIDLE_MASK);
> +}
> +
> +static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data,
> +				bool source, bool sink)
> +{
> +	struct mt6370_priv *priv = container_of(data, struct mt6370_priv,
> +						tcpci_data);
> +	int ret;
> +
> +	ret = regulator_is_enabled(priv->vbus);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (ret && !source)
> +		return regulator_disable(priv->vbus);
> +
> +	if (!ret && source)
> +		return regulator_enable(priv->vbus);
> +
> +	return 0;
> +}
> +
> +static irqreturn_t mt6370_irq_handler(int irq, void *dev_id)
> +{
> +	struct mt6370_priv *priv = dev_id;
> +
> +	return tcpci_irq(priv->tcpci);
> +}
> +
> +static int mt6370_check_vendor_info(struct mt6370_priv *priv)
> +{
> +	struct regmap *regmap = priv->tcpci_data.regmap;
> +	u16 vid;
> +	int ret;
> +
> +	ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16));
> +	if (ret)
> +		return ret;
> +
> +	if (vid != MT6370_VENDOR_ID)
> +		return dev_err_probe(priv->dev, -ENODEV,
> +				     "Vendor ID not correct 0x%02x\n", vid);
> +
> +	return 0;
> +}
> +
> +static void mt6370_unregister_tcpci_port(void *tcpci)
> +{
> +	tcpci_unregister_port(tcpci);
> +}
> +
> +static int mt6370_tcpc_probe(struct platform_device *pdev)
> +{
> +	struct mt6370_priv *priv;
> +	struct device *dev = &pdev->dev;
> +	int irq, ret;
> +
> +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	priv->dev = dev;
> +
> +	priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL);
> +	if (!priv->tcpci_data.regmap)
> +		return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n");
> +
> +	ret = mt6370_check_vendor_info(priv);
> +	if (ret)
> +		return ret;
> +
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq < 0)
> +		return dev_err_probe(dev, irq, "Failed to get irq\n");
> +
> +	/* Assign TCPCI feature and ops */
> +	priv->tcpci_data.auto_discharge_disconnect = 1;
> +	priv->tcpci_data.init = mt6370_tcpc_init;
> +	priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn;
> +
> +	priv->vbus = devm_regulator_get_optional(dev, "vbus");
> +	if (!IS_ERR(priv->vbus))
> +		priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus;
> +
> +	priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data);
> +	if (IS_ERR(priv->tcpci))
> +		return dev_err_probe(dev, PTR_ERR(priv->tcpci),
> +				     "Failed to register tcpci port\n");
> +
> +	ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci);
> +	if (ret)
> +		return ret;
> +
> +	ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler,
> +					IRQF_ONESHOT, dev_name(dev), priv);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Failed to allocate irq\n");
> +
> +	device_init_wakeup(dev, true);
> +	dev_pm_set_wake_irq(dev, irq);
> +
> +	return 0;
> +}
> +
> +static int mt6370_tcpc_remove(struct platform_device *pdev)
> +{
> +	dev_pm_clear_wake_irq(&pdev->dev);
> +	device_init_wakeup(&pdev->dev, false);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id mt6370_tcpc_devid_table[] = {
> +	{ .compatible = "mediatek,mt6370-tcpc" },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table);
> +
> +static struct platform_driver mt6370_tcpc_driver = {
> +	.driver = {
> +		.name = "mt6370-tcpc",
> +		.of_match_table = mt6370_tcpc_devid_table,
> +	},
> +	.probe = mt6370_tcpc_probe,
> +	.remove = mt6370_tcpc_remove,
> +};
> +module_platform_driver(mt6370_tcpc_driver);
> +
> +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
> +MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver");
> +MODULE_LICENSE("GPL v2");
> -- 
> 2.7.4

-- 
heikki

Re: [PATCH v7 06/13] dt-bindings: mfd: Add MediaTek MT6370

[Lee Jones]

On Fri, 05 Aug 2022, ChiaEn Wu wrote:

> From: ChiYuan Huang <cy_huang@richtek.com>
> 
> Add MediaTek MT6370 binding documentation.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> ---
>  .../devicetree/bindings/mfd/mediatek,mt6370.yaml   | 280 +++++++++++++++++++++
>  include/dt-bindings/iio/adc/mediatek,mt6370_adc.h  |  18 ++
>  2 files changed, 298 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
>  create mode 100644 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h

Applied, thanks.

