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* [PATCH v15 0/7] support ROHM BD70528 PMIC
@ 2019-06-03  7:23 Matti Vaittinen
  2019-06-03  7:24 ` [PATCH v15 1/7] mfd: regulator: clk: split rohm-bd718x7.h Matti Vaittinen
                   ` (8 more replies)
  0 siblings, 9 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:23 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

Patch series introducing support for ROHM BD70528 PMIC

ROHM BD70528 is a programmable Power Management IC for battery
powered 'ultra low power' systems like the pre-announced NXP
i.MX7 ULP. This patch series introduces support for the PMIC. Please
note that this driver only supports HW setup where PMIC is connected
to I2C on A7 core. The other scenario is to use M4 as a power manager
and connect pmic to M4. On such setups the A7 can only access pmic
via M4 core using RPMSG virtio. Such setup depends on RPMSG
implementation on M4 core and is currently not supported by this
patch series.

RTC block of the bd70528 can support 'wake' irq which wakes PMIC
from standby state. Wake irq's can be armed to wake up system up
to 24 hours from arming. bd70528 can also generate alarm interrupts
which can be armed to occur years after triggering. The RTC driver
does always arm both the waker and alarm irqs and does not utilize
longer period of alarm interrupts. All the RTC timers are limited
to occur within the next 24 hours. Any suggestions on more elegant
timer support are welcome =)

GPIO portion of bd70528 driver adds I/O support for driving GPIO
pins or reading the state. The interrupt functionality is provided
by regmap-irq. Current GPIO driver is not aware of whether the pin(s)
are used for I/O or interrupts and it is up-to driver user to
ensure there is no misconfiguration or "double use".

The power-supply patch included in series is only poorly tested as I
lack of hardware with real battery connected. Reset and ADC are not
supported by this series.

Changelog v15:
- Only charger driver changed and WDT dropped from series (already
  merged to Linux 5.2)
- Staticitzed constant array in power-supply driver as suggested by
  Sebastian Reichel
- rebased to linux 5.2-rc3

Changelog v14: Changes proposed by Sebastian Reichel
- Only charger driver changed
- Constifying/staticizing structs
- Use dev_get_regmap() instead of providing regmap pointer in parent's
  driver data
- Power type MAINS instead of BATTERY

Changelog v13:
- Moved WDT enable/disable code from MFD to WDT
- Added WDT enable/disable stubs for cases where WDT is omitted from
  Kconfig

Changelog v12:
- No functional changes
- Fixed styling issues pointed by Lee Jones
- Fixed styling issues pointed by Alexandre Belloni
- Fixed various styling issues

Changelog v11:
- No functional changes
- Rebased on linux 5.1-rc2
- Dropped patch 9 which was already applied by Mark
- renamed dt-bindings patch as suggested by Rob
  
Changelog v10:
- Exported locking functions for RTC lock and as a result dropped hid
  the struct bd70528 from sub-devices who no longer needed it.
- removed linux/gpio.h header from GPIO driver.

Changelog v9: Changes suggested by Lee Jones
- MFD, DT-binding, RTC and WDT changed
- DT-bindings: Spelling fixes
- RTC and WDT: Use exported function instead of function pointer for WDT
  arming/disarming
- MFD: Export WDT arming/disarming function instead of providing a
  pointer to it.
- Various styling fixes.

Changelog v8:
- regulators(*), wdt, gpio, rtc, mfd(*) and dt-bindings unchanged.
  (*)Patches 1-3 squashed to not break bisecting.

- removed unnecessary newline from clk
- fixed possible use of uninitialized 'reg' from power-supply.
  Found by 0-day tests and reported by Dan Carpenter.

Changelog v7:
Only patch 2 changed.
- Avoid out-of-array-bounds access at regulator probe if unsupported
  chip type is passed to bd718x7 regulator driver.

Changelog v6:
Only patch 10 changed.
- styling fixes pointed by Gunter Roeck
- dropped RFC tag

Changelog v5 (RFC):
Only patch 7 changed.
- Explained why lock is not needed at GPIO value getting
- removed ampersands from function pointer assignments.

Changelog v4 (RFC):
patches 1,2,3,4,5,10 are unchanged from v3
DT-binding fixes suggested by Rob Herring:
- drop interrupt-parent
- drop clock-frequency
- change pmic node name to a generic one
RTC:
- enable RTC block's irqs before registering rtc
GPIO fixes after initial testing:
- fix getting GPIO value when direction is output
POWER:
- Add ASCII art intended to clarify the charger HW state machine

Changelog v3 (RFC):
patches 1,2,3,4,5,6,7,8 and 10 are unchanged from v2
RTC fixups suggested by Guenter Roeck:
- create bd70528_set_time_locked function in order to simplify
  error handling and to make mutex lock/unlock path more obvious
- don't ignore errors on bd70528_set_time_locked
- simplify bd70528_read_alarm enabled condition setting
- add __packed to structs where members are mapped to HW registers
- remove unnecessary brackets from enable condition in set_wake
RTC: fixups suggested by Alessandro Belloni
- don't use deprecated devm_rtc_device_register
- add alarm_irq_enable callback
- add range_min and range_max
WDT:
- add regmap and mutex pointers to WDT data so that they can be accessed
  without dereferencing the parent data
- remove parent data pointer from WDT data
- embed struct watchdog_device into WDT data in order to avoid double
  allocation.
GPIO:
- remove unused header as pointed by Linus Walleij
POWER:
- do not copy the whole MFD data (especially the mutex to avoid
  all possibilities of accidentally using the copy of a mutex)

Changelog v2 (RFC): Mainly feedback from Guenter Roeck:
- patches 1, 2, 3, 4, 5, 9 are unchanged.
- mfd: own mutex for each bd70528 instance - embed in struct bd70528
- watchdog: do not copy parent device data
- watchdog: fix deadlock caused by double locked mutex
- watchdog: set initial timeouts and WDT parent information
- watchdog: remove unnecessary ping function from ops
- watchdog: and the comment regarding it
- watchdog: allocate watchdog struct in order to allow multiple WDG
  instances
- rtc: bd70528 fix the order of mutex unlock and re-enabling RTC based
  timers
- rtc: fix the irq mask register address
- power: fix the irq mask register address
- regulator/regmap-irq: Drop the patches 1, 8 and 9 from original series
  as those were already applied by Mark 

Patch 1:
	split the bd718x7.h to generic and chip specific portions.
	(breaks compilation without patch 2 and 3)
	- adapt bd718x7.h changes to bd718x7 regulator driver
	- adapt bd718x7.h changes to bd718x7 clk driver
Patch 2:
	add MFD core support for bd70528
Patch 3:
	support bd70528 clk using bd718x7 clk driver
Patch 4:
	document DT bindings for BD70528
Patch 5:
	support BD70528 GPIO block
Patch 6:
	support BD70528 RTC
Patch 7:
	support BD70528 battery charger

This patch series is based on Linus' v5.2-rc3 tag.

---

Matti Vaittinen (7):
  mfd: regulator: clk: split rohm-bd718x7.h
  mfd: bd70528: Support ROHM bd70528 PMIC - core
  clk: bd718x7: Support ROHM BD70528 clk block
  dt-bindings: mfd: Document first ROHM BD70528 bindings
  gpio: Initial support for ROHM bd70528 GPIO block
  rtc: bd70528: Initial support for ROHM bd70528 RTC
  power: supply: Initial support for ROHM BD70528 PMIC charger block

 .../bindings/mfd/rohm,bd70528-pmic.txt        | 102 +++
 drivers/clk/Kconfig                           |   6 +-
 drivers/clk/clk-bd718x7.c                     |  24 +-
 drivers/gpio/Kconfig                          |  11 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-bd70528.c                   | 232 ++++++
 drivers/mfd/Kconfig                           |  17 +
 drivers/mfd/Makefile                          |   2 +
 drivers/mfd/rohm-bd70528.c                    | 316 ++++++++
 drivers/mfd/rohm-bd718x7.c                    |  23 +-
 drivers/power/supply/Kconfig                  |   9 +
 drivers/power/supply/Makefile                 |   1 +
 drivers/power/supply/bd70528-charger.c        | 743 ++++++++++++++++++
 drivers/regulator/bd718x7-regulator.c         |  25 +-
 drivers/rtc/Kconfig                           |   8 +
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-bd70528.c                     | 500 ++++++++++++
 include/linux/mfd/rohm-bd70528.h              | 408 ++++++++++
 include/linux/mfd/rohm-bd718x7.h              |  22 +-
 include/linux/mfd/rohm-generic.h              |  20 +
 20 files changed, 2425 insertions(+), 46 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt
 create mode 100644 drivers/gpio/gpio-bd70528.c
 create mode 100644 drivers/mfd/rohm-bd70528.c
 create mode 100644 drivers/power/supply/bd70528-charger.c
 create mode 100644 drivers/rtc/rtc-bd70528.c
 create mode 100644 include/linux/mfd/rohm-bd70528.h
 create mode 100644 include/linux/mfd/rohm-generic.h

-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 1/7] mfd: regulator: clk: split rohm-bd718x7.h
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
@ 2019-06-03  7:24 ` Matti Vaittinen
  2019-06-03  7:25 ` [PATCH v15 2/7] mfd: bd70528: Support ROHM bd70528 PMIC - core Matti Vaittinen
                   ` (7 subsequent siblings)
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:24 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

Split the bd718x7.h to ROHM common and bd718x7 specific parts
so that we do not need to add same things in every new ROHM
PMIC header. Please note that this change requires changes also
in bd718x7 sub-device drivers for regulators and clk.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
---
Unchanged from v14

 drivers/clk/clk-bd718x7.c             |  6 +++---
 drivers/mfd/rohm-bd718x7.c            | 23 ++++++++++++-----------
 drivers/regulator/bd718x7-regulator.c | 25 +++++++++++++------------
 include/linux/mfd/rohm-bd718x7.h      | 22 ++++++++--------------
 include/linux/mfd/rohm-generic.h      | 20 ++++++++++++++++++++
 5 files changed, 56 insertions(+), 40 deletions(-)
 create mode 100644 include/linux/mfd/rohm-generic.h

diff --git a/drivers/clk/clk-bd718x7.c b/drivers/clk/clk-bd718x7.c
index 60422c72d142..461228ebf703 100644
--- a/drivers/clk/clk-bd718x7.c
+++ b/drivers/clk/clk-bd718x7.c
@@ -17,7 +17,7 @@ struct bd718xx_clk {
 	u8 reg;
 	u8 mask;
 	struct platform_device *pdev;
-	struct bd718xx *mfd;
+	struct rohm_regmap_dev *mfd;
 };
 
 static int bd71837_clk_set(struct clk_hw *hw, int status)
@@ -68,7 +68,7 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 	int rval = -ENOMEM;
 	const char *parent_clk;
 	struct device *parent = pdev->dev.parent;
-	struct bd718xx *mfd = dev_get_drvdata(parent);
+	struct rohm_regmap_dev *mfd = dev_get_drvdata(parent);
 	struct clk_init_data init = {
 		.name = "bd718xx-32k-out",
 		.ops = &bd71837_clk_ops,
@@ -119,5 +119,5 @@ static struct platform_driver bd71837_clk = {
 module_platform_driver(bd71837_clk);
 
 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
-MODULE_DESCRIPTION("BD71837 chip clk driver");
+MODULE_DESCRIPTION("BD71837/BD71847 chip clk driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/rohm-bd718x7.c b/drivers/mfd/rohm-bd718x7.c
index a29d529a96f4..7beb444a57cb 100644
--- a/drivers/mfd/rohm-bd718x7.c
+++ b/drivers/mfd/rohm-bd718x7.c
@@ -98,18 +98,19 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c,
 		return -ENOMEM;
 
 	bd718xx->chip_irq = i2c->irq;
-	bd718xx->chip_type = (unsigned int)(uintptr_t)
+	bd718xx->chip.chip_type = (unsigned int)(uintptr_t)
 				of_device_get_match_data(&i2c->dev);
-	bd718xx->dev = &i2c->dev;
+	bd718xx->chip.dev = &i2c->dev;
 	dev_set_drvdata(&i2c->dev, bd718xx);
 
-	bd718xx->regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config);
-	if (IS_ERR(bd718xx->regmap)) {
+	bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
+						    &bd718xx_regmap_config);
+	if (IS_ERR(bd718xx->chip.regmap)) {
 		dev_err(&i2c->dev, "regmap initialization failed\n");
-		return PTR_ERR(bd718xx->regmap);
+		return PTR_ERR(bd718xx->chip.regmap);
 	}
 
-	ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->regmap,
+	ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
 				       bd718xx->chip_irq, IRQF_ONESHOT, 0,
 				       &bd718xx_irq_chip, &bd718xx->irq_data);
 	if (ret) {
@@ -118,7 +119,7 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c,
 	}
 
 	/* Configure short press to 10 milliseconds */
-	ret = regmap_update_bits(bd718xx->regmap,
+	ret = regmap_update_bits(bd718xx->chip.regmap,
 				 BD718XX_REG_PWRONCONFIG0,
 				 BD718XX_PWRBTN_PRESS_DURATION_MASK,
 				 BD718XX_PWRBTN_SHORT_PRESS_10MS);
@@ -129,7 +130,7 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c,
 	}
 
