[PATCH v12 0/5] Add MediaTek MT6370 PMIC support

[PATCH v12 0/5] Add MediaTek MT6370 PMIC support

[ChiaEn Wu]

From: ChiaEn Wu <chiaen_wu@richtek.com>

This patch series add MediaTek MT6370 PMIC support and add a index macro
to <linear_range.h>. 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.

First, in this series of patches,
- 'dt-binding: mfd' and 'mfd driver' have been applied by Lee in the v7.
  https://lore.kernel.org/all/YvJdpq0MWNPQZw5c@google.com/
  https://lore.kernel.org/all/YvJdxEpC2cB58Bq9@google.com/

- 'tcpci driver' has been applied by Greg in the v8.
  https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?h=usb-next&id=c2a8ea5997fdfeb43eda259d5533234c3cae05d7

- 'dt-binding: backlight' and 'backlight driver' have been applied
  by Lee in v9.
  https://lore.kernel.org/all/YxYSDSlnOELL2mPF@google.com/
  https://lore.kernel.org/all/YxYS7%2FdZI69lMXeh@google.com/

- 'dt-binding: charger', 'charger driver' and 'linear_range.h' patch have
  been applied by Sebastian in v11.
  https://lore.kernel.org/all/20220920160857.6qfi66gtmgwesq7g@mercury.elektranox.org/
  https://lore.kernel.org/all/20220920161218.dkkfvfomrruebahi@mercury.elektranox.org/
  https://lore.kernel.org/all/20220920161238.dswtmyon462324dm@mercury.elektranox.org/

Second, the LED RGB driver is based on Andy's patch which moves
led_init_default_state_get() to the global header.
https://lore.kernel.org/all/20220805154907.32263-3-andriy.shevchenko@linux.intel.com/

In addition, we made some changes for MT6370 flash driver (see v12 section
of the change log below).

Thank you,
ChiaEn Wu
---
Change in v12:
- In Patch 5/5 (MT6370 Flash):
	- Rename all 'led_flash_setting *s' --> 'led_flash_setting *setting'
	- Rename 'max_uA' --> 'max_ua' in mt6370_init_flash_properties()


Change in v11:
- In Patch 1/8 (dt-bindings: MT6370 Charger)
	- Add more detailed description of irqs.
	- Adujust the order of irqs


Change in v10:
- In Patch 6/8 (MT6370 Charger):
	- Add a feature (disable input current limit) in
	  'mt6370_chg_init_setting()'
	- Add the header file <linux/devm-helpers.h> for using
	  'devm_work_autocancel()' and 'devm_delayed_work_autocancel()
	- Rename 'pwr_rdy' to 'opposite_pwr_rdy' in
	  'mt6370_chg_pwr_rdy_check()'
	- Rename enum elements
	  ('MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE' -->
	   'MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12')
	- Revise the assignment value of 'val.intval' in
	  'mt6370_chg_pwr_rdy_check()' to make the code easy to read.
	- Revise the initialization of bc12_work (INIT_WORK() -->
	  using devm_work_autocancel()) and mivr_dwork
	  (INIT_DELAYED_WORK + devm_add_action_or_reset() -->
	   devm_delayed_work_autocancel())

- In Patch 8/8 (MT6370 LED Flashlight):
	- Add the revert code when '__mt6370_flash_brightness_set()'
	  return failed.
	- Revise type of 'led_no' (u32 -> u8)
	- Revise type of 'default_state' (u32 -> enum led_default_state)
	- Revise the return value of '_mt6370_flash_brightness_set()'
	- Remove the useless function 'mt6370_init_common_properties()'
	- Use 'led_init_default_state_get()' to init 'led->default_state'


Changes in v9:
- In Patch 05/10:
	- Revise LINEAR_RANGE() and LINEAR_RANGE_IDX()

- In Patch 07/10:
	- Fix wrong 'F_IINLMTSEL' setting in 'mt6370_chg_init_setting()'
	- Revise the usage of LINEAR_RANGE_IDX()

- In Patch 09/10:
	- Revise the format of the comments.

- In Patch 10/10:
	- Revise the format of the comments.


Changes in v8:
- In Patch 06/12:
	- Add linear_range_idx macro for declaring the linear_range
	  struct simply.