-- 
DEPRECATED: Please use lee@kernel.org

Re: [PATCH v7 07/13] mfd: mt6370: Add MediaTek MT6370 support

[Lee Jones]

On Fri, 05 Aug 2022, ChiaEn Wu wrote:

> From: ChiYuan Huang <cy_huang@richtek.com>
> 
> This adds support for the MediaTek MT6370 SubPMIC. MediaTek MT6370 is a
> SubPMIC consisting of a single cell battery charger with ADC monitoring,
> RGB LEDs, dual channel flashlight, WLED backlight driver, display bias
> voltage supply, one general purpose LDO, and the USB Type-C & PD controller
> complies with the latest USB Type-C and PD standards.
> 
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> ---
> 
> v7
> - Move '#define MT6370_REG_MAXADDR' to the next line of
>   '#define MT6370_REG_CHG_MASK1'
> - Rename 'MT6370_REG_ADDRLEN' to 'MT6370_MAX_ADDRLEN'
> ---
>  drivers/mfd/Kconfig  |  16 +++
>  drivers/mfd/Makefile |   1 +
>  drivers/mfd/mt6370.c | 312 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  drivers/mfd/mt6370.h |  99 ++++++++++++++++
>  4 files changed, 428 insertions(+)
>  create mode 100644 drivers/mfd/mt6370.c
>  create mode 100644 drivers/mfd/mt6370.h

Applied, thanks.

-- 
DEPRECATED: Please use lee@kernel.org

Re: [PATCH v7 09/13] iio: adc: mt6370: Add MediaTek MT6370 support

[Jonathan Cameron]

On Fri, 5 Aug 2022 12:54:04 +0200
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
> >
> > From: ChiaEn Wu <chiaen_wu@richtek.com>
> >
> > MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> > with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> > driver, display bias voltage supply, one general purpose LDO, and the
> > USB Type-C & PD controller complies with the latest USB Type-C and PD
> > standards.
> >
> > Add a support for the MT6370 ADC driver for system monitoring, including
> > charger current, voltage, and temperature.  
> 
> On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
> >
> > From: ChiYuan Huang <cy_huang@richtek.com>
> >
> > The MediaTek MT6370 is a highly-integrated smart power management IC,
> > which includes a single cell Li-Ion/Li-Polymer switching battery
> > charger, a USB Type-C & Power Delivery (PD) controller, dual
> > Flash LED current sources, a RGB LED driver, a backlight WLED driver,
> > a display bias driver and a general LDO for portable devices.
> >
> > Add a support for the Type-C & Power Delivery controller in
> > MediaTek MT6370 IC.  
> 
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Oops. I just noticed I replied only to Andy due to a misclick.

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

I took a quick glance through, and with Andy's comments now all answered
to his satisfaction I'm fine with this going through the MFD tree
(or another path if one makes more sense).

Thanks to Andy for his reviewing effort on this one!

Note that because of the bindings header I think this has a build dependency on the
MFD binding patch.