 	/* Configure long press to 10 seconds */
-	ret = regmap_update_bits(bd718xx->regmap,
+	ret = regmap_update_bits(bd718xx->chip.regmap,
 				 BD718XX_REG_PWRONCONFIG1,
 				 BD718XX_PWRBTN_PRESS_DURATION_MASK,
 				 BD718XX_PWRBTN_LONG_PRESS_10S);
@@ -149,7 +150,7 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c,
 
 	button.irq = ret;
 
-	ret = devm_mfd_add_devices(bd718xx->dev, PLATFORM_DEVID_AUTO,
+	ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
 				   bd718xx_mfd_cells,
 				   ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0,
 				   regmap_irq_get_domain(bd718xx->irq_data));
@@ -162,11 +163,11 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c,
 static const struct of_device_id bd718xx_of_match[] = {
 	{
 		.compatible = "rohm,bd71837",
-		.data = (void *)BD718XX_TYPE_BD71837,
+		.data = (void *)ROHM_CHIP_TYPE_BD71837,
 	},
 	{
 		.compatible = "rohm,bd71847",
-		.data = (void *)BD718XX_TYPE_BD71847,
+		.data = (void *)ROHM_CHIP_TYPE_BD71847,
 	},
 	{ }
 };
diff --git a/drivers/regulator/bd718x7-regulator.c b/drivers/regulator/bd718x7-regulator.c
index fde4264da6ff..ef2fc175a9ae 100644
--- a/drivers/regulator/bd718x7-regulator.c
+++ b/drivers/regulator/bd718x7-regulator.c
@@ -1152,12 +1152,12 @@ static int bd718xx_probe(struct platform_device *pdev)
 {
 	struct bd718xx *mfd;
 	struct regulator_config config = { 0 };
-	struct bd718xx_pmic_inits pmic_regulators[] = {
-		[BD718XX_TYPE_BD71837] = {
+	struct bd718xx_pmic_inits pmic_regulators[ROHM_CHIP_TYPE_AMOUNT] = {
+		[ROHM_CHIP_TYPE_BD71837] = {
 			.r_datas = bd71837_regulators,
 			.r_amount = ARRAY_SIZE(bd71837_regulators),
 		},
-		[BD718XX_TYPE_BD71847] = {
+		[ROHM_CHIP_TYPE_BD71847] = {
 			.r_datas = bd71847_regulators,
 			.r_amount = ARRAY_SIZE(bd71847_regulators),
 		},
@@ -1173,15 +1173,15 @@ static int bd718xx_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	if (mfd->chip_type >= BD718XX_TYPE_AMOUNT ||
-	    !pmic_regulators[mfd->chip_type].r_datas) {
+	if (mfd->chip.chip_type >= ROHM_CHIP_TYPE_AMOUNT ||
+	    !pmic_regulators[mfd->chip.chip_type].r_datas) {
 		dev_err(&pdev->dev, "Unsupported chip type\n");
 		err = -EINVAL;
 		goto err;
 	}
 
 	/* Register LOCK release */
-	err = regmap_update_bits(mfd->regmap, BD718XX_REG_REGLOCK,
+	err = regmap_update_bits(mfd->chip.regmap, BD718XX_REG_REGLOCK,
 				 (REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to unlock PMIC (%d)\n", err);
@@ -1200,7 +1200,8 @@ static int bd718xx_probe(struct platform_device *pdev)
 	 * bit allowing HW defaults for power rails to be used
 	 */
 	if (!use_snvs) {
-		err = regmap_update_bits(mfd->regmap, BD718XX_REG_TRANS_COND1,
+		err = regmap_update_bits(mfd->chip.regmap,
+					 BD718XX_REG_TRANS_COND1,
 					 BD718XX_ON_REQ_POWEROFF_MASK |
 					 BD718XX_SWRESET_POWEROFF_MASK |
 					 BD718XX_WDOG_POWEROFF_MASK |
@@ -1215,17 +1216,17 @@ static int bd718xx_probe(struct platform_device *pdev)
 		}
 	}
 
-	for (i = 0; i < pmic_regulators[mfd->chip_type].r_amount; i++) {
+	for (i = 0; i < pmic_regulators[mfd->chip.chip_type].r_amount; i++) {
 
 		const struct regulator_desc *desc;
 		struct regulator_dev *rdev;
 		const struct bd718xx_regulator_data *r;
 
-		r = &pmic_regulators[mfd->chip_type].r_datas[i];
+		r = &pmic_regulators[mfd->chip.chip_type].r_datas[i];
 		desc = &r->desc;
 
 		config.dev = pdev->dev.parent;
-		config.regmap = mfd->regmap;
+		config.regmap = mfd->chip.regmap;
 
 		rdev = devm_regulator_register(&pdev->dev, desc, &config);
 		if (IS_ERR(rdev)) {
@@ -1254,7 +1255,7 @@ static int bd718xx_probe(struct platform_device *pdev)
 		 */
 		if (!use_snvs || !rdev->constraints->always_on ||
 		    !rdev->constraints->boot_on) {
-			err = regmap_update_bits(mfd->regmap, r->init.reg,
+			err = regmap_update_bits(mfd->chip.regmap, r->init.reg,
 						 r->init.mask, r->init.val);
 			if (err) {
 				dev_err(&pdev->dev,
@@ -1264,7 +1265,7 @@ static int bd718xx_probe(struct platform_device *pdev)
 			}
 		}
 		for (j = 0; j < r->additional_init_amnt; j++) {
-			err = regmap_update_bits(mfd->regmap,
+			err = regmap_update_bits(mfd->chip.regmap,
 						 r->additional_inits[j].reg,
 						 r->additional_inits[j].mask,
 						 r->additional_inits[j].val);
diff --git a/include/linux/mfd/rohm-bd718x7.h b/include/linux/mfd/rohm-bd718x7.h
index fd194bfc836f..7f2dbde402a1 100644
--- a/include/linux/mfd/rohm-bd718x7.h
+++ b/include/linux/mfd/rohm-bd718x7.h
@@ -4,14 +4,9 @@
 #ifndef __LINUX_MFD_BD718XX_H__
 #define __LINUX_MFD_BD718XX_H__
 
+#include <linux/mfd/rohm-generic.h>
 #include <linux/regmap.h>
 
-enum {
-	BD718XX_TYPE_BD71837 = 0,
-	BD718XX_TYPE_BD71847,
-	BD718XX_TYPE_AMOUNT
-};
-
 enum {
 	BD718XX_BUCK1 = 0,
 	BD718XX_BUCK2,
@@ -321,18 +316,17 @@ enum {
 	BD718XX_PWRBTN_LONG_PRESS_15S
 };
 
-struct bd718xx_clk;
-
 struct bd718xx {
-	unsigned int chip_type;
-	struct device *dev;
-	struct regmap *regmap;
-	unsigned long int id;
+	/*
+	 * Please keep this as the first member here as some
+	 * drivers (clk) supporting more than one chip may only know this
+	 * generic struct 'struct rohm_regmap_dev' and assume it is
+	 * the first chunk of parent device's private data.
+	 */
+	struct rohm_regmap_dev chip;
 
 	int chip_irq;
 	struct regmap_irq_chip_data *irq_data;
-
-	struct bd718xx_clk *clk;
 };
 
 #endif /* __LINUX_MFD_BD718XX_H__ */
diff --git a/include/linux/mfd/rohm-generic.h b/include/linux/mfd/rohm-generic.h
new file mode 100644
index 000000000000..bff15ac26f2c
--- /dev/null
+++ b/include/linux/mfd/rohm-generic.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2018 ROHM Semiconductors */
+
+#ifndef __LINUX_MFD_ROHM_H__
+#define __LINUX_MFD_ROHM_H__
+
+enum {
+	ROHM_CHIP_TYPE_BD71837 = 0,
+	ROHM_CHIP_TYPE_BD71847,
+	ROHM_CHIP_TYPE_BD70528,
+	ROHM_CHIP_TYPE_AMOUNT
+};
+
+struct rohm_regmap_dev {
+	unsigned int chip_type;
+	struct device *dev;
+	struct regmap *regmap;
+};
+
+#endif
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 2/7] mfd: bd70528: Support ROHM bd70528 PMIC - core
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
  2019-06-03  7:24 ` [PATCH v15 1/7] mfd: regulator: clk: split rohm-bd718x7.h Matti Vaittinen
@ 2019-06-03  7:25 ` Matti Vaittinen
  2019-06-03  7:25 ` [PATCH v15 3/7] clk: bd718x7: Support ROHM BD70528 clk block Matti Vaittinen
                   ` (6 subsequent siblings)
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:25 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

ROHM BD70528MWV is an ultra-low quiescent current general
purpose single-chip power management IC for battery-powered
portable devices.

Add MFD core which enables chip access for following subdevices:
	- regulators/LED drivers
	- battery-charger
	- gpios
	- 32.768kHz clk
	- RTC
	- watchdog

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
---
Unchanged from v14

 drivers/mfd/Kconfig              |  17 ++
 drivers/mfd/Makefile             |   2 +
 drivers/mfd/rohm-bd70528.c       | 316 ++++++++++++++++++++++++
 include/linux/mfd/rohm-bd70528.h | 408 +++++++++++++++++++++++++++++++
 4 files changed, 743 insertions(+)
 create mode 100644 drivers/mfd/rohm-bd70528.c
 create mode 100644 include/linux/mfd/rohm-bd70528.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index a17d275bf1d4..024c644940f0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1891,6 +1891,23 @@ config MFD_ROHM_BD718XX
 	  NXP i.MX8. It contains 8 BUCK outputs and 7 LDOs, voltage monitoring
 	  and emergency shut down as well as 32,768KHz clock output.
 