- In Patch 09/12:
	- Remove MT6370_CHG_LINEAR_RANGE() macro, and change to use
	  LINEAR_RANGE_IDX() macro

- In Patch 10/12:
	- Add include header file <linux/leds.h>
	- Remove useless 'enum mt6370_state' because of using 'enum led_default_state'
	- Revise the calculation of 'val' in 'mt6370_gen_breath_pattern()'
	- Replace the medthod of getting default-state by using
	  led_init_default_state_get()

- In Patch 11/12:
	- Add missing 'dependency config' in Kconfig
	- Revise all multi-line comments

- In Patch 12/12:
	- Add missing header file <linux/property.h>
	- Remove useledd header file <linux/of_device.h>
	- Revise the comment of 'mt6370_check_vendor_info()'


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 again

- 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 (2):
  dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED
    indicator
  leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator
    support

ChiaEn Wu (1):
  iio: adc: mt6370: Add MediaTek MT6370 support

 .../bindings/leds/mediatek,mt6370-flashlight.yaml  |   41 +
 .../bindings/leds/mediatek,mt6370-indicator.yaml   |   81 ++
 drivers/iio/adc/Kconfig                            |   12 +
 drivers/iio/adc/Makefile                           |    1 +
 drivers/iio/adc/mt6370-adc.c                       |  305 ++++++
 drivers/leds/flash/Kconfig                         |   14 +
 drivers/leds/flash/Makefile                        |    1 +
 drivers/leds/flash/leds-mt6370-flash.c             |  631 ++++++++++++
 drivers/leds/rgb/Kconfig                           |   13 +
 drivers/leds/rgb/Makefile                          |    1 +
 drivers/leds/rgb/leds-mt6370-rgb.c                 | 1010 ++++++++++++++++++++
 11 files changed, 2110 insertions(+)
 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 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

-- 
2.7.4


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[PATCH v12 1/5] 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


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[PATCH v12 2/5] 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


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Re: [PATCH v12 2/5] dt-bindings: leds: Add MediaTek MT6370 flashlight

[Rob Herring]

On Fri, 23 Sep 2022 10:51:23 +0800, ChiaEn Wu wrote:
> 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
> 

Applied patches 1 and 2 as the MFD binding depends on these.

However, these introduce warnings in the example, so please get those 
fixed.

Rob

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[PATCH v12 3/5] 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 support for the MT6370 ADC driver for system monitoring, including
charger current, voltage, and temperature.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 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


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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Jonathan Cameron]

On Fri, 23 Sep 2022 10:51:24 +0800
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 support for the MT6370 ADC driver for system monitoring, including
> charger current, voltage, and temperature.
> 
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>

This will have to either wait for next cycle, or go through mfd because
of the dt-bindings include which is in the mfd tree.

Please make those dependencies clear in new versions.

+CC Lee

Thanks,

Jonathan


> ---
>  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");


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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Lee Jones]

On Sat, 24 Sep 2022, Jonathan Cameron wrote:

> On Fri, 23 Sep 2022 10:51:24 +0800
> 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 support for the MT6370 ADC driver for system monitoring, including
> > charger current, voltage, and temperature.
> > 
> > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> 
> This will have to either wait for next cycle, or go through mfd because
> of the dt-bindings include which is in the mfd tree.
> 
> Please make those dependencies clear in new versions.

If the bindings come together in -next, then subsequently in Mainline,
it shouldn't really matter.  It's only your IIO tree that the DT
tooling with complain about, right?

-- 
Lee Jones [李琼斯]

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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Rob Herring]

On Mon, Sep 26, 2022 at 2:46 AM Lee Jones <lee@kernel.org> wrote:
>
> On Sat, 24 Sep 2022, Jonathan Cameron wrote:
>
> > On Fri, 23 Sep 2022 10:51:24 +0800
> > 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 support for the MT6370 ADC driver for system monitoring, including
> > > charger current, voltage, and temperature.
> > >
> > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> >
> > This will have to either wait for next cycle, or go through mfd because
> > of the dt-bindings include which is in the mfd tree.
> >
> > Please make those dependencies clear in new versions.
>
> If the bindings come together in -next, then subsequently in Mainline,
> it shouldn't really matter.

Except that the bindings haven't come together and at this point may
not for 6.1. linux-next has been warning for weeks because the child
device schemas haven't been applied. I've said it before, all the
schemas for MFD devices need to be applied together. Or at least the
MFD schema needs to get applied last.

Furthermore, subsequent versions of this don't get tested and we end
up with more warnings[1].

It's only your IIO tree that the DT
> tooling with complain about, right?

And the MFD tree...