Jonathan


> 
> > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> > ---
> >
> > v7
> > - Add AICR(100mA ~ 350mA), ICHG(100mA ~ 800mA) macros
> > - Remove 400mA AICR and 900mA ICHG macros
> > - Revise using 'if-else' to 'switch-case' in mt6370_adc_read_scale()
> >   where the adc channel is ibus or ibat
> > ---
> >  drivers/iio/adc/Kconfig      |  12 ++
> >  drivers/iio/adc/Makefile     |   1 +
> >  drivers/iio/adc/mt6370-adc.c | 305 +++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 318 insertions(+)
> >  create mode 100644 drivers/iio/adc/mt6370-adc.c
> >
> > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> > index 7fe5930..995cbb5 100644
> > --- a/drivers/iio/adc/Kconfig
> > +++ b/drivers/iio/adc/Kconfig
> > @@ -736,6 +736,18 @@ config MEDIATEK_MT6360_ADC
> >           is used in smartphones and tablets and supports a 11 channel
> >           general purpose ADC.
> >
> > +config MEDIATEK_MT6370_ADC
> > +       tristate "MediaTek MT6370 ADC driver"
> > +       depends on MFD_MT6370
> > +       help
> > +         Say yes here to enable MediaTek MT6370 ADC support.
> > +
> > +         This ADC driver provides 9 channels for system monitoring (charger
> > +         current, voltage, and temperature).
> > +
> > +         This driver can also be built as a module. If so, the module
> > +         will be called "mt6370-adc".
> > +
> >  config MEDIATEK_MT6577_AUXADC
> >         tristate "MediaTek AUXADC driver"
> >         depends on ARCH_MEDIATEK || COMPILE_TEST
> > diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> > index 1772a54..c6bc35f 100644
> > --- a/drivers/iio/adc/Makefile
> > +++ b/drivers/iio/adc/Makefile
> > @@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o
> >  obj-$(CONFIG_MCP3422) += mcp3422.o
> >  obj-$(CONFIG_MCP3911) += mcp3911.o
> >  obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o
> > +obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o
> >  obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
> >  obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
> >  obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
> > diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c
> > new file mode 100644
> > index 0000000..2a46471
> > --- /dev/null
> > +++ b/drivers/iio/adc/mt6370-adc.c
> > @@ -0,0 +1,305 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright (C) 2022 Richtek Technology Corp.
> > + *
> > + * Author: ChiaEn Wu <chiaen_wu@richtek.com>
> > + */
> > +
> > +#include <linux/bits.h>
> > +#include <linux/bitfield.h>
> > +#include <linux/iio/iio.h>
> > +#include <linux/kernel.h>
> > +#include <linux/mod_devicetable.h>
> > +#include <linux/module.h>
> > +#include <linux/mutex.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/regmap.h>
> > +#include <linux/sysfs.h>
> > +#include <linux/units.h>
> > +
> > +#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
> > +
> > +#define MT6370_REG_CHG_CTRL3           0x113
> > +#define MT6370_REG_CHG_CTRL7           0x117
> > +#define MT6370_REG_CHG_ADC             0x121
> > +#define MT6370_REG_ADC_DATA_H          0x14C
> > +
> > +#define MT6370_ADC_START_MASK          BIT(0)
> > +#define MT6370_ADC_IN_SEL_MASK         GENMASK(7, 4)
> > +#define MT6370_AICR_ICHG_MASK          GENMASK(7, 2)
> > +
> > +#define MT6370_AICR_100_mA             0x0
> > +#define MT6370_AICR_150_mA             0x1
> > +#define MT6370_AICR_200_mA             0x2
> > +#define MT6370_AICR_250_mA             0x3
> > +#define MT6370_AICR_300_mA             0x4
> > +#define MT6370_AICR_350_mA             0x5
> > +
> > +#define MT6370_ICHG_100_mA             0x0
> > +#define MT6370_ICHG_200_mA             0x1
> > +#define MT6370_ICHG_300_mA             0x2
> > +#define MT6370_ICHG_400_mA             0x3
> > +#define MT6370_ICHG_500_mA             0x4
> > +#define MT6370_ICHG_600_mA             0x5
> > +#define MT6370_ICHG_700_mA             0x6
> > +#define MT6370_ICHG_800_mA             0x7
> > +
> > +#define ADC_CONV_TIME_MS               35
> > +#define ADC_CONV_POLLING_TIME_US       1000
> > +
> > +struct mt6370_adc_data {
> > +       struct device *dev;
> > +       struct regmap *regmap;
> > +       /*
> > +        * This mutex lock is for preventing the different ADC channels
> > +        * from being read at the same time.
> > +        */
> > +       struct mutex adc_lock;
> > +};
> > +
> > +static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
> > +                                  unsigned long addr, int *val)
> > +{
> > +       unsigned int reg_val;
> > +       __be16 be_val;
> > +       int ret;
> > +
> > +       mutex_lock(&priv->adc_lock);
> > +