+config MFD_ROHM_BD70528
+	tristate "ROHM BD70528 Power Management IC"
+	depends on I2C=y
+	depends on OF
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select MFD_CORE
+	help
+	  Select this option to get support for the ROHM BD70528 Power
+	  Management IC. BD71837 is general purpose single-chip power
+	  management IC for battery-powered portable devices. It contains
+	  3 ultra-low current consumption buck converters, 3 LDOs and 2 LED
+	  drivers. Also included are 4 GPIOs, a real-time clock (RTC), a 32kHz
+	  crystal oscillator, high-accuracy VREF for use with an external ADC,
+	  10 bits SAR ADC for battery temperature monitor and 1S battery
+	  charger.
+
 config MFD_STM32_LPTIMER
 	tristate "Support for STM32 Low-Power Timer"
 	depends on (ARCH_STM32 && OF) || COMPILE_TEST
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 52b1a90ff515..643d65bcb6ea 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -247,5 +247,7 @@ obj-$(CONFIG_MFD_STM32_TIMERS) 	+= stm32-timers.o
 obj-$(CONFIG_MFD_MXS_LRADC)     += mxs-lradc.o
 obj-$(CONFIG_MFD_SC27XX_PMIC)	+= sprd-sc27xx-spi.o
 obj-$(CONFIG_RAVE_SP_CORE)	+= rave-sp.o
+obj-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o
+
diff --git a/drivers/mfd/rohm-bd70528.c b/drivers/mfd/rohm-bd70528.c
new file mode 100644
index 000000000000..55599d5c5c86
--- /dev/null
+++ b/drivers/mfd/rohm-bd70528.c
@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// Copyright (C) 2019 ROHM Semiconductors
+//
+// ROHM BD70528 PMIC driver
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/rohm-bd70528.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#define BD70528_NUM_OF_GPIOS 4
+
+static const struct resource rtc_irqs[] = {
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_RTC_ALARM, "bd70528-rtc-alm"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_ELPS_TIM, "bd70528-elapsed-timer"),
+};
+
+static const struct resource charger_irqs[] = {
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_OV_RES, "bd70528-bat-ov-res"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_OV_DET, "bd70528-bat-ov-det"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DBAT_DET, "bd70528-bat-dead"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_COLD_RES, "bd70528-bat-warmed"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_COLD_DET, "bd70528-bat-cold"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_HOT_RES, "bd70528-bat-cooled"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_HOT_DET, "bd70528-bat-hot"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_CHG_TSD, "bd70528-chg-tshd"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_RMV, "bd70528-bat-removed"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_DET, "bd70528-bat-detected"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_OV_RES, "bd70528-dcin2-ov-res"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_OV_DET, "bd70528-dcin2-ov-det"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_RMV, "bd70528-dcin2-removed"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_DET, "bd70528-dcin2-detected"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN1_RMV, "bd70528-dcin1-removed"),
+	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN1_DET, "bd70528-dcin1-detected"),
+};
+
+static struct mfd_cell bd70528_mfd_cells[] = {
+	{ .name = "bd70528-pmic", },
+	{ .name = "bd70528-gpio", },
+	/*
+	 * We use BD71837 driver to drive the clock block. Only differences to
+	 * BD70528 clock gate are the register address and mask.
+	 */
+	{ .name = "bd718xx-clk", },
+	{ .name = "bd70528-wdt", },
+	{
+		.name = "bd70528-power",
+		.resources = charger_irqs,
+		.num_resources = ARRAY_SIZE(charger_irqs),
+	}, {
+		.name = "bd70528-rtc",
+		.resources = rtc_irqs,
+		.num_resources = ARRAY_SIZE(rtc_irqs),
+	},
+};
+
+static const struct regmap_range volatile_ranges[] = {
+	{
+		.range_min = BD70528_REG_INT_MAIN,
+		.range_max = BD70528_REG_INT_OP_FAIL,
+	}, {
+		.range_min = BD70528_REG_RTC_COUNT_H,
+		.range_max = BD70528_REG_RTC_ALM_REPEAT,
+	}, {
+		/*
+		 * WDT control reg is special. Magic values must be written to
+		 * it in order to change the control. Should not be cached.
+		 */
+		.range_min = BD70528_REG_WDT_CTRL,
+		.range_max = BD70528_REG_WDT_CTRL,
+	}, {
+		/*
+		 * BD70528 also contains a few other registers which require
+		 * magic sequences to be written in order to update the value.
+		 * At least SHIPMODE, HWRESET, WARMRESET,and STANDBY
+		 */
+		.range_min = BD70528_REG_SHIPMODE,
+		.range_max = BD70528_REG_STANDBY,
+	},
+};
+
+static const struct regmap_access_table volatile_regs = {
+	.yes_ranges = &volatile_ranges[0],
+	.n_yes_ranges = ARRAY_SIZE(volatile_ranges),
+};
+
+static struct regmap_config bd70528_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.volatile_table = &volatile_regs,
+	.max_register = BD70528_MAX_REGISTER,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+/*
+ * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
+ * access corect sub-IRQ registers based on bits that are set in main IRQ
+ * register.
+ */
+
+/* bit [0] - Shutdown register */
+unsigned int bit0_offsets[] = {0};	/* Shutdown register */
+unsigned int bit1_offsets[] = {1};	/* Power failure register */
+unsigned int bit2_offsets[] = {2};	/* VR FAULT register */
+unsigned int bit3_offsets[] = {3};	/* PMU register interrupts */
+unsigned int bit4_offsets[] = {4, 5};	/* Charger 1 and Charger 2 registers */
+unsigned int bit5_offsets[] = {6};	/* RTC register */
+unsigned int bit6_offsets[] = {7};	/* GPIO register */
+unsigned int bit7_offsets[] = {8};	/* Invalid operation register */
+
+static struct regmap_irq_sub_irq_map bd70528_sub_irq_offsets[] = {
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
+	REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
+};
+
+static struct regmap_irq bd70528_irqs[] = {
+	REGMAP_IRQ_REG(BD70528_INT_LONGPUSH, 0, BD70528_INT_LONGPUSH_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_WDT, 0, BD70528_INT_WDT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_HWRESET, 0, BD70528_INT_HWRESET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_RSTB_FAULT, 0, BD70528_INT_RSTB_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_VBAT_UVLO, 0, BD70528_INT_VBAT_UVLO_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_TSD, 0, BD70528_INT_TSD_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_RSTIN, 0, BD70528_INT_RSTIN_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK1_FAULT, 1,
+		       BD70528_INT_BUCK1_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK2_FAULT, 1,
+		       BD70528_INT_BUCK2_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK3_FAULT, 1,
+		       BD70528_INT_BUCK3_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LDO1_FAULT, 1, BD70528_INT_LDO1_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LDO2_FAULT, 1, BD70528_INT_LDO2_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LDO3_FAULT, 1, BD70528_INT_LDO3_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LED1_FAULT, 1, BD70528_INT_LED1_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LED2_FAULT, 1, BD70528_INT_LED2_FAULT_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK1_OCP, 2, BD70528_INT_BUCK1_OCP_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK2_OCP, 2, BD70528_INT_BUCK2_OCP_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK3_OCP, 2, BD70528_INT_BUCK3_OCP_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LED1_OCP, 2, BD70528_INT_LED1_OCP_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LED2_OCP, 2, BD70528_INT_LED2_OCP_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK1_FULLON, 2,
+		       BD70528_INT_BUCK1_FULLON_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK2_FULLON, 2,
+		       BD70528_INT_BUCK2_FULLON_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_SHORTPUSH, 3, BD70528_INT_SHORTPUSH_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_AUTO_WAKEUP, 3,
+		       BD70528_INT_AUTO_WAKEUP_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_STATE_CHANGE, 3,
+		       BD70528_INT_STATE_CHANGE_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BAT_OV_RES, 4, BD70528_INT_BAT_OV_RES_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BAT_OV_DET, 4, BD70528_INT_BAT_OV_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DBAT_DET, 4, BD70528_INT_DBAT_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_RES, 4,
+		       BD70528_INT_BATTSD_COLD_RES_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_DET, 4,
+		       BD70528_INT_BATTSD_COLD_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_RES, 4,
+		       BD70528_INT_BATTSD_HOT_RES_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_DET, 4,
+		       BD70528_INT_BATTSD_HOT_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_CHG_TSD, 4, BD70528_INT_CHG_TSD_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BAT_RMV, 5, BD70528_INT_BAT_RMV_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BAT_DET, 5, BD70528_INT_BAT_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_RES, 5,
+		       BD70528_INT_DCIN2_OV_RES_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_DET, 5,
+		       BD70528_INT_DCIN2_OV_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DCIN2_RMV, 5, BD70528_INT_DCIN2_RMV_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DCIN2_DET, 5, BD70528_INT_DCIN2_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DCIN1_RMV, 5, BD70528_INT_DCIN1_RMV_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_DCIN1_DET, 5, BD70528_INT_DCIN1_DET_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_RTC_ALARM, 6, BD70528_INT_RTC_ALARM_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_ELPS_TIM, 6, BD70528_INT_ELPS_TIM_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_GPIO0, 7, BD70528_INT_GPIO0_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_GPIO1, 7, BD70528_INT_GPIO1_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_GPIO2, 7, BD70528_INT_GPIO2_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_GPIO3, 7, BD70528_INT_GPIO3_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK1_DVS_OPFAIL, 8,
+		       BD70528_INT_BUCK1_DVS_OPFAIL_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK2_DVS_OPFAIL, 8,
+		       BD70528_INT_BUCK2_DVS_OPFAIL_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_BUCK3_DVS_OPFAIL, 8,
+		       BD70528_INT_BUCK3_DVS_OPFAIL_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LED1_VOLT_OPFAIL, 8,
+		       BD70528_INT_LED1_VOLT_OPFAIL_MASK),
+	REGMAP_IRQ_REG(BD70528_INT_LED2_VOLT_OPFAIL, 8,
+		       BD70528_INT_LED2_VOLT_OPFAIL_MASK),
+};
+
+static struct regmap_irq_chip bd70528_irq_chip = {
+	.name = "bd70528_irq",
+	.main_status = BD70528_REG_INT_MAIN,
+	.irqs = &bd70528_irqs[0],
+	.num_irqs = ARRAY_SIZE(bd70528_irqs),
+	.status_base = BD70528_REG_INT_SHDN,
+	.mask_base = BD70528_REG_INT_SHDN_MASK,
+	.ack_base = BD70528_REG_INT_SHDN,
+	.type_base = BD70528_REG_GPIO1_IN,
+	.init_ack_masked = true,
+	.num_regs = 9,
+	.num_main_regs = 1,
+	.num_type_reg = 4,
+	.sub_reg_offsets = &bd70528_sub_irq_offsets[0],
+	.num_main_status_bits = 8,
+	.irq_reg_stride = 1,
+};
+
+static int bd70528_i2c_probe(struct i2c_client *i2c,
+			     const struct i2c_device_id *id)
+{
+	struct bd70528_data *bd70528;
+	struct regmap_irq_chip_data *irq_data;
+	int ret, i;
+
+	if (!i2c->irq) {
+		dev_err(&i2c->dev, "No IRQ configured\n");
+		return -EINVAL;
+	}
+
+	bd70528 = devm_kzalloc(&i2c->dev, sizeof(*bd70528), GFP_KERNEL);
+	if (!bd70528)
+		return -ENOMEM;
+
+	mutex_init(&bd70528->rtc_timer_lock);
+
+	dev_set_drvdata(&i2c->dev, &bd70528->chip);
+
+	bd70528->chip.chip_type = ROHM_CHIP_TYPE_BD70528;
+	bd70528->chip.regmap = devm_regmap_init_i2c(i2c, &bd70528_regmap);
+	if (IS_ERR(bd70528->chip.regmap)) {
+		dev_err(&i2c->dev, "Failed to initialize Regmap\n");
+		return PTR_ERR(bd70528->chip.regmap);
+	}
+
+	/*
+	 * Disallow type setting for all IRQs by default as most of them do not
+	 * support setting type.
+	 */
+	for (i = 0; i < ARRAY_SIZE(bd70528_irqs); i++)
+		bd70528_irqs[i].type.types_supported = 0;
+
+	/* Set IRQ typesetting information for GPIO pins 0 - 3 */
+	for (i = 0; i < BD70528_NUM_OF_GPIOS; i++) {
+		struct regmap_irq_type *type;
+
+		type = &bd70528_irqs[BD70528_INT_GPIO0 + i].type;
+		type->type_reg_offset = 2 * i;
+		type->type_rising_val = 0x20;
+		type->type_falling_val = 0x10;
+		type->type_level_high_val = 0x40;
+		type->type_level_low_val = 0x50;
+		type->types_supported = (IRQ_TYPE_EDGE_BOTH |
+				IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
+	}
+
+	ret = devm_regmap_add_irq_chip(&i2c->dev, bd70528->chip.regmap,
+				       i2c->irq, IRQF_ONESHOT, 0,
+				       &bd70528_irq_chip, &irq_data);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to add IRQ chip\n");
+		return ret;
+	}
+	dev_dbg(&i2c->dev, "Registered %d IRQs for chip\n",
+		bd70528_irq_chip.num_irqs);
+
+	/*
+	 * BD70528 IRQ controller is not touching the main mask register.
+	 * So enable the GPIO block interrupts at main level. We can just leave
+	 * them enabled as the IRQ controller should disable IRQs from
+	 * sub-registers when IRQ is disabled or freed.
+	 */
+	ret = regmap_update_bits(bd70528->chip.regmap,
+				 BD70528_REG_INT_MAIN_MASK,
+				 BD70528_INT_GPIO_MASK, 0);
+
+	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
+				   bd70528_mfd_cells,
+				   ARRAY_SIZE(bd70528_mfd_cells), NULL, 0,
+				   regmap_irq_get_domain(irq_data));
+	if (ret)