Please apply the LED bindings (patches 1 and 2) so we can get the
existing warnings fixed and address any new warnings.

Rob

[1] https://lore.kernel.org/all/CAL_Jsq+Zkgfq0q_XgpLEjHLPGSuG06L6y5YbzbiberNMWtAuJw@mail.gmail.com/

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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Lee Jones]

On Mon, 26 Sep 2022, Rob Herring wrote:

> On Mon, Sep 26, 2022 at 2:46 AM Lee Jones <lee@kernel.org> wrote:
> >
> > On Sat, 24 Sep 2022, Jonathan Cameron wrote:
> >
> > > On Fri, 23 Sep 2022 10:51:24 +0800
> > > 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 support for the MT6370 ADC driver for system monitoring, including
> > > > charger current, voltage, and temperature.
> > > >
> > > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > > > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > > > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> > >
> > > This will have to either wait for next cycle, or go through mfd because
> > > of the dt-bindings include which is in the mfd tree.
> > >
> > > Please make those dependencies clear in new versions.
> >
> > If the bindings come together in -next, then subsequently in Mainline,
> > it shouldn't really matter.
> 
> Except that the bindings haven't come together and at this point may
> not for 6.1. linux-next has been warning for weeks because the child
> device schemas haven't been applied. I've said it before, all the
> schemas for MFD devices need to be applied together. Or at least the
> MFD schema needs to get applied last.
> 
> Furthermore, subsequent versions of this don't get tested and we end
> up with more warnings[1].
> 
> It's only your IIO tree that the DT
> > tooling with complain about, right?
> 
> And the MFD tree...
> 
> Please apply the LED bindings (patches 1 and 2) so we can get the
> existing warnings fixed and address any new warnings.

Who usually applies LED bindings?  Looks as though they're good to go.

-- 
Lee Jones [李琼斯]

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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Rob Herring]

On Wed, Sep 28, 2022 at 10:23:42AM +0100, Lee Jones wrote:
> On Mon, 26 Sep 2022, Rob Herring wrote:
> 
> > On Mon, Sep 26, 2022 at 2:46 AM Lee Jones <lee@kernel.org> wrote:
> > >
> > > On Sat, 24 Sep 2022, Jonathan Cameron wrote:
> > >
> > > > On Fri, 23 Sep 2022 10:51:24 +0800
> > > > 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 support for the MT6370 ADC driver for system monitoring, including
> > > > > charger current, voltage, and temperature.
> > > > >
> > > > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > > > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > > > > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > > > > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> > > >
> > > > This will have to either wait for next cycle, or go through mfd because
> > > > of the dt-bindings include which is in the mfd tree.
> > > >
> > > > Please make those dependencies clear in new versions.
> > >
> > > If the bindings come together in -next, then subsequently in Mainline,
> > > it shouldn't really matter.
> > 
> > Except that the bindings haven't come together and at this point may
> > not for 6.1. linux-next has been warning for weeks because the child
> > device schemas haven't been applied. I've said it before, all the
> > schemas for MFD devices need to be applied together. Or at least the
> > MFD schema needs to get applied last.
> > 
> > Furthermore, subsequent versions of this don't get tested and we end
> > up with more warnings[1].
> > 
> > It's only your IIO tree that the DT
> > > tooling with complain about, right?
> > 
> > And the MFD tree...
> > 
> > Please apply the LED bindings (patches 1 and 2) so we can get the
> > existing warnings fixed and address any new warnings.
> 
> Who usually applies LED bindings?  Looks as though they're good to go.

Pavel. The issue would be I don't know if the driver side is ready and 
those usually go together. Other than my complaining here, how's he 
supposed to know that the bindings at least need to be applied?

Again, the process here is not working. I've said before, all the 
bindings for an MFD need to go via 1 tree. You obviously don't agree, so 
propose something. The current process of no coordination doesn't work.