> > +       reg_val = MT6370_ADC_START_MASK |
> > +                 FIELD_PREP(MT6370_ADC_IN_SEL_MASK, addr);
> > +       ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val);
> > +       if (ret)
> > +               goto adc_unlock;
> > +
> > +       msleep(ADC_CONV_TIME_MS);
> > +
> > +       ret = regmap_read_poll_timeout(priv->regmap,
> > +                                      MT6370_REG_CHG_ADC, reg_val,
> > +                                      !(reg_val & MT6370_ADC_START_MASK),
> > +                                      ADC_CONV_POLLING_TIME_US,
> > +                                      ADC_CONV_TIME_MS * MILLI * 3);
> > +       if (ret) {
> > +               dev_err(priv->dev, "Failed to read ADC register (%d)\n", ret);
> > +               goto adc_unlock;
> > +       }
> > +
> > +       ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H,
> > +                             &be_val, sizeof(be_val));
> > +       if (ret)
> > +               goto adc_unlock;
> > +
> > +       *val = be16_to_cpu(be_val);
> > +       ret = IIO_VAL_INT;
> > +
> > +adc_unlock:
> > +       mutex_unlock(&priv->adc_lock);
> > +
> > +       return ret;
> > +}
> > +
> > +static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
> > +                                int chan, int *val1, int *val2)
> > +{
> > +       unsigned int reg_val;
> > +       int ret;
> > +
> > +       switch (chan) {
> > +       case MT6370_CHAN_VBAT:
> > +       case MT6370_CHAN_VSYS:
> > +       case MT6370_CHAN_CHG_VDDP:
> > +               *val1 = 5;
> > +               return IIO_VAL_INT;
> > +       case MT6370_CHAN_IBUS:
> > +               ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, &reg_val);
> > +               if (ret)
> > +                       return ret;
> > +
> > +               reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> > +               switch (reg_val) {
> > +               case MT6370_AICR_100_mA:
> > +               case MT6370_AICR_150_mA:
> > +               case MT6370_AICR_200_mA:
> > +               case MT6370_AICR_250_mA:
> > +               case MT6370_AICR_300_mA:
> > +               case MT6370_AICR_350_mA:
> > +                       *val1 = 3350;
> > +                       break;
> > +               default:
> > +                       *val1 = 5000;
> > +                       break;
> > +               }
> > +
> > +               *val2 = 100;
> > +
> > +               return IIO_VAL_FRACTIONAL;
> > +       case MT6370_CHAN_IBAT:
> > +               ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, &reg_val);
> > +               if (ret)
> > +                       return ret;
> > +
> > +               reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val);
> > +               switch (reg_val) {
> > +               case MT6370_ICHG_100_mA:
> > +               case MT6370_ICHG_200_mA:
> > +               case MT6370_ICHG_300_mA:
> > +               case MT6370_ICHG_400_mA:
> > +                       *val1 = 2375;
> > +                       break;
> > +               case MT6370_ICHG_500_mA:
> > +               case MT6370_ICHG_600_mA:
> > +               case MT6370_ICHG_700_mA:
> > +               case MT6370_ICHG_800_mA:
> > +                       *val1 = 2680;
> > +                       break;
> > +               default:
> > +                       *val1 = 5000;
> > +                       break;
> > +               }
> > +
> > +               *val2 = 100;
> > +
> > +               return IIO_VAL_FRACTIONAL;
> > +       case MT6370_CHAN_VBUSDIV5:
> > +               *val1 = 25;
> > +               return IIO_VAL_INT;
> > +       case MT6370_CHAN_VBUSDIV2:
> > +               *val1 = 50;
> > +               return IIO_VAL_INT;
> > +       case MT6370_CHAN_TS_BAT:
> > +               *val1 = 25;
> > +               *val2 = 10000;
> > +               return IIO_VAL_FRACTIONAL;
> > +       case MT6370_CHAN_TEMP_JC:
> > +               *val1 = 2000;
> > +               return IIO_VAL_FRACTIONAL;
> > +       default:
> > +               return -EINVAL;
> > +       }
> > +}
> > +
> > +static int mt6370_adc_read_offset(struct mt6370_adc_data *priv,
> > +                                 int chan, int *val)
> > +{
> > +       *val = -20;
> > +
> > +       return IIO_VAL_INT;
> > +}
> > +
> > +static int mt6370_adc_read_raw(struct iio_dev *iio_dev,
> > +                              const struct iio_chan_spec *chan,
> > +                              int *val, int *val2, long mask)
> > +{
> > +       struct mt6370_adc_data *priv = iio_priv(iio_dev);
> > +
> > +       switch (mask) {
> > +       case IIO_CHAN_INFO_RAW:
> > +               return mt6370_adc_read_channel(priv, chan->channel,
> > +                                              chan->address, val);
> > +       case IIO_CHAN_INFO_SCALE:
> > +               return mt6370_adc_read_scale(priv, chan->channel, val, val2);
> > +       case IIO_CHAN_INFO_OFFSET:
> > +               return mt6370_adc_read_offset(priv, chan->channel, val);
> > +       default:
> > +               return -EINVAL;
> > +       }
> > +}
> > +
> > +static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = {
> > +       [MT6370_CHAN_VBUSDIV5] = "vbusdiv5",
> > +       [MT6370_CHAN_VBUSDIV2] = "vbusdiv2",
> > +       [MT6370_CHAN_VSYS] = "vsys",
> > +       [MT6370_CHAN_VBAT] = "vbat",
> > +       [MT6370_CHAN_TS_BAT] = "ts_bat",
> > +       [MT6370_CHAN_IBUS] = "ibus",
> > +       [MT6370_CHAN_IBAT] = "ibat",
> > +       [MT6370_CHAN_CHG_VDDP] = "chg_vddp",
> > +       [MT6370_CHAN_TEMP_JC] = "temp_jc",
> > +};
> > +
> > +static int mt6370_adc_read_label(struct iio_dev *iio_dev,
> > +                                struct iio_chan_spec const *chan, char *label)
> > +{
> > +       return sysfs_emit(label, "%s\n", mt6370_channel_labels[chan->channel]);
> > +}
> > +
> > +static const struct iio_info mt6370_adc_iio_info = {
> > +       .read_raw = mt6370_adc_read_raw,
> > +       .read_label = mt6370_adc_read_label,
> > +};
> > +
> > +#define MT6370_ADC_CHAN(_idx, _type, _addr, _extra_info) {     \
> > +       .type = _type,                                          \
> > +       .channel = MT6370_CHAN_##_idx,                          \
> > +       .address = _addr,                                       \
> > +       .scan_index = MT6370_CHAN_##_idx,                       \
> > +       .indexed = 1,                                           \
> > +       .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |          \
> > +                             BIT(IIO_CHAN_INFO_SCALE) |        \
> > +                             _extra_info,                      \
> > +}
> > +
> > +static const struct iio_chan_spec mt6370_adc_channels[] = {
> > +       MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1, 0),
> > +       MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2, 0),
> > +       MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3, 0),
> > +       MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4, 0),
> > +       MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6, 0),
> > +       MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8, 0),
> > +       MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9, 0),
> > +       MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11, 0),
> > +       MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
> > +};
> > +
> > +static int mt6370_adc_probe(struct platform_device *pdev)
> > +{
> > +       struct device *dev = &pdev->dev;
> > +       struct mt6370_adc_data *priv;
> > +       struct iio_dev *indio_dev;
> > +       struct regmap *regmap;
> > +       int ret;
> > +
> > +       regmap = dev_get_regmap(pdev->dev.parent, NULL);
> > +       if (!regmap)
> > +               return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
> > +
> > +       indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
> > +       if (!indio_dev)
> > +               return -ENOMEM;
> > +
> > +       priv = iio_priv(indio_dev);
> > +       priv->dev = dev;
> > +       priv->regmap = regmap;
> > +       mutex_init(&priv->adc_lock);
> > +
> > +       ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
> > +       if (ret)
> > +               return dev_err_probe(dev, ret, "Failed to reset ADC\n");
> > +
> > +       indio_dev->name = "mt6370-adc";
> > +       indio_dev->info = &mt6370_adc_iio_info;
> > +       indio_dev->modes = INDIO_DIRECT_MODE;
> > +       indio_dev->channels = mt6370_adc_channels;
> > +       indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels);
> > +
> > +       return devm_iio_device_register(dev, indio_dev);
> > +}
> > +
> > +static const struct of_device_id mt6370_adc_of_id[] = {
> > +       { .compatible = "mediatek,mt6370-adc", },
> > +       {}
> > +};
> > +MODULE_DEVICE_TABLE(of, mt6370_adc_of_id);
> > +
> > +static struct platform_driver mt6370_adc_driver = {
> > +       .driver = {
> > +               .name = "mt6370-adc",
> > +               .of_match_table = mt6370_adc_of_id,
> > +       },
> > +       .probe = mt6370_adc_probe,
> > +};
> > +module_platform_driver(mt6370_adc_driver);
> > +
> > +MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
> > +MODULE_DESCRIPTION("MT6370 ADC Driver");
> > +MODULE_LICENSE("GPL v2");
> > --
> > 2.7.4
> >  
> 
> 