+		dev_err(&i2c->dev, "Failed to create subdevices\n");
+
+	return ret;
+}
+
+static const struct of_device_id bd70528_of_match[] = {
+	{ .compatible = "rohm,bd70528", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, bd70528_of_match);
+
+static struct i2c_driver bd70528_drv = {
+	.driver = {
+		.name = "rohm-bd70528",
+		.of_match_table = bd70528_of_match,
+	},
+	.probe = &bd70528_i2c_probe,
+};
+
+module_i2c_driver(bd70528_drv);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("ROHM BD70528 Power Management IC driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/rohm-bd70528.h b/include/linux/mfd/rohm-bd70528.h
new file mode 100644
index 000000000000..1013e60c5b25
--- /dev/null
+++ b/include/linux/mfd/rohm-bd70528.h
@@ -0,0 +1,408 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2018 ROHM Semiconductors */
+
+#ifndef __LINUX_MFD_BD70528_H__
+#define __LINUX_MFD_BD70528_H__
+
+#include <linux/bits.h>
+#include <linux/device.h>
+#include <linux/mfd/rohm-generic.h>
+#include <linux/regmap.h>
+
+enum {
+	BD70528_BUCK1,
+	BD70528_BUCK2,
+	BD70528_BUCK3,
+	BD70528_LDO1,
+	BD70528_LDO2,
+	BD70528_LDO3,
+	BD70528_LED1,
+	BD70528_LED2,
+};
+
+struct bd70528_data {
+	struct rohm_regmap_dev chip;
+	struct mutex rtc_timer_lock;
+};
+
+#define BD70528_BUCK_VOLTS 17
+#define BD70528_BUCK_VOLTS 17
+#define BD70528_BUCK_VOLTS 17
+#define BD70528_LDO_VOLTS 0x20
+
+#define BD70528_REG_BUCK1_EN	0x0F
+#define BD70528_REG_BUCK1_VOLT	0x15
+#define BD70528_REG_BUCK2_EN	0x10
+#define BD70528_REG_BUCK2_VOLT	0x16
+#define BD70528_REG_BUCK3_EN	0x11
+#define BD70528_REG_BUCK3_VOLT	0x17
+#define BD70528_REG_LDO1_EN	0x1b
+#define BD70528_REG_LDO1_VOLT	0x1e
+#define BD70528_REG_LDO2_EN	0x1c
+#define BD70528_REG_LDO2_VOLT	0x1f
+#define BD70528_REG_LDO3_EN	0x1d
+#define BD70528_REG_LDO3_VOLT	0x20
+#define BD70528_REG_LED_CTRL	0x2b
+#define BD70528_REG_LED_VOLT	0x29
+#define BD70528_REG_LED_EN	0x2a
+
+/* main irq registers */
+#define BD70528_REG_INT_MAIN	0x7E
+#define BD70528_REG_INT_MAIN_MASK 0x74
+
+/* 'sub irq' registers */
+#define BD70528_REG_INT_SHDN	0x7F
+#define BD70528_REG_INT_PWR_FLT	0x80
+#define BD70528_REG_INT_VR_FLT	0x81
+#define BD70528_REG_INT_MISC	0x82
+#define BD70528_REG_INT_BAT1	0x83
+#define BD70528_REG_INT_BAT2	0x84
+#define BD70528_REG_INT_RTC	0x85
+#define BD70528_REG_INT_GPIO	0x86
+#define BD70528_REG_INT_OP_FAIL	0x87
+
+#define BD70528_REG_INT_SHDN_MASK	0x75
+#define BD70528_REG_INT_PWR_FLT_MASK	0x76
+#define BD70528_REG_INT_VR_FLT_MASK	0x77
+#define BD70528_REG_INT_MISC_MASK	0x78
+#define BD70528_REG_INT_BAT1_MASK	0x79
+#define BD70528_REG_INT_BAT2_MASK	0x7a
+#define BD70528_REG_INT_RTC_MASK	0x7b
+#define BD70528_REG_INT_GPIO_MASK	0x7c
+#define BD70528_REG_INT_OP_FAIL_MASK	0x7d
+
+/* Reset related 'magic' registers */
+#define BD70528_REG_SHIPMODE	0x03
+#define BD70528_REG_HWRESET	0x04
+#define BD70528_REG_WARMRESET	0x05
+#define BD70528_REG_STANDBY	0x06
+
+/* GPIO registers */
+#define BD70528_REG_GPIO_STATE	0x8F
+
+#define BD70528_REG_GPIO1_IN	0x4d
+#define BD70528_REG_GPIO2_IN	0x4f
+#define BD70528_REG_GPIO3_IN	0x51
+#define BD70528_REG_GPIO4_IN	0x53
+#define BD70528_REG_GPIO1_OUT	0x4e
+#define BD70528_REG_GPIO2_OUT	0x50
+#define BD70528_REG_GPIO3_OUT	0x52
+#define BD70528_REG_GPIO4_OUT	0x54
+
+/* clk control */
+
+#define BD70528_REG_CLK_OUT	0x2c
+
+/* RTC */
+
+#define BD70528_REG_RTC_COUNT_H		0x2d
+#define BD70528_REG_RTC_COUNT_L		0x2e
+#define BD70528_REG_RTC_SEC		0x2f
+#define BD70528_REG_RTC_MINUTE		0x30
+#define BD70528_REG_RTC_HOUR		0x31
+#define BD70528_REG_RTC_WEEK		0x32
+#define BD70528_REG_RTC_DAY		0x33
+#define BD70528_REG_RTC_MONTH		0x34
+#define BD70528_REG_RTC_YEAR		0x35
+
+#define BD70528_REG_RTC_ALM_SEC		0x36
+#define BD70528_REG_RTC_ALM_START	BD70528_REG_RTC_ALM_SEC
+#define BD70528_REG_RTC_ALM_MINUTE	0x37
+#define BD70528_REG_RTC_ALM_HOUR	0x38
+#define BD70528_REG_RTC_ALM_WEEK	0x39
+#define BD70528_REG_RTC_ALM_DAY		0x3a
+#define BD70528_REG_RTC_ALM_MONTH	0x3b
+#define BD70528_REG_RTC_ALM_YEAR	0x3c
+#define BD70528_REG_RTC_ALM_MASK	0x3d
+#define BD70528_REG_RTC_ALM_REPEAT	0x3e
+#define BD70528_REG_RTC_START		BD70528_REG_RTC_SEC
+
+#define BD70528_REG_RTC_WAKE_SEC	0x43
+#define BD70528_REG_RTC_WAKE_START	BD70528_REG_RTC_WAKE_SEC
+#define BD70528_REG_RTC_WAKE_MIN	0x44
+#define BD70528_REG_RTC_WAKE_HOUR	0x45
+#define BD70528_REG_RTC_WAKE_CTRL	0x46
+
+#define BD70528_REG_ELAPSED_TIMER_EN	0x42
+#define BD70528_REG_WAKE_EN		0x46
+
+/* WDT registers */
+#define BD70528_REG_WDT_CTRL		0x4A
+#define BD70528_REG_WDT_HOUR		0x49
+#define BD70528_REG_WDT_MINUTE		0x48
+#define BD70528_REG_WDT_SEC		0x47
+
+/* Charger / Battery */
+#define BD70528_REG_CHG_CURR_STAT	0x59
+#define BD70528_REG_CHG_BAT_STAT	0x57
+#define BD70528_REG_CHG_BAT_TEMP	0x58
+#define BD70528_REG_CHG_IN_STAT		0x56
+#define BD70528_REG_CHG_DCIN_ILIM	0x5d
+#define BD70528_REG_CHG_CHG_CURR_WARM	0x61
+#define BD70528_REG_CHG_CHG_CURR_COLD	0x62
+
+/* Masks for main IRQ register bits */
+enum {
+	BD70528_INT_SHDN,
+#define BD70528_INT_SHDN_MASK BIT(BD70528_INT_SHDN)
+	BD70528_INT_PWR_FLT,
+#define BD70528_INT_PWR_FLT_MASK BIT(BD70528_INT_PWR_FLT)
+	BD70528_INT_VR_FLT,
+#define BD70528_INT_VR_FLT_MASK BIT(BD70528_INT_VR_FLT)
+	BD70528_INT_MISC,
+#define BD70528_INT_MISC_MASK BIT(BD70528_INT_MISC)
+	BD70528_INT_BAT1,
+#define BD70528_INT_BAT1_MASK BIT(BD70528_INT_BAT1)
+	BD70528_INT_RTC,
+#define BD70528_INT_RTC_MASK BIT(BD70528_INT_RTC)
+	BD70528_INT_GPIO,
+#define BD70528_INT_GPIO_MASK BIT(BD70528_INT_GPIO)
+	BD70528_INT_OP_FAIL,
+#define BD70528_INT_OP_FAIL_MASK BIT(BD70528_INT_OP_FAIL)
+};
+
+/* IRQs */
+enum {
+	/* Shutdown register IRQs */
+	BD70528_INT_LONGPUSH,
+	BD70528_INT_WDT,
+	BD70528_INT_HWRESET,
+	BD70528_INT_RSTB_FAULT,
+	BD70528_INT_VBAT_UVLO,
+	BD70528_INT_TSD,
+	BD70528_INT_RSTIN,
+	/* Power failure register IRQs */
+	BD70528_INT_BUCK1_FAULT,
+	BD70528_INT_BUCK2_FAULT,
+	BD70528_INT_BUCK3_FAULT,
+	BD70528_INT_LDO1_FAULT,
+	BD70528_INT_LDO2_FAULT,
+	BD70528_INT_LDO3_FAULT,
+	BD70528_INT_LED1_FAULT,
+	BD70528_INT_LED2_FAULT,
+	/* VR FAULT register IRQs */
+	BD70528_INT_BUCK1_OCP,
+	BD70528_INT_BUCK2_OCP,
+	BD70528_INT_BUCK3_OCP,
+	BD70528_INT_LED1_OCP,
+	BD70528_INT_LED2_OCP,
+	BD70528_INT_BUCK1_FULLON,
+	BD70528_INT_BUCK2_FULLON,
+	/* PMU register interrupts */
+	BD70528_INT_SHORTPUSH,
+	BD70528_INT_AUTO_WAKEUP,
+	BD70528_INT_STATE_CHANGE,
+	/* Charger 1 register IRQs */
+	BD70528_INT_BAT_OV_RES,
+	BD70528_INT_BAT_OV_DET,
+	BD70528_INT_DBAT_DET,
+	BD70528_INT_BATTSD_COLD_RES,
+	BD70528_INT_BATTSD_COLD_DET,
+	BD70528_INT_BATTSD_HOT_RES,
+	BD70528_INT_BATTSD_HOT_DET,
+	BD70528_INT_CHG_TSD,
+	/* Charger 2 register IRQs */
+	BD70528_INT_BAT_RMV,
+	BD70528_INT_BAT_DET,
+	BD70528_INT_DCIN2_OV_RES,
+	BD70528_INT_DCIN2_OV_DET,
+	BD70528_INT_DCIN2_RMV,
+	BD70528_INT_DCIN2_DET,
+	BD70528_INT_DCIN1_RMV,
+	BD70528_INT_DCIN1_DET,
+	/* RTC register IRQs */
+	BD70528_INT_RTC_ALARM,
+	BD70528_INT_ELPS_TIM,
+	/* GPIO register IRQs */
+	BD70528_INT_GPIO0,
+	BD70528_INT_GPIO1,
+	BD70528_INT_GPIO2,
+	BD70528_INT_GPIO3,
+	/* Invalid operation register IRQs */
+	BD70528_INT_BUCK1_DVS_OPFAIL,
+	BD70528_INT_BUCK2_DVS_OPFAIL,
+	BD70528_INT_BUCK3_DVS_OPFAIL,
+	BD70528_INT_LED1_VOLT_OPFAIL,
+	BD70528_INT_LED2_VOLT_OPFAIL,
+};
+
+/* Masks */
+#define BD70528_INT_LONGPUSH_MASK 0x1
+#define BD70528_INT_WDT_MASK 0x2
+#define BD70528_INT_HWRESET_MASK 0x4
+#define BD70528_INT_RSTB_FAULT_MASK 0x8
+#define BD70528_INT_VBAT_UVLO_MASK 0x10
+#define BD70528_INT_TSD_MASK 0x20
+#define BD70528_INT_RSTIN_MASK 0x40
+
+#define BD70528_INT_BUCK1_FAULT_MASK 0x1
+#define BD70528_INT_BUCK2_FAULT_MASK 0x2
+#define BD70528_INT_BUCK3_FAULT_MASK 0x4
+#define BD70528_INT_LDO1_FAULT_MASK 0x8
+#define BD70528_INT_LDO2_FAULT_MASK 0x10
+#define BD70528_INT_LDO3_FAULT_MASK 0x20
+#define BD70528_INT_LED1_FAULT_MASK 0x40
+#define BD70528_INT_LED2_FAULT_MASK 0x80
+
+#define BD70528_INT_BUCK1_OCP_MASK 0x1
+#define BD70528_INT_BUCK2_OCP_MASK 0x2
+#define BD70528_INT_BUCK3_OCP_MASK 0x4
+#define BD70528_INT_LED1_OCP_MASK 0x8
+#define BD70528_INT_LED2_OCP_MASK 0x10
+#define BD70528_INT_BUCK1_FULLON_MASK 0x20
+#define BD70528_INT_BUCK2_FULLON_MASK 0x40
+
+#define BD70528_INT_SHORTPUSH_MASK 0x1
+#define BD70528_INT_AUTO_WAKEUP_MASK 0x2
+#define BD70528_INT_STATE_CHANGE_MASK 0x10
+
+#define BD70528_INT_BAT_OV_RES_MASK 0x1
+#define BD70528_INT_BAT_OV_DET_MASK 0x2
+#define BD70528_INT_DBAT_DET_MASK 0x4
+#define BD70528_INT_BATTSD_COLD_RES_MASK 0x8
+#define BD70528_INT_BATTSD_COLD_DET_MASK 0x10
+#define BD70528_INT_BATTSD_HOT_RES_MASK 0x20
+#define BD70528_INT_BATTSD_HOT_DET_MASK 0x40
+#define BD70528_INT_CHG_TSD_MASK 0x80
+
+#define BD70528_INT_BAT_RMV_MASK 0x1
+#define BD70528_INT_BAT_DET_MASK 0x2
+#define BD70528_INT_DCIN2_OV_RES_MASK 0x4
+#define BD70528_INT_DCIN2_OV_DET_MASK 0x8
+#define BD70528_INT_DCIN2_RMV_MASK 0x10
+#define BD70528_INT_DCIN2_DET_MASK 0x20
+#define BD70528_INT_DCIN1_RMV_MASK 0x40
+#define BD70528_INT_DCIN1_DET_MASK 0x80
+
+#define BD70528_INT_RTC_ALARM_MASK 0x1
+#define BD70528_INT_ELPS_TIM_MASK 0x2
+
+#define BD70528_INT_GPIO0_MASK 0x1
+#define BD70528_INT_GPIO1_MASK 0x2
+#define BD70528_INT_GPIO2_MASK 0x4
+#define BD70528_INT_GPIO3_MASK 0x8
+
+#define BD70528_INT_BUCK1_DVS_OPFAIL_MASK 0x1
+#define BD70528_INT_BUCK2_DVS_OPFAIL_MASK 0x2
+#define BD70528_INT_BUCK3_DVS_OPFAIL_MASK 0x4
+#define BD70528_INT_LED1_VOLT_OPFAIL_MASK 0x10
+#define BD70528_INT_LED2_VOLT_OPFAIL_MASK 0x20
+
+#define BD70528_DEBOUNCE_MASK 0x3
+
+#define BD70528_DEBOUNCE_DISABLE 0
+#define BD70528_DEBOUNCE_15MS 1
+#define BD70528_DEBOUNCE_30MS 2
+#define BD70528_DEBOUNCE_50MS 3
+
+#define BD70528_GPIO_DRIVE_MASK 0x2
+#define BD70528_GPIO_PUSH_PULL 0x0
+#define BD70528_GPIO_OPEN_DRAIN 0x2
+
+#define BD70528_GPIO_OUT_EN_MASK 0x80
+#define BD70528_GPIO_OUT_ENABLE 0x80
+#define BD70528_GPIO_OUT_DISABLE 0x0
+
+#define BD70528_GPIO_OUT_HI 0x1
+#define BD70528_GPIO_OUT_LO 0x0
+#define BD70528_GPIO_OUT_MASK 0x1
+
+#define BD70528_GPIO_IN_STATE_BASE 1
+
+#define BD70528_CLK_OUT_EN_MASK 0x1
+
+/* RTC masks to mask out reserved bits */
+
+#define BD70528_MASK_RTC_SEC		0x7f
+#define BD70528_MASK_RTC_MINUTE		0x7f
+#define BD70528_MASK_RTC_HOUR_24H	0x80
+#define BD70528_MASK_RTC_HOUR_PM	0x20
+#define BD70528_MASK_RTC_HOUR		0x1f
+#define BD70528_MASK_RTC_DAY		0x3f
+#define BD70528_MASK_RTC_WEEK		0x07
+#define BD70528_MASK_RTC_MONTH		0x1f
+#define BD70528_MASK_RTC_YEAR		0xff
+#define BD70528_MASK_RTC_COUNT_L	0x7f
+
+#define BD70528_MASK_ELAPSED_TIMER_EN	0x1
+/* Mask second, min and hour fields
+ * HW would support ALM irq for over 24h
+ * (by setting day, month and year too)
+ * but as we wish to keep this same as for
+ * wake-up we limit ALM to 24H and only
+ * unmask sec, min and hour
+ */
+#define BD70528_MASK_ALM_EN		0x7
+#define BD70528_MASK_WAKE_EN		0x1
+
+/* WDT masks */
+#define BD70528_MASK_WDT_EN		0x1
+#define BD70528_MASK_WDT_HOUR		0x1
+#define BD70528_MASK_WDT_MINUTE		0x7f
+#define BD70528_MASK_WDT_SEC		0x7f
+
+#define BD70528_WDT_STATE_BIT		0x1
+#define BD70528_ELAPSED_STATE_BIT	0x2
+#define BD70528_WAKE_STATE_BIT		0x4
+
+/* Charger masks */
+#define BD70528_MASK_CHG_STAT		0x7f
+#define BD70528_MASK_CHG_BAT_TIMER	0x20
+#define BD70528_MASK_CHG_BAT_OVERVOLT	0x10
+#define BD70528_MASK_CHG_BAT_DETECT	0x1
+#define BD70528_MASK_CHG_DCIN1_UVLO	0x1
+#define BD70528_MASK_CHG_DCIN_ILIM	0x3f
+#define BD70528_MASK_CHG_CHG_CURR	0x1f
+#define BD70528_MASK_CHG_TRICKLE_CURR	0x10
+
+/*
+ * Note, external battery register is the lonely rider at
+ * address 0xc5. See how to stuff that in the regmap
+ */
+#define BD70528_MAX_REGISTER 0x94
+
+/* Buck control masks */
+#define BD70528_MASK_RUN_EN	0x4
+#define BD70528_MASK_STBY_EN	0x2
+#define BD70528_MASK_IDLE_EN	0x1
+#define BD70528_MASK_LED1_EN	0x1
+#define BD70528_MASK_LED2_EN	0x10
+
+#define BD70528_MASK_BUCK_VOLT	0xf
+#define BD70528_MASK_LDO_VOLT	0x1f
+#define BD70528_MASK_LED1_VOLT	0x1
+#define BD70528_MASK_LED2_VOLT	0x10
+
+/* Misc irq masks */
+#define BD70528_INT_MASK_SHORT_PUSH	1
+#define BD70528_INT_MASK_AUTO_WAKE	2
+#define BD70528_INT_MASK_POWER_STATE	4
+
+#define BD70528_MASK_BUCK_RAMP 0x10
+#define BD70528_SIFT_BUCK_RAMP 4
+
+#if IS_ENABLED(CONFIG_BD70528_WATCHDOG)
+
+int bd70528_wdt_set(struct rohm_regmap_dev *data, int enable, int *old_state);
+void bd70528_wdt_lock(struct rohm_regmap_dev *data);
+void bd70528_wdt_unlock(struct rohm_regmap_dev *data);
+
+#else /* CONFIG_BD70528_WATCHDOG */
+
+static inline int bd70528_wdt_set(struct rohm_regmap_dev *data, int enable,
+				  int *old_state)
+{
+	return 0;
+}
+
+static inline void bd70528_wdt_lock(struct rohm_regmap_dev *data)
+{
+}
+
+static inline void bd70528_wdt_unlock(struct rohm_regmap_dev *data)
+{
+}
+
+#endif /* CONFIG_BD70528_WATCHDOG */
+
+#endif /* __LINUX_MFD_BD70528_H__ */
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 3/7] clk: bd718x7: Support ROHM BD70528 clk block
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
  2019-06-03  7:24 ` [PATCH v15 1/7] mfd: regulator: clk: split rohm-bd718x7.h Matti Vaittinen
  2019-06-03  7:25 ` [PATCH v15 2/7] mfd: bd70528: Support ROHM bd70528 PMIC - core Matti Vaittinen
@ 2019-06-03  7:25 ` Matti Vaittinen
  2019-06-03  7:26 ` [PATCH v15 4/7] dt-bindings: mfd: Document first ROHM BD70528 bindings Matti Vaittinen
                   ` (5 subsequent siblings)
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:25 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