Rob

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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Lee Jones]

On Thu, 29 Sep 2022, Rob Herring wrote:

> On Wed, Sep 28, 2022 at 10:23:42AM +0100, Lee Jones wrote:
> > On Mon, 26 Sep 2022, Rob Herring wrote:
> > 
> > > On Mon, Sep 26, 2022 at 2:46 AM Lee Jones <lee@kernel.org> wrote:
> > > >
> > > > On Sat, 24 Sep 2022, Jonathan Cameron wrote:
> > > >
> > > > > On Fri, 23 Sep 2022 10:51:24 +0800
> > > > > 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 support for the MT6370 ADC driver for system monitoring, including
> > > > > > charger current, voltage, and temperature.
> > > > > >
> > > > > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > > > > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > > > > > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > > > > > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
> > > > >
> > > > > This will have to either wait for next cycle, or go through mfd because
> > > > > of the dt-bindings include which is in the mfd tree.
> > > > >
> > > > > Please make those dependencies clear in new versions.
> > > >
> > > > If the bindings come together in -next, then subsequently in Mainline,
> > > > it shouldn't really matter.
> > > 
> > > Except that the bindings haven't come together and at this point may
> > > not for 6.1. linux-next has been warning for weeks because the child
> > > device schemas haven't been applied. I've said it before, all the
> > > schemas for MFD devices need to be applied together. Or at least the
> > > MFD schema needs to get applied last.
> > > 
> > > Furthermore, subsequent versions of this don't get tested and we end
> > > up with more warnings[1].
> > > 
> > > It's only your IIO tree that the DT
> > > > tooling with complain about, right?
> > > 
> > > And the MFD tree...
> > > 
> > > Please apply the LED bindings (patches 1 and 2) so we can get the
> > > existing warnings fixed and address any new warnings.
> > 
> > Who usually applies LED bindings?  Looks as though they're good to go.
> 
> Pavel. The issue would be I don't know if the driver side is ready and 
> those usually go together. Other than my complaining here, how's he 
> supposed to know that the bindings at least need to be applied?
> 
> Again, the process here is not working. I've said before, all the 
> bindings for an MFD need to go via 1 tree. You obviously don't agree, so 
> propose something. The current process of no coordination doesn't work.

The solution would be for someone to create succinct immutable branches, like
I do for real code.  If someone would be happy to do that, I'd be more than
happy to pull from them.

I go to the effort of creating them to prevent actual build breakages,
however doing so to keep a documentation helper script happy is a step
too far for me personally, sorry.

-- 
Lee Jones [李琼斯]

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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Jonathan Cameron]

On Thu, 29 Sep 2022 18:51:32 +0100
Lee Jones <lee@kernel.org> wrote:

> On Thu, 29 Sep 2022, Rob Herring wrote:
> 
> > On Wed, Sep 28, 2022 at 10:23:42AM +0100, Lee Jones wrote:  
> > > On Mon, 26 Sep 2022, Rob Herring wrote:
> > >   
> > > > On Mon, Sep 26, 2022 at 2:46 AM Lee Jones <lee@kernel.org> wrote:  
> > > > >
> > > > > On Sat, 24 Sep 2022, Jonathan Cameron wrote:
> > > > >  
> > > > > > On Fri, 23 Sep 2022 10:51:24 +0800
> > > > > > 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 support for the MT6370 ADC driver for system monitoring, including
> > > > > > > charger current, voltage, and temperature.
> > > > > > >
> > > > > > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > > > > > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > > > > > > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > > > > > > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>  
> > > > > >
> > > > > > This will have to either wait for next cycle, or go through mfd because
> > > > > > of the dt-bindings include which is in the mfd tree.
> > > > > >
> > > > > > Please make those dependencies clear in new versions.  
> > > > >
> > > > > If the bindings come together in -next, then subsequently in Mainline,
> > > > > it shouldn't really matter.  
> > > > 
> > > > Except that the bindings haven't come together and at this point may
> > > > not for 6.1. linux-next has been warning for weeks because the child
> > > > device schemas haven't been applied. I've said it before, all the
> > > > schemas for MFD devices need to be applied together. Or at least the
> > > > MFD schema needs to get applied last.
> > > > 
> > > > Furthermore, subsequent versions of this don't get tested and we end
> > > > up with more warnings[1].
> > > > 
> > > > It's only your IIO tree that the DT  
> > > > > tooling with complain about, right?  
> > > > 
> > > > And the MFD tree...
> > > > 
> > > > Please apply the LED bindings (patches 1 and 2) so we can get the
> > > > existing warnings fixed and address any new warnings.  
> > > 
> > > Who usually applies LED bindings?  Looks as though they're good to go.  
> > 
> > Pavel. The issue would be I don't know if the driver side is ready and 
> > those usually go together. Other than my complaining here, how's he 
> > supposed to know that the bindings at least need to be applied?
> > 
> > Again, the process here is not working. I've said before, all the 
> > bindings for an MFD need to go via 1 tree. You obviously don't agree, so 
> > propose something. The current process of no coordination doesn't work.  
> 
> The solution would be for someone to create succinct immutable branches, like
> I do for real code.  If someone would be happy to do that, I'd be more than
> happy to pull from them.
> 
> I go to the effort of creating them to prevent actual build breakages,
> however doing so to keep a documentation helper script happy is a step
> too far for me personally, sorry.
> 

In this case the bindings include is included from the driver - not just the
binding.  Obviously there are dances to get around that by using the values
and replacing in following cycle, but that's not the case here!