Re: [PATCH v7 06/13] dt-bindings: mfd: Add MediaTek MT6370

[Jonathan Cameron]

On Tue, 9 Aug 2022 14:14:14 +0100
Lee Jones <lee.jones@linaro.org> wrote:

> On Fri, 05 Aug 2022, ChiaEn Wu wrote:
> 
> > From: ChiYuan Huang <cy_huang@richtek.com>
> > 
> > Add MediaTek MT6370 binding documentation.
> > 
> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> > Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> > ---
> >  .../devicetree/bindings/mfd/mediatek,mt6370.yaml   | 280 +++++++++++++++++++++
> >  include/dt-bindings/iio/adc/mediatek,mt6370_adc.h  |  18 ++
> >  2 files changed, 298 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
> >  create mode 100644 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h  
> 
> Applied, thanks.
> 
Hi Lee,

The iio: adc: patch is dependent on this (due to the binding header) -
so either you should pick that up as well, or it'll get delayed until what
you've picked up is available upstream - or I guess some hackery to allow them
to go via different trees and flip to the header only once all the prior steps
are in place.

Note I'd messed up sending an Ack on the ADC patch which I've now fixed.

Thanks,

Jonathan

Re: [PATCH v7 10/13] power: supply: mt6370: Add MediaTek MT6370 charger driver

[Matti Vaittinen]

Hi ChiaEn,

pe 5. elok. 2022 klo 10.09 ChiaEn Wu (peterwu.pub@gmail.com) kirjoitti:
>
> From: ChiaEn Wu <chiaen_wu@richtek.com>
>
> MediaTek MT6370 is a SubPMIC consisting of a single cell battery charger
> with ADC monitoring, RGB LEDs, dual channel flashlight, WLED backlight
> driver, display bias voltage supply, one general purpose LDO, and the
> USB Type-C & PD controller complies with the latest USB Type-C and PD
> standards.
>
> Add a support for the MediaTek MT6370 Charger driver. The charger module
> of MT6370 supports High-Accuracy Voltage/Current Regulation,
> Average Input Current Regulation, Battery Temperature Sensing,
> Over-Temperature Protection, DPDM Detection for BC1.2.
>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> ---
>
> +
> +#define MT6370_CHG_LINEAR_RANGE(_rfd, _min, _min_sel, _max_sel, _step) \
> +[_rfd] = {                                                             \
> +       .min = _min,                                                    \
> +       .min_sel = _min_sel,                                            \
> +       .max_sel = _max_sel,                                            \
> +       .step = _step,                                                  \
> +}

Just a minor thing but I think this macro could be useful also for
other drivers. Do you think you could rename it to LINEAR_RANGE_IDX()
(or some such) and move it to the linear_range.h? That would allow
also other drivers to use it instead of reinventing the wheel :)

Best Regards
  -- Matti Vaittinen



---

Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

~~ When things go utterly wrong vim users can always type :help! ~~

Re: [PATCH v7 06/13] dt-bindings: mfd: Add MediaTek MT6370

[Rob Herring]

On Tue, Aug 9, 2022 at 7:14 AM Lee Jones <lee.jones@linaro.org> wrote:
>
> On Fri, 05 Aug 2022, ChiaEn Wu wrote:
>
> > From: ChiYuan Huang <cy_huang@richtek.com>
> >
> > Add MediaTek MT6370 binding documentation.
> >
> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> > Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> > ---
> >  .../devicetree/bindings/mfd/mediatek,mt6370.yaml   | 280 +++++++++++++++++++++
> >  include/dt-bindings/iio/adc/mediatek,mt6370_adc.h  |  18 ++
> >  2 files changed, 298 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
> >  create mode 100644 include/dt-bindings/iio/adc/mediatek,mt6370_adc.h
>
> Applied, thanks.