ROHM BD70528 is an ultra low power PMIC with similar 32K clk as
bd718x7. Only difference (from clk perspective) is register address.
Add support for controlling BD70528 clk using bd718x7 driver.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
---
Unchanged from v14

 drivers/clk/Kconfig       |  6 +++---
 drivers/clk/clk-bd718x7.c | 20 ++++++++++++++++----
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index fc1e0cf44995..dd411c86b979 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -293,10 +293,10 @@ config COMMON_CLK_STM32H7
 
 config COMMON_CLK_BD718XX
 	tristate "Clock driver for ROHM BD718x7 PMIC"
-	depends on MFD_ROHM_BD718XX
+	depends on MFD_ROHM_BD718XX || MFD_ROHM_BD70528
 	help
-	  This driver supports ROHM BD71837 and ROHM BD71847
-	  PMICs clock gates.
+	  This driver supports ROHM BD71837, ROHM BD71847 and
+	  ROHM BD70528 PMICs clock gates.
 
 config COMMON_CLK_FIXED_MMIO
 	bool "Clock driver for Memory Mapped Fixed values"
diff --git a/drivers/clk/clk-bd718x7.c b/drivers/clk/clk-bd718x7.c
index 461228ebf703..ae6e5baee330 100644
--- a/drivers/clk/clk-bd718x7.c
+++ b/drivers/clk/clk-bd718x7.c
@@ -8,6 +8,7 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/mfd/rohm-bd718x7.h>
+#include <linux/mfd/rohm-bd70528.h>
 #include <linux/clk-provider.h>
 #include <linux/clkdev.h>
 #include <linux/regmap.h>
@@ -86,9 +87,20 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "No parent clk found\n");
 		return -EINVAL;
 	}
-
-	c->reg = BD718XX_REG_OUT32K;
-	c->mask = BD718XX_OUT32K_EN;
+	switch (mfd->chip_type) {
+	case ROHM_CHIP_TYPE_BD71837:
+	case ROHM_CHIP_TYPE_BD71847:
+		c->reg = BD718XX_REG_OUT32K;
+		c->mask = BD718XX_OUT32K_EN;
+		break;
+	case ROHM_CHIP_TYPE_BD70528:
+		c->reg = BD70528_REG_CLK_OUT;
+		c->mask = BD70528_CLK_OUT_EN_MASK;
+		break;
+	default:
+		dev_err(&pdev->dev, "Unknown clk chip\n");
+		return -EINVAL;
+	}
 	c->mfd = mfd;
 	c->pdev = pdev;
 	c->hw.init = &init;
@@ -119,5 +131,5 @@ static struct platform_driver bd71837_clk = {
 module_platform_driver(bd71837_clk);
 
 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
-MODULE_DESCRIPTION("BD71837/BD71847 chip clk driver");
+MODULE_DESCRIPTION("BD71837/BD71847/BD70528 chip clk driver");
 MODULE_LICENSE("GPL");
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 4/7] dt-bindings: mfd: Document first ROHM BD70528 bindings
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
                   ` (2 preceding siblings ...)
  2019-06-03  7:25 ` [PATCH v15 3/7] clk: bd718x7: Support ROHM BD70528 clk block Matti Vaittinen
@ 2019-06-03  7:26 ` Matti Vaittinen
  2019-06-03  7:26 ` [PATCH v15 5/7] gpio: Initial support for ROHM bd70528 GPIO block Matti Vaittinen
                   ` (4 subsequent siblings)
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:26 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

Document bindings for regulators (3 bucks, 3 LDOs and 2 LED
drivers) and 4 GPIO pins which can be configured for I/O or
as interrupt sources withe configurable trigger levels.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
---
Unchanged from v14

 .../bindings/mfd/rohm,bd70528-pmic.txt        | 102 ++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt

diff --git a/Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt b/Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt
new file mode 100644
index 000000000000..c3c02ce73cde
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt
@@ -0,0 +1,102 @@
+* ROHM BD70528 Power Management Integrated Circuit bindings
+
+BD70528MWV is an ultra-low quiescent current general purpose, single-chip,
+power management IC for battery-powered portable devices. The IC
+integrates 3 ultra-low current consumption buck converters, 3 LDOs and 2
+LED Drivers. Also included are 4 GPIOs, a real-time clock (RTC), a 32kHz
+clock gate, high-accuracy VREF for use with an external ADC, flexible
+dual-input power path, 10 bit SAR ADC for battery temperature monitor and
+1S battery charger with scalable charge currents.
+
+Required properties:
+ - compatible		: Should be "rohm,bd70528"
+ - reg			: I2C slave address.
+ - interrupts		: The interrupt line the device is connected to.
+ - interrupt-controller	: To indicate BD70528 acts as an interrupt controller.
+ - #interrupt-cells	: Should be 2. Usage is compliant to the 2 cells
+			  variant of ../interrupt-controller/interrupts.txt
+ - gpio-controller	: To indicate BD70528 acts as a GPIO controller.
+ - #gpio-cells		: Should be 2. The first cell is the pin number and
+			  the second cell is used to specify flags. See
+			  ../gpio/gpio.txt for more information.
+ - #clock-cells		: Should be 0.
+ - regulators:		: List of child nodes that specify the regulators.
+			  Please see ../regulator/rohm,bd70528-regulator.txt
+
+Optional properties:
+ - clock-output-names	: Should contain name for output clock.
+
+Example:
+/* External oscillator */
+osc: oscillator {
+	compatible = "fixed-clock";
+	#clock-cells = <1>;
+	clock-frequency  = <32768>;
+	clock-output-names = "osc";
+};
+
+pmic: pmic@4b {
+	compatible = "rohm,bd70528";
+	reg = <0x4b>;
+	interrupt-parent = <&gpio1>;
+	interrupts = <29 GPIO_ACTIVE_LOW>;
+	clocks = <&osc 0>;
+	#clock-cells = <0>;
+	clock-output-names = "bd70528-32k-out";
+	#gpio-cells = <2>;
+	gpio-controller;
+	interrupt-controller;
+	#interrupt-cells = <2>;
+
+	regulators {
+		buck1: BUCK1 {
+			regulator-name = "buck1";
+			regulator-min-microvolt = <1200000>;
+			regulator-max-microvolt = <3400000>;
+			regulator-boot-on;
+			regulator-ramp-delay = <125>;
+		};
+		buck2: BUCK2 {
+			regulator-name = "buck2";
+			regulator-min-microvolt = <1200000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-boot-on;
+			regulator-ramp-delay = <125>;
+		};
+		buck3: BUCK3 {
+			regulator-name = "buck3";
+			regulator-min-microvolt = <800000>;
+			regulator-max-microvolt = <1800000>;
+			regulator-boot-on;
+			regulator-ramp-delay = <250>;
+		};
+		ldo1: LDO1 {
+			regulator-name = "ldo1";
+			regulator-min-microvolt = <1650000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-boot-on;
+		};
+		ldo2: LDO2 {
+			regulator-name = "ldo2";
+			regulator-min-microvolt = <1650000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-boot-on;
+		};
+
+		ldo3: LDO3 {
+			regulator-name = "ldo3";
+			regulator-min-microvolt = <1650000>;
+			regulator-max-microvolt = <3300000>;
+		};
+		led_ldo1: LED_LDO1 {
+			regulator-name = "led_ldo1";
+			regulator-min-microvolt = <200000>;
+			regulator-max-microvolt = <300000>;
+		};
+		led_ldo2: LED_LDO2 {
+			regulator-name = "led_ldo2";
+			regulator-min-microvolt = <200000>;
+			regulator-max-microvolt = <300000>;
+		};
+	};
+};
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 5/7] gpio: Initial support for ROHM bd70528 GPIO block
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
                   ` (3 preceding siblings ...)
  2019-06-03  7:26 ` [PATCH v15 4/7] dt-bindings: mfd: Document first ROHM BD70528 bindings Matti Vaittinen
@ 2019-06-03  7:26 ` Matti Vaittinen
  2019-06-03  7:27 ` [PATCH v15 6/7] rtc: bd70528: Initial support for ROHM bd70528 RTC Matti Vaittinen
                   ` (3 subsequent siblings)
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:26 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

ROHM BD70528 PMIC has 4 GPIO pins. Allow them to be
controlled by GPIO framework.