Jonathan


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Re: [PATCH v12 3/5] iio: adc: mt6370: Add MediaTek MT6370 support

[Lee Jones]

On Sat, 01 Oct 2022, Jonathan Cameron wrote:

> On Thu, 29 Sep 2022 18:51:32 +0100
> Lee Jones <lee@kernel.org> wrote:
> 
> > On Thu, 29 Sep 2022, Rob Herring wrote:
> > 
> > > On Wed, Sep 28, 2022 at 10:23:42AM +0100, Lee Jones wrote:  
> > > > On Mon, 26 Sep 2022, Rob Herring wrote:
> > > >   
> > > > > On Mon, Sep 26, 2022 at 2:46 AM Lee Jones <lee@kernel.org> wrote:  
> > > > > >
> > > > > > On Sat, 24 Sep 2022, Jonathan Cameron wrote:
> > > > > >  
> > > > > > > On Fri, 23 Sep 2022 10:51:24 +0800
> > > > > > > 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 support for the MT6370 ADC driver for system monitoring, including
> > > > > > > > charger current, voltage, and temperature.
> > > > > > > >
> > > > > > > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > > > > > > > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> > > > > > > > Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > > > > > > > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>  
> > > > > > >
> > > > > > > This will have to either wait for next cycle, or go through mfd because
> > > > > > > of the dt-bindings include which is in the mfd tree.
> > > > > > >
> > > > > > > Please make those dependencies clear in new versions.  
> > > > > >
> > > > > > If the bindings come together in -next, then subsequently in Mainline,
> > > > > > it shouldn't really matter.  
> > > > > 
> > > > > Except that the bindings haven't come together and at this point may
> > > > > not for 6.1. linux-next has been warning for weeks because the child
> > > > > device schemas haven't been applied. I've said it before, all the
> > > > > schemas for MFD devices need to be applied together. Or at least the
> > > > > MFD schema needs to get applied last.
> > > > > 
> > > > > Furthermore, subsequent versions of this don't get tested and we end
> > > > > up with more warnings[1].
> > > > > 
> > > > > It's only your IIO tree that the DT  
> > > > > > tooling with complain about, right?  
> > > > > 
> > > > > And the MFD tree...
> > > > > 
> > > > > Please apply the LED bindings (patches 1 and 2) so we can get the
> > > > > existing warnings fixed and address any new warnings.  
> > > > 
> > > > Who usually applies LED bindings?  Looks as though they're good to go.  
> > > 
> > > Pavel. The issue would be I don't know if the driver side is ready and 
> > > those usually go together. Other than my complaining here, how's he 
> > > supposed to know that the bindings at least need to be applied?
> > > 
> > > Again, the process here is not working. I've said before, all the 
> > > bindings for an MFD need to go via 1 tree. You obviously don't agree, so 
> > > propose something. The current process of no coordination doesn't work.  
> > 
> > The solution would be for someone to create succinct immutable branches, like
> > I do for real code.  If someone would be happy to do that, I'd be more than
> > happy to pull from them.
> > 
> > I go to the effort of creating them to prevent actual build breakages,
> > however doing so to keep a documentation helper script happy is a step
> > too far for me personally, sorry.
> > 
> 
> In this case the bindings include is included from the driver - not just the
> binding.  Obviously there are dances to get around that by using the values
> and replacing in following cycle, but that's not the case here!

The paragraphs above to not pertain to the use of shared include
files.  Obviously that would be a good case for the use of IBs.