Without the backlight schema applied, this is the result:

./Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml: Unable
to find schema file matching $id:
http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml
/builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.example.dtb:
pmic@34: backlight: False schema does not allow {'compatible':
['mediatek,mt6370-backlight'], 'mediatek,bled-channel-use': b'\x0f'}
 From schema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
/builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.example.dtb:
pmic@34: charger: False schema does not allow {'compatible':
['mediatek,mt6370-charger'], 'interrupts': [[48], [68], [6]],
'interrupt-names': ['attach_i', 'uvp_d_evt', 'mivr'], 'io-channels':
[[1, 5]], 'usb-otg-vbus-regulator': {'regulator-name':
['mt6370-usb-otg-vbus'], 'regulator-min-microvolt': [[4350000]],
'regulator-max-microvolt': [[5800000]], 'regulator-min-microamp':
[[500000]], 'regulator-max-microamp': [[3000000]], 'phandle': [[2]]}}
 From schema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
/builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.example.dtb:
pmic@34: tcpc: False schema does not allow {'compatible':
['mediatek,mt6370-tcpc'], 'interrupts-extended': [[4294967295, 4, 8]],
'connector': {'compatible': ['usb-c-connector'], 'label': ['USB-C'],
'vbus-supply': [[2]], 'data-role': ['dual'], 'power-role': ['dual'],
'try-power-role': ['sink'], 'source-pdos': [[570527844]], 'sink-pdos':
[[570527944]], 'op-sink-microwatt': [[10000000]], 'ports':
{'#address-cells': [[1]], '#size-cells': [[0]], 'port@0': {'reg':
[[0]], 'endpoint': {'remote-endpoint': [[4294967295]]}}, 'port@1':
{'reg': [[1]], 'endpoint': {'remote-endpoint': [[4294967295]]}},
'port@2': {'reg': [[2]], 'endpoint': {'remote-endpoint':
[[4294967295]]}}}}}
 From schema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
/builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.example.dtb:
pmic@34: indicator: False schema does not allow {'compatible':
['mediatek,mt6370-indicator'], '#address-cells': [[1]], '#size-cells':
[[0]], 'multi-led@0': {'reg': [[0]], 'function': ['indicator'],
'color': [[9]], 'led-max-microamp': [[24000]], '#address-cells':
[[1]], '#size-cells': [[0]], 'led@0': {'reg': [[0]], 'color': [[1]]},
'led@1': {'reg': [[1]], 'color': [[2]]}, 'led@2': {'reg': [[2]],
'color': [[3]]}}, 'led@3': {'reg': [[3]], 'function': ['indicator'],
'color': [[0]], 'led-max-microamp': [[6000]]}}
 From schema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
/builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.example.dtb:
pmic@34: flashlight: False schema does not allow {'compatible':
['mediatek,mt6370-flashlight'], '#address-cells': [[1]],
'#size-cells': [[0]], 'led@0': {'reg': [[0]], 'led-sources': [[0]],
'function': ['flash'], 'color': [[0]], 'function-enumerator': [[1]],
'led-max-microamp': [[200000]], 'flash-max-microamp': [[500000]],
'flash-max-timeout-us': [[1248000]]}, 'led@1': {'reg': [[1]],
'led-sources': [[1]], 'function': ['flash'], 'color': [[0]],
'function-enumerator': [[2]], 'led-max-microamp': [[200000]],
'flash-max-microamp': [[500000]], 'flash-max-timeout-us':
[[1248000]]}}
 From schema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
/builds/robherring/linux-dt/Documentation/devicetree/bindings/mfd/mediatek,mt6370.example.dtb:
backlight: mediatek,bled-channel-use: b'\x0f' is not of type 'object',
'array', 'boolean', 'null'
 From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/dt-core.yaml