IRQs are handled by regmap-irq and GPIO driver is not
aware of the irq usage.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
Unchanged from v14

 drivers/gpio/Kconfig        |  11 ++
 drivers/gpio/Makefile       |   1 +
 drivers/gpio/gpio-bd70528.c | 232 ++++++++++++++++++++++++++++++++++++
 3 files changed, 244 insertions(+)
 create mode 100644 drivers/gpio/gpio-bd70528.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index acd40eb51c46..cc2f2e495925 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -979,6 +979,17 @@ config GPIO_ARIZONA
 	help
 	  Support for GPIOs on Wolfson Arizona class devices.
 
+config GPIO_BD70528
+	tristate "ROHM BD70528 GPIO support"
+	depends on MFD_ROHM_BD70528
+	help
+	  Support for GPIOs on ROHM BD70528 PMIC. There are four GPIOs
+	  available on the ROHM PMIC in total. The GPIOs can also
+	  generate interrupts.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called gpio-bd70528.
+
 config GPIO_BD9571MWV
 	tristate "ROHM BD9571 GPIO support"
 	depends on MFD_BD9571MWV
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 6700eee860b7..10efc4f743fe 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_GPIO_ATH79)	+= gpio-ath79.o
 obj-$(CONFIG_GPIO_ASPEED)	+= gpio-aspeed.o
 obj-$(CONFIG_GPIO_RASPBERRYPI_EXP)	+= gpio-raspberrypi-exp.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
+obj-$(CONFIG_GPIO_BD70528) 	+= gpio-bd70528.o
 obj-$(CONFIG_GPIO_BD9571MWV)	+= gpio-bd9571mwv.o
 obj-$(CONFIG_GPIO_BRCMSTB)	+= gpio-brcmstb.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
diff --git a/drivers/gpio/gpio-bd70528.c b/drivers/gpio/gpio-bd70528.c
new file mode 100644
index 000000000000..fd85605d2dab
--- /dev/null
+++ b/drivers/gpio/gpio-bd70528.c
@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 ROHM Semiconductors
+// gpio-bd70528.c ROHM BD70528MWV gpio driver
+
+#include <linux/gpio/driver.h>
+#include <linux/mfd/rohm-bd70528.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define GPIO_IN_REG(offset) (BD70528_REG_GPIO1_IN + (offset) * 2)
+#define GPIO_OUT_REG(offset) (BD70528_REG_GPIO1_OUT + (offset) * 2)
+
+struct bd70528_gpio {
+	struct rohm_regmap_dev chip;
+	struct gpio_chip gpio;
+};
+
+static int bd70528_set_debounce(struct bd70528_gpio *bdgpio,
+				unsigned int offset, unsigned int debounce)
+{
+	u8 val;
+
+	switch (debounce) {
+	case 0:
+		val = BD70528_DEBOUNCE_DISABLE;
+		break;
+	case 1 ... 15:
+		val = BD70528_DEBOUNCE_15MS;
+		break;
+	case 16 ... 30:
+		val = BD70528_DEBOUNCE_30MS;
+		break;
+	case 31 ... 50:
+		val = BD70528_DEBOUNCE_50MS;
+		break;
+	default:
+		dev_err(bdgpio->chip.dev,
+			"Invalid debouce value %u\n", debounce);
+		return -EINVAL;
+	}
+	return regmap_update_bits(bdgpio->chip.regmap, GPIO_IN_REG(offset),
+				 BD70528_DEBOUNCE_MASK, val);
+}
+
+static int bd70528_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+	struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
+	int val, ret;
+
+	/* Do we need to do something to IRQs here? */
+	ret = regmap_read(bdgpio->chip.regmap, GPIO_OUT_REG(offset), &val);
+	if (ret) {
+		dev_err(bdgpio->chip.dev, "Could not read gpio direction\n");
+		return ret;
+	}
+
+	return !(val & BD70528_GPIO_OUT_EN_MASK);
+}
+
+static int bd70528_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+				   unsigned long config)
+{
+	struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
+
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+		return regmap_update_bits(bdgpio->chip.regmap,
+					  GPIO_OUT_REG(offset),
+					  BD70528_GPIO_DRIVE_MASK,
+					  BD70528_GPIO_OPEN_DRAIN);
+		break;
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		return regmap_update_bits(bdgpio->chip.regmap,
+					  GPIO_OUT_REG(offset),
+					  BD70528_GPIO_DRIVE_MASK,
+					  BD70528_GPIO_PUSH_PULL);
+		break;
+	case PIN_CONFIG_INPUT_DEBOUNCE:
+		return bd70528_set_debounce(bdgpio, offset,
+					    pinconf_to_config_argument(config));
+		break;
+	default:
+		break;
+	}
+	return -ENOTSUPP;
+}
+
+static int bd70528_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+	struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
+
+	/* Do we need to do something to IRQs here? */
+	return regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+				 BD70528_GPIO_OUT_EN_MASK,
+				 BD70528_GPIO_OUT_DISABLE);
+}
+
+static void bd70528_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			     int value)
+{
+	int ret;
+	struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
+	u8 val = (value) ? BD70528_GPIO_OUT_HI : BD70528_GPIO_OUT_LO;
+
+	ret = regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+				 BD70528_GPIO_OUT_MASK, val);
+	if (ret)
+		dev_err(bdgpio->chip.dev, "Could not set gpio to %d\n", value);
+}
+
+static int bd70528_direction_output(struct gpio_chip *chip, unsigned int offset,
+				    int value)
+{
+	struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
+
+	bd70528_gpio_set(chip, offset, value);
+	return regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+				 BD70528_GPIO_OUT_EN_MASK,
+				 BD70528_GPIO_OUT_ENABLE);
+}
+
+#define GPIO_IN_STATE_MASK(offset) (BD70528_GPIO_IN_STATE_BASE << (offset))
+
+static int bd70528_gpio_get_o(struct bd70528_gpio *bdgpio, unsigned int offset)
+{
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(bdgpio->chip.regmap, GPIO_OUT_REG(offset), &val);
+	if (!ret)
+		ret = !!(val & BD70528_GPIO_OUT_MASK);
+	else
+		dev_err(bdgpio->chip.dev, "GPIO (out) state read failed\n");
+
+	return ret;
+}
+
+static int bd70528_gpio_get_i(struct bd70528_gpio *bdgpio, unsigned int offset)
+{
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(bdgpio->chip.regmap, BD70528_REG_GPIO_STATE, &val);
+
+	if (!ret)
+		ret = !(val & GPIO_IN_STATE_MASK(offset));
+	else
+		dev_err(bdgpio->chip.dev, "GPIO (in) state read failed\n");
+
+	return ret;
+}
+
+static int bd70528_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	int ret = -EINVAL;
+	struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
+
+	/*
+	 * There is a race condition where someone might be changing the
+	 * GPIO direction after we get it but before we read the value. But
+	 * application design where GPIO direction may be changed just when
+	 * we read GPIO value would be pointless as reader could not know
+	 * whether the returned high/low state is caused by input or output.
+	 * Or then there must be other ways to mitigate the issue. Thus
+	 * locking would make no sense.
+	 */
+	ret = bd70528_get_direction(chip, offset);
+	if (ret == 0)
+		ret = bd70528_gpio_get_o(bdgpio, offset);
+	else if (ret == 1)
+		ret = bd70528_gpio_get_i(bdgpio, offset);
+	else
+		dev_err(bdgpio->chip.dev, "failed to read GPIO direction\n");
+
+	return ret;
+}
+
+static int bd70528_probe(struct platform_device *pdev)
+{
+	struct bd70528_gpio *bdgpio;
+	struct rohm_regmap_dev *bd70528;
+	int ret;
+
+	bd70528 = dev_get_drvdata(pdev->dev.parent);
+	if (!bd70528) {
+		dev_err(&pdev->dev, "No MFD driver data\n");
+		return -EINVAL;
+	}
+
+	bdgpio = devm_kzalloc(&pdev->dev, sizeof(*bdgpio),
+			      GFP_KERNEL);
+	if (!bdgpio)
+		return -ENOMEM;
+	bdgpio->chip.dev = &pdev->dev;
+	bdgpio->gpio.parent = pdev->dev.parent;
+	bdgpio->gpio.label = "bd70528-gpio";
+	bdgpio->gpio.owner = THIS_MODULE;
+	bdgpio->gpio.get_direction = bd70528_get_direction;
+	bdgpio->gpio.direction_input = bd70528_direction_input;
+	bdgpio->gpio.direction_output = bd70528_direction_output;
+	bdgpio->gpio.set_config = bd70528_gpio_set_config;
+	bdgpio->gpio.can_sleep = true;
+	bdgpio->gpio.get = bd70528_gpio_get;
+	bdgpio->gpio.set = bd70528_gpio_set;
+	bdgpio->gpio.ngpio = 4;
+	bdgpio->gpio.base = -1;
+#ifdef CONFIG_OF_GPIO
+	bdgpio->gpio.of_node = pdev->dev.parent->of_node;
+#endif
+	bdgpio->chip.regmap = bd70528->regmap;
+
+	ret = devm_gpiochip_add_data(&pdev->dev, &bdgpio->gpio,
+				     bdgpio);
+	if (ret)
+		dev_err(&pdev->dev, "gpio_init: Failed to add bd70528-gpio\n");
+
+	return ret;
+}
+
+static struct platform_driver bd70528_gpio = {
+	.driver = {
+		.name = "bd70528-gpio"
+	},
+	.probe = bd70528_probe,
+};
+
+module_platform_driver(bd70528_gpio);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("BD70528 voltage regulator driver");
+MODULE_LICENSE("GPL");
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 6/7] rtc: bd70528: Initial support for ROHM bd70528 RTC
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
                   ` (4 preceding siblings ...)
  2019-06-03  7:26 ` [PATCH v15 5/7] gpio: Initial support for ROHM bd70528 GPIO block Matti Vaittinen
@ 2019-06-03  7:27 ` Matti Vaittinen
  2019-06-03  7:28 ` [PATCH v15 7/7] power: supply: Initial support for ROHM BD70528 PMIC charger block Matti Vaittinen
                   ` (2 subsequent siblings)
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:27 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

Support RTC block in ROHM bd70528 power management IC. Support
getting and setting the time and date as well as arming an alarm
which can also be used to wake the PMIC from standby state.

HW supports wake interrupt only for the next 24 hours (sec, minute
and hour information only) so we limit also the alarm interrupt to
this 24 hours for the sake of consistency.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
Unchanged from v14

 drivers/rtc/Kconfig       |   8 +
 drivers/rtc/Makefile      |   1 +
 drivers/rtc/rtc-bd70528.c | 500 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 509 insertions(+)
 create mode 100644 drivers/rtc/rtc-bd70528.c

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 5c0790eed656..5528c478cf4e 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -498,6 +498,14 @@ config RTC_DRV_M41T80_WDT
 	help
 	  If you say Y here you will get support for the
 	  watchdog timer in the ST M41T60 and M41T80 RTC chips series.
+config RTC_DRV_BD70528
+	tristate "ROHM BD70528 PMIC RTC"
+	help
+	  If you say Y here you will get support for the RTC
+	  on ROHM BD70528 Power Management IC.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-bd70528.
 