-- 
Lee Jones [李琼斯]

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[PATCH v12 4/5] 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 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>
---
 drivers/leds/rgb/Kconfig           |   13 +
 drivers/leds/rgb/Makefile          |    1 +
 drivers/leds/rgb/leds-mt6370-rgb.c | 1010 ++++++++++++++++++++++++++++++++++++
 3 files changed, 1024 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..1f9d648
--- /dev/null
+++ b/drivers/leds/rgb/leds-mt6370-rgb.c
@@ -0,0 +1,1010 @@
+// 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/leds.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
+};
+
+#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;
+	enum led_default_state 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);
+
+		if (i % 2) {
+			val |= sel;
+		} else {
+			val <<= 8;
+			val |= sel << 4;
+		}
+	}
+
+	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;
+	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);
+
+	led->default_state = led_init_default_state_get(init_data->fwnode);
+
+	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 LEDS_DEFSTATE_ON:
+		led->isink.brightness = led->isink.max_brightness;
+		break;
+	case LEDS_DEFSTATE_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


_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v12 5/5] 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 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>
---

v12
- Rename all 'led_flash_setting *s' --> 'led_flash_setting *setting'
- Rename 'max_uA' --> 'max_ua' in mt6370_init_flash_properties()
---
 drivers/leds/flash/Kconfig             |  14 +
 drivers/leds/flash/Makefile            |   1 +
 drivers/leds/flash/leds-mt6370-flash.c | 631 +++++++++++++++++++++++++++++++++
 3 files changed, 646 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..405bd16 100644
--- a/drivers/leds/flash/Kconfig
+++ b/drivers/leds/flash/Kconfig
@@ -61,6 +61,20 @@ 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 && OF
+	depends on LEDS_CLASS_FLASH || !LEDS_CLASS_FLASH
+	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_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..bd4bfb9
--- /dev/null
+++ b/drivers/leds/flash/leds-mt6370-flash.c
@@ -0,0 +1,631 @@
+// 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;
+	enum led_default_state default_state;
+	u8 led_no;
+};
+
+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);
+
+	/*
+	 * There is only one set of flash control logic, and this
+	 * flag is used to check if 'strobe' is currently being 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) {
+			u32 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)
+{
+	/*
+	 * Because of the current spikes when turning on the flash,
+	 * the brightness should be kept by the LED framework. This
+	 * empty function is used to prevent checking failure when
+	 * led_classdev_flash registers ops.
+	 */
+	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 *setting = &fl_cdev->brightness;
+	u32 val = (brightness - setting->min) / setting->step;
+	int ret, i;
+
+	if (led->led_no == MT6370_LED_JOINT) {
+		u32 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)
+				break;
+		}
+
+		return ret;
+	} else {
+		return regmap_update_bits(priv->regmap,
+					  MT6370_REG_FLEDISTRB(led->led_no),
+					  MT6370_ISTROBE_MASK, val);
+	}
+}
+
+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 *setting = &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);
+
+	/*
+	 * There is only one set of flash control logic, and this
+	 * flag is used to check if 'torch' is currently being 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 turn on, configure the flash current to
+	 * ramp up to the setting value. Otherwise, always revert to the
+	 * minimum one.
+	 */
+	ret = _mt6370_flash_brightness_set(fl_cdev, state ? setting->val : setting->min);
+	if (ret) {
+		dev_err(lcdev->dev, "[%d] Failed to set brightness\n", led->led_no);
+		goto out_revert_state;
+	}
+
+	/*
+	 * For the flash to turn on/off, we must wait for 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;
+
+out_revert_state:
+	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] revert current source fail\n", led->led_no);
+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 *setting = &fl_cdev->timeout;
+	u32 val = (timeout - setting->min) / setting->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 *setting = &config->intensity;
+
+	lcdev = &led->flash.led_cdev;
+
+	setting->min = MT6370_ITORCH_MIN_uA;
+	setting->step = MT6370_ITORCH_STEP_uA;
+	setting->max = setting->min + (lcdev->max_brightness - 1) * setting->step;
+	setting->val = setting->max;
+
+	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 *setting;
+	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);
+	}
+
+	setting = &flash->brightness;
+	setting->min = MT6370_ISTRB_MIN_uA;
+	setting->step = MT6370_ISTRB_STEP_uA;
+	setting->val = setting->max = val;
+
+	/*
+	 * Always configure to the minimum level when
+	 * off to prevent flash current spikes.
+	 */
+	ret = _mt6370_flash_brightness_set(flash, setting->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);
+	}
+
+	setting = &flash->timeout;
+	setting->min = MT6370_STRBTO_MIN_US;
+	setting->step = MT6370_STRBTO_STEP_US;
+	setting->val = setting->max = val;
+
+	flash->ops = &mt6370_flash_ops;
+
+	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;
+		led->default_state = led_init_default_state_get(init_data.fwnode);
+
+		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


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