 config RTC_DRV_BQ32K
 	tristate "TI BQ32000"
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 9d997faa2c26..6b09c21dc1b6 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_RTC_DRV_ASPEED)	+= rtc-aspeed.o
 obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
 obj-$(CONFIG_RTC_DRV_AT91SAM9)	+= rtc-at91sam9.o
 obj-$(CONFIG_RTC_DRV_AU1XXX)	+= rtc-au1xxx.o
+obj-$(CONFIG_RTC_DRV_BD70528)	+= rtc-bd70528.o
 obj-$(CONFIG_RTC_DRV_BQ32K)	+= rtc-bq32k.o
 obj-$(CONFIG_RTC_DRV_BQ4802)	+= rtc-bq4802.o
 obj-$(CONFIG_RTC_DRV_BRCMSTB)	+= rtc-brcmstb-waketimer.o
diff --git a/drivers/rtc/rtc-bd70528.c b/drivers/rtc/rtc-bd70528.c
new file mode 100644
index 000000000000..f9bdd555e1a2
--- /dev/null
+++ b/drivers/rtc/rtc-bd70528.c
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// Copyright (C) 2018 ROHM Semiconductors
+//
+// RTC driver for ROHM BD70528 PMIC
+
+#include <linux/bcd.h>
+#include <linux/mfd/rohm-bd70528.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+
+/*
+ * We read regs RTC_SEC => RTC_YEAR
+ * this struct is ordered according to chip registers.
+ * Keep it u8 only to avoid padding issues.
+ */
+struct bd70528_rtc_day {
+	u8 sec;
+	u8 min;
+	u8 hour;
+} __packed;
+
+struct bd70528_rtc_data {
+	struct bd70528_rtc_day time;
+	u8 week;
+	u8 day;
+	u8 month;
+	u8 year;
+} __packed;
+
+struct bd70528_rtc_wake {
+	struct bd70528_rtc_day time;
+	u8 ctrl;
+} __packed;
+
+struct bd70528_rtc_alm {
+	struct bd70528_rtc_data data;
+	u8 alm_mask;
+	u8 alm_repeat;
+} __packed;
+
+struct bd70528_rtc {
+	struct rohm_regmap_dev *mfd;
+	struct device *dev;
+};
+
+static int bd70528_set_wake(struct rohm_regmap_dev *bd70528,
+			    int enable, int *old_state)
+{
+	int ret;
+	unsigned int ctrl_reg;
+
+	ret = regmap_read(bd70528->regmap, BD70528_REG_WAKE_EN, &ctrl_reg);
+	if (ret)
+		return ret;
+
+	if (old_state) {
+		if (ctrl_reg & BD70528_MASK_WAKE_EN)
+			*old_state |= BD70528_WAKE_STATE_BIT;
+		else
+			*old_state &= ~BD70528_WAKE_STATE_BIT;
+
+		if (!enable == !(*old_state & BD70528_WAKE_STATE_BIT))
+			return 0;
+	}
+
+	if (enable)
+		ctrl_reg |= BD70528_MASK_WAKE_EN;
+	else
+		ctrl_reg &= ~BD70528_MASK_WAKE_EN;
+
+	return regmap_write(bd70528->regmap, BD70528_REG_WAKE_EN,
+			    ctrl_reg);
+}
+
+static int bd70528_set_elapsed_tmr(struct rohm_regmap_dev *bd70528,
+				   int enable, int *old_state)
+{
+	int ret;
+	unsigned int ctrl_reg;
+
+	/*
+	 * TBD
+	 * What is the purpose of elapsed timer ?
+	 * Is the timeout registers counting down, or is the disable - re-enable
+	 * going to restart the elapsed-time counting? If counting is restarted
+	 * the timeout should be decreased by the amount of time that has
+	 * elapsed since starting the timer. Maybe we should store the monotonic
+	 * clock value when timer is started so that if RTC is set while timer
+	 * is armed we could do the compensation. This is a hack if RTC/system
+	 * clk are drifting. OTOH, RTC controlled via I2C is in any case
+	 * inaccurate...
+	 */
+	ret = regmap_read(bd70528->regmap, BD70528_REG_ELAPSED_TIMER_EN,
+			  &ctrl_reg);
+	if (ret)
+		return ret;
+
+	if (old_state) {
+		if (ctrl_reg & BD70528_MASK_ELAPSED_TIMER_EN)
+			*old_state |= BD70528_ELAPSED_STATE_BIT;
+		else
+			*old_state &= ~BD70528_ELAPSED_STATE_BIT;
+
+		if ((!enable) == (!(*old_state & BD70528_ELAPSED_STATE_BIT)))
+			return 0;
+	}
+
+	if (enable)
+		ctrl_reg |= BD70528_MASK_ELAPSED_TIMER_EN;
+	else
+		ctrl_reg &= ~BD70528_MASK_ELAPSED_TIMER_EN;
+
+	return regmap_write(bd70528->regmap, BD70528_REG_ELAPSED_TIMER_EN,
+			    ctrl_reg);
+}
+
+static int bd70528_set_rtc_based_timers(struct bd70528_rtc *r, int new_state,
+					int *old_state)
+{
+	int ret;
+
+	ret = bd70528_wdt_set(r->mfd, new_state & BD70528_WDT_STATE_BIT,
+			      old_state);
+	if (ret) {
+		dev_err(r->dev,
+			"Failed to disable WDG for RTC setting (%d)\n", ret);
+		return ret;
+	}
+	ret = bd70528_set_elapsed_tmr(r->mfd,
+				      new_state & BD70528_ELAPSED_STATE_BIT,
+				      old_state);
+	if (ret) {
+		dev_err(r->dev,
+			"Failed to disable 'elapsed timer' for RTC setting\n");
+		return ret;
+	}
+	ret = bd70528_set_wake(r->mfd, new_state & BD70528_WAKE_STATE_BIT,
+			       old_state);
+	if (ret) {
+		dev_err(r->dev,
+			"Failed to disable 'wake timer' for RTC setting\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static int bd70528_re_enable_rtc_based_timers(struct bd70528_rtc *r,
+					      int old_state)
+{
+	return bd70528_set_rtc_based_timers(r, old_state, NULL);
+}
+
+static int bd70528_disable_rtc_based_timers(struct bd70528_rtc *r,
+					    int *old_state)
+{
+	return bd70528_set_rtc_based_timers(r, 0, old_state);
+}
+
+static inline void tmday2rtc(struct rtc_time *t, struct bd70528_rtc_day *d)
+{
+	d->sec &= ~BD70528_MASK_RTC_SEC;
+	d->min &= ~BD70528_MASK_RTC_MINUTE;
+	d->hour &= ~BD70528_MASK_RTC_HOUR;
+	d->sec |= bin2bcd(t->tm_sec);
+	d->min |= bin2bcd(t->tm_min);
+	d->hour |= bin2bcd(t->tm_hour);
+}
+
+static inline void tm2rtc(struct rtc_time *t, struct bd70528_rtc_data *r)
+{
+	r->day &= ~BD70528_MASK_RTC_DAY;
+	r->week &= ~BD70528_MASK_RTC_WEEK;
+	r->month &= ~BD70528_MASK_RTC_MONTH;
+	/*
+	 * PM and 24H bits are not used by Wake - thus we clear them
+	 * here and not in tmday2rtc() which is also used by wake.
+	 */
+	r->time.hour &= ~(BD70528_MASK_RTC_HOUR_PM | BD70528_MASK_RTC_HOUR_24H);
+
+	tmday2rtc(t, &r->time);
+	/*
+	 * We do always set time in 24H mode.
+	 */
+	r->time.hour |= BD70528_MASK_RTC_HOUR_24H;
+	r->day |= bin2bcd(t->tm_mday);
+	r->week |= bin2bcd(t->tm_wday);
+	r->month |= bin2bcd(t->tm_mon + 1);
+	r->year = bin2bcd(t->tm_year - 100);
+}
+
+static inline void rtc2tm(struct bd70528_rtc_data *r, struct rtc_time *t)
+{
+	t->tm_sec = bcd2bin(r->time.sec & BD70528_MASK_RTC_SEC);
+	t->tm_min = bcd2bin(r->time.min & BD70528_MASK_RTC_MINUTE);
+	t->tm_hour = bcd2bin(r->time.hour & BD70528_MASK_RTC_HOUR);
+	/*
+	 * If RTC is in 12H mode, then bit BD70528_MASK_RTC_HOUR_PM
+	 * is not BCD value but tells whether it is AM or PM
+	 */
+	if (!(r->time.hour & BD70528_MASK_RTC_HOUR_24H)) {
+		t->tm_hour %= 12;
+		if (r->time.hour & BD70528_MASK_RTC_HOUR_PM)
+			t->tm_hour += 12;
+	}
+	t->tm_mday = bcd2bin(r->day & BD70528_MASK_RTC_DAY);
+	t->tm_mon = bcd2bin(r->month & BD70528_MASK_RTC_MONTH) - 1;
+	t->tm_year = 100 + bcd2bin(r->year & BD70528_MASK_RTC_YEAR);
+	t->tm_wday = bcd2bin(r->week & BD70528_MASK_RTC_WEEK);
+}
+
+static int bd70528_set_alarm(struct device *dev, struct rtc_wkalrm *a)
+{
+	struct bd70528_rtc_wake wake;
+	struct bd70528_rtc_alm alm;
+	int ret;
+	struct bd70528_rtc *r = dev_get_drvdata(dev);
+	struct rohm_regmap_dev *bd70528 = r->mfd;
+
+	ret = regmap_bulk_read(bd70528->regmap, BD70528_REG_RTC_WAKE_START,
+			       &wake, sizeof(wake));
+	if (ret) {
+		dev_err(dev, "Failed to read wake regs\n");
+		return ret;
+	}
+
+	ret = regmap_bulk_read(bd70528->regmap, BD70528_REG_RTC_ALM_START,
+			       &alm, sizeof(alm));
+	if (ret) {
+		dev_err(dev, "Failed to read alarm regs\n");
+		return ret;
+	}
+
+	tm2rtc(&a->time, &alm.data);
+	tmday2rtc(&a->time, &wake.time);
+
+	if (a->enabled) {
+		alm.alm_mask &= ~BD70528_MASK_ALM_EN;
+		wake.ctrl |= BD70528_MASK_WAKE_EN;
+	} else {
+		alm.alm_mask |= BD70528_MASK_ALM_EN;
+		wake.ctrl &= ~BD70528_MASK_WAKE_EN;
+	}
+
+	ret = regmap_bulk_write(bd70528->regmap,
+				BD70528_REG_RTC_WAKE_START, &wake,
+				sizeof(wake));
+	if (ret) {
+		dev_err(dev, "Failed to set wake time\n");
+		return ret;
+	}
+	ret = regmap_bulk_write(bd70528->regmap, BD70528_REG_RTC_ALM_START,
+				&alm, sizeof(alm));
+	if (ret)
+		dev_err(dev, "Failed to set alarm time\n");
+
+	return ret;
+}
+
+static int bd70528_read_alarm(struct device *dev, struct rtc_wkalrm *a)
+{
+	struct bd70528_rtc_alm alm;
+	int ret;
+	struct bd70528_rtc *r = dev_get_drvdata(dev);
+	struct rohm_regmap_dev *bd70528 = r->mfd;
+
+	ret = regmap_bulk_read(bd70528->regmap, BD70528_REG_RTC_ALM_START,
+			       &alm, sizeof(alm));
+	if (ret) {
+		dev_err(dev, "Failed to read alarm regs\n");
+		return ret;
+	}
+
+	rtc2tm(&alm.data, &a->time);
+	a->time.tm_mday = -1;
+	a->time.tm_mon = -1;
+	a->time.tm_year = -1;
+	a->enabled = !(alm.alm_mask & BD70528_MASK_ALM_EN);
+	a->pending = 0;
+
+	return 0;
+}
+
+static int bd70528_set_time_locked(struct device *dev, struct rtc_time *t)
+{
+	int ret, tmpret, old_states;
+	struct bd70528_rtc_data rtc_data;
+	struct bd70528_rtc *r = dev_get_drvdata(dev);
+	struct rohm_regmap_dev *bd70528 = r->mfd;
+
+	ret = bd70528_disable_rtc_based_timers(r, &old_states);
+	if (ret)
+		return ret;
+
+	tmpret = regmap_bulk_read(bd70528->regmap,
+				  BD70528_REG_RTC_START, &rtc_data,
+				  sizeof(rtc_data));
+	if (tmpret) {
+		dev_err(dev, "Failed to read RTC time registers\n");
+		goto renable_out;
+	}
+	tm2rtc(t, &rtc_data);
+
+	tmpret = regmap_bulk_write(bd70528->regmap,
+				   BD70528_REG_RTC_START, &rtc_data,
+				   sizeof(rtc_data));
+	if (tmpret) {
+		dev_err(dev, "Failed to set RTC time\n");
+		goto renable_out;
+	}
+
+renable_out:
+	ret = bd70528_re_enable_rtc_based_timers(r, old_states);
+	if (tmpret)
+		ret = tmpret;
+
+	return ret;
+}
+
+static int bd70528_set_time(struct device *dev, struct rtc_time *t)
+{
+	int ret;
+	struct bd70528_rtc *r = dev_get_drvdata(dev);
+
+	bd70528_wdt_lock(r->mfd);
+	ret = bd70528_set_time_locked(dev, t);
+	bd70528_wdt_unlock(r->mfd);
+	return ret;
+}
+
+static int bd70528_get_time(struct device *dev, struct rtc_time *t)
+{
+	struct bd70528_rtc *r = dev_get_drvdata(dev);
+	struct rohm_regmap_dev *bd70528 = r->mfd;
+	struct bd70528_rtc_data rtc_data;
+	int ret;
+
+	/* read the RTC date and time registers all at once */
+	ret = regmap_bulk_read(bd70528->regmap,
+			       BD70528_REG_RTC_START, &rtc_data,
+			       sizeof(rtc_data));
+	if (ret) {
+		dev_err(dev, "Failed to read RTC time (err %d)\n", ret);
+		return ret;
+	}
+
+	rtc2tm(&rtc_data, t);
+
+	return 0;
+}
+
+static int bd70528_alm_enable(struct device *dev, unsigned int enabled)
+{
+	int ret;
+	unsigned int enableval = BD70528_MASK_ALM_EN;
+	struct bd70528_rtc *r = dev_get_drvdata(dev);
+
+	if (enabled)
+		enableval = 0;
+
+	bd70528_wdt_lock(r->mfd);
+	ret = bd70528_set_wake(r->mfd, enabled, NULL);
+	if (ret) {
+		dev_err(dev, "Failed to change wake state\n");
+		goto out_unlock;
+	}
+	ret = regmap_update_bits(r->mfd->regmap, BD70528_REG_RTC_ALM_MASK,
+				 BD70528_MASK_ALM_EN, enableval);
+	if (ret)
+		dev_err(dev, "Failed to change alarm state\n");
+
+out_unlock:
+	bd70528_wdt_unlock(r->mfd);
+	return ret;
+}
+
+static const struct rtc_class_ops bd70528_rtc_ops = {
+	.read_time		= bd70528_get_time,
+	.set_time		= bd70528_set_time,
+	.read_alarm		= bd70528_read_alarm,
+	.set_alarm		= bd70528_set_alarm,
+	.alarm_irq_enable	= bd70528_alm_enable,
+};
+
+static irqreturn_t alm_hndlr(int irq, void *data)
+{
+	struct rtc_device *rtc = data;
+
+	rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF | RTC_PF);
+	return IRQ_HANDLED;
+}
+
+static int bd70528_probe(struct platform_device *pdev)
+{
+	struct bd70528_rtc *bd_rtc;
+	struct rohm_regmap_dev *mfd;
+	int ret;
+	struct rtc_device *rtc;
+	int irq;
+	unsigned int hr;
+
+	mfd = dev_get_drvdata(pdev->dev.parent);
+	if (!mfd) {
+		dev_err(&pdev->dev, "No MFD driver data\n");
+		return -EINVAL;
+	}
+	bd_rtc = devm_kzalloc(&pdev->dev, sizeof(*bd_rtc), GFP_KERNEL);
+	if (!bd_rtc)
+		return -ENOMEM;
+
+	bd_rtc->mfd = mfd;
+	bd_rtc->dev = &pdev->dev;
+
+	irq = platform_get_irq_byname(pdev, "bd70528-rtc-alm");
+
+	if (irq < 0) {
+		dev_err(&pdev->dev, "Failed to get irq\n");
+		return irq;
+	}
+
+	platform_set_drvdata(pdev, bd_rtc);
+
+	ret = regmap_read(mfd->regmap, BD70528_REG_RTC_HOUR, &hr);
+
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to reag RTC clock\n");
+		return ret;
+	}
+
+	if (!(hr & BD70528_MASK_RTC_HOUR_24H)) {
+		struct rtc_time t;
+
+		ret = bd70528_get_time(&pdev->dev, &t);
+
+		if (!ret)
+			ret = bd70528_set_time(&pdev->dev, &t);
+
+		if (ret) {
+			dev_err(&pdev->dev,
+				"Setting 24H clock for RTC failed\n");
+			return ret;
+		}
+	}
+
+	device_set_wakeup_capable(&pdev->dev, true);
+	device_wakeup_enable(&pdev->dev);
+
+	rtc = devm_rtc_allocate_device(&pdev->dev);
+	if (IS_ERR(rtc)) {
+		dev_err(&pdev->dev, "RTC device creation failed\n");
+		return PTR_ERR(rtc);
+	}
+
+	rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+	rtc->range_max = RTC_TIMESTAMP_END_2099;
+	rtc->ops = &bd70528_rtc_ops;
+
+	/* Request alarm IRQ prior to registerig the RTC */
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, &alm_hndlr,
+					IRQF_ONESHOT, "bd70528-rtc", rtc);
+	if (ret)
+		return ret;
+
+	/*
+	 *  BD70528 irq controller is not touching the main mask register.
+	 *  So enable the RTC block interrupts at main level. We can just
+	 *  leave them enabled as irq-controller should disable irqs
+	 *  from sub-registers when IRQ is disabled or freed.
+	 */
+	ret = regmap_update_bits(mfd->regmap,
+				 BD70528_REG_INT_MAIN_MASK,
+				 BD70528_INT_RTC_MASK, 0);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to enable RTC interrupts\n");
+		return ret;
+	}
+
+	ret = rtc_register_device(rtc);
+	if (ret)
+		dev_err(&pdev->dev, "Registering RTC failed\n");
+
+	return ret;
+}
+
+static struct platform_driver bd70528_rtc = {
+	.driver = {
+		.name = "bd70528-rtc"
+	},
+	.probe = bd70528_probe,
+};
+
+module_platform_driver(bd70528_rtc);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("BD70528 RTC driver");
+MODULE_LICENSE("GPL");
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH v15 7/7] power: supply: Initial support for ROHM BD70528 PMIC charger block
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
                   ` (5 preceding siblings ...)
  2019-06-03  7:27 ` [PATCH v15 6/7] rtc: bd70528: Initial support for ROHM bd70528 RTC Matti Vaittinen
@ 2019-06-03  7:28 ` Matti Vaittinen
  2019-06-11 20:00 ` [PATCH v15 0/7] support ROHM BD70528 PMIC Sebastian Reichel
  2019-06-27 13:30 ` [GIT PULL] Immutable branch between MFD, Clk, GPIO, Power, Regulator and RTC due for the v5.3 merge window Lee Jones
  8 siblings, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-03  7:28 UTC (permalink / raw)
  To: mazziesaccount, matti.vaittinen
  Cc: Lee Jones, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

ROHM BD70528 PMIC includes battery charger block. Support charger
staus queries and doing few basic settings like input current limit
and charging current.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
Staticized the const array to move it to RO section as suggested by
Sebastian

 drivers/power/supply/Kconfig           |   9 +
 drivers/power/supply/Makefile          |   1 +
 drivers/power/supply/bd70528-charger.c | 743 +++++++++++++++++++++++++
 3 files changed, 753 insertions(+)
 create mode 100644 drivers/power/supply/bd70528-charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index dd7da41f230c..4a3cd679295b 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -689,4 +689,13 @@ config CHARGER_UCS1002
 	  Say Y to enable support for Microchip UCS1002 Programmable
 	  USB Port Power Controller with Charger Emulation.
 
+config CHARGER_BD70528
+	tristate "ROHM bd70528 charger driver"
+	depends on MFD_ROHM_BD70528
+	default n
+	help
+	 Say Y here to enable support for getting battery status
+	 information and altering charger configurations from charger
+	 block of the ROHM BD70528 Power Management IC.
+
 endif # POWER_SUPPLY
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index f208273f9686..346a8ef5f348 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -90,3 +90,4 @@ obj-$(CONFIG_CHARGER_CROS_USBPD)	+= cros_usbpd-charger.o
 obj-$(CONFIG_CHARGER_SC2731)	+= sc2731_charger.o
 obj-$(CONFIG_FUEL_GAUGE_SC27XX)	+= sc27xx_fuel_gauge.o
 obj-$(CONFIG_CHARGER_UCS1002)	+= ucs1002_power.o
+obj-$(CONFIG_CHARGER_BD70528)	+= bd70528-charger.o
diff --git a/drivers/power/supply/bd70528-charger.c b/drivers/power/supply/bd70528-charger.c
new file mode 100644
index 000000000000..1bb32b7226d7
--- /dev/null
+++ b/drivers/power/supply/bd70528-charger.c
@@ -0,0 +1,743 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// Copyright (C) 2018 ROHM Semiconductors
+//
+// power-supply driver for ROHM BD70528 PMIC
+
+/*
+ * BD70528 charger HW state machine.
+ *
+ * The thermal shutdown state is not drawn. From any other state but
+ * battery error and suspend it is possible to go to TSD/TMP states
+ * if temperature is out of bounds.
+ *
+ *  CHG_RST = H
+ *  or CHG_EN=L
+ *  or (DCIN2_UVLO=L && DCIN1_UVLO=L)
+ *  or (DCIN2_OVLO=H & DCIN1_UVKLO=L)
+ *
+ *  +--------------+         +--------------+
+ *  |              |         |              |
+ *  |  Any state   +-------> |    Suspend   |
+ *  |              |         |              |
+ *  +--------------+         +------+-------+
+ *                                  |
+ *  CHG_EN = H && BAT_DET = H &&    |
+ *  No errors (temp, bat_ov, UVLO,  |
+ *  OVLO...)                        |
+ *                                  |
+ *  BAT_OV or             +---------v----------+
+ *  (DBAT && TTRI)        |                    |
+ *      +-----------------+   Trickle Charge   | <---------------+
+ *      |                 |                    |                 |
+ *      |                 +-------+------------+                 |
+ *      |                         |                              |
+ *      |                         |     ^                        |
+ *      |        V_BAT > VTRI_TH  |     |  VBAT < VTRI_TH - 50mV |
+ *      |                         |     |                        |
+ *      |                         v     |                        |
+ *      |                               |                        |
+ *      |     BAT_OV or      +----------+----+                   |
+ *      |     (DBAT && TFST) |               |                   |
+ *      |   +----------------+  Fast Charge  |                   |
+ *      |   |                |               |                   |
+ *      v   v                +----+----------+                   |
+ *                                |                              |
+ *+----------------+   ILIM_DET=L |    ^ ILIM_DET                |
+ *|                |   & CV_DET=H |    | or CV_DET=L             |
+ *|  Battery Error |   & VBAT >   |    | or VBAT < VRECHG_TH     |
+ *|                |   VRECHG_TH  |    | or IBAT  > IFST/x       |
+ *+----------------+   & IBAT <   |    |                         |
+ *                     IFST/x     v    |                         |
+ *       ^                             |                         |
+ *       |                   +---------+-+                       |
+ *       |                   |           |                       |
+ *       +-------------------+  Top OFF  |                       |
+ *  BAT_OV = H or            |           |                       |
+ *  (DBAT && TFST)           +-----+-----+                       |
+ *                                 |                             |
+ *           Stay top-off for 15s  |                             |
+ *                                 v                             |
+ *                                                               |
+ *                            +--------+                         |
+ *                            |        |                         |
+ *                            |  Done  +-------------------------+
+ *                            |        |
+ *                            +--------+   VBAT < VRECHG_TH
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/rohm-bd70528.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#define CHG_STAT_SUSPEND	0x0
+#define CHG_STAT_TRICKLE	0x1
+#define CHG_STAT_FAST		0x3
+#define CHG_STAT_TOPOFF		0xe
+#define CHG_STAT_DONE		0xf
+#define CHG_STAT_OTP_TRICKLE	0x10
+#define CHG_STAT_OTP_FAST	0x11
+#define CHG_STAT_OTP_DONE	0x12
+#define CHG_STAT_TSD_TRICKLE	0x20
+#define CHG_STAT_TSD_FAST	0x21
+#define CHG_STAT_TSD_TOPOFF	0x22
+#define CHG_STAT_BAT_ERR	0x7f
+
+static const char *bd70528_charger_model = "BD70528";
+static const char *bd70528_charger_manufacturer = "ROHM Semiconductors";
+
+#define BD_ERR_IRQ_HND(_name_, _wrn_)					\
+static irqreturn_t bd0528_##_name_##_interrupt(int irq, void *arg)	\
+{									\
+	struct power_supply *psy = (struct power_supply *)arg;		\
+									\
+	power_supply_changed(psy);					\
+	dev_err(&psy->dev, (_wrn_));					\
+									\
+	return IRQ_HANDLED;						\
+}
+
+#define BD_INFO_IRQ_HND(_name_, _wrn_)					\
+static irqreturn_t bd0528_##_name_##_interrupt(int irq, void *arg)	\
+{									\
+	struct power_supply *psy = (struct power_supply *)arg;		\
+									\
+	power_supply_changed(psy);					\
+	dev_dbg(&psy->dev, (_wrn_));					\
+									\
+	return IRQ_HANDLED;						\
+}
+
+#define BD_IRQ_HND(_name_) bd0528_##_name_##_interrupt
+
+struct bd70528_psy {
+	struct regmap *regmap;
+	struct device *dev;
+	struct power_supply *psy;
+};
+
+BD_ERR_IRQ_HND(BAT_OV_DET, "Battery overvoltage detected\n");
+BD_ERR_IRQ_HND(DBAT_DET, "Dead battery detected\n");
+BD_ERR_IRQ_HND(COLD_DET, "Battery cold\n");
+BD_ERR_IRQ_HND(HOT_DET, "Battery hot\n");
+BD_ERR_IRQ_HND(CHG_TSD, "Charger thermal shutdown\n");
+BD_ERR_IRQ_HND(DCIN2_OV_DET, "DCIN2 overvoltage detected\n");
+
+BD_INFO_IRQ_HND(BAT_OV_RES, "Battery voltage back to normal\n");
+BD_INFO_IRQ_HND(COLD_RES, "Battery temperature back to normal\n");
+BD_INFO_IRQ_HND(HOT_RES, "Battery temperature back to normal\n");
+BD_INFO_IRQ_HND(BAT_RMV, "Battery removed\n");
+BD_INFO_IRQ_HND(BAT_DET, "Battery detected\n");
+BD_INFO_IRQ_HND(DCIN2_OV_RES, "DCIN2 voltage back to normal\n");
+BD_INFO_IRQ_HND(DCIN2_RMV, "DCIN2 removed\n");
+BD_INFO_IRQ_HND(DCIN2_DET, "DCIN2 detected\n");
+BD_INFO_IRQ_HND(DCIN1_RMV, "DCIN1 removed\n");
+BD_INFO_IRQ_HND(DCIN1_DET, "DCIN1 detected\n");
+
+struct irq_name_pair {
+	const char *n;
+	irqreturn_t (*h)(int irq, void *arg);
+};
+
+static int bd70528_get_irqs(struct platform_device *pdev,
+			    struct bd70528_psy *bdpsy)
+{
+	int irq, i, ret;
+	unsigned int mask;
+	static const struct irq_name_pair bd70528_chg_irqs[] = {
+		{ .n = "bd70528-bat-ov-res", .h = BD_IRQ_HND(BAT_OV_RES) },
+		{ .n = "bd70528-bat-ov-det", .h = BD_IRQ_HND(BAT_OV_DET) },
+		{ .n = "bd70528-bat-dead", .h = BD_IRQ_HND(DBAT_DET) },
+		{ .n = "bd70528-bat-warmed", .h = BD_IRQ_HND(COLD_RES) },
+		{ .n = "bd70528-bat-cold", .h = BD_IRQ_HND(COLD_DET) },
+		{ .n = "bd70528-bat-cooled", .h = BD_IRQ_HND(HOT_RES) },
+		{ .n = "bd70528-bat-hot", .h = BD_IRQ_HND(HOT_DET) },
+		{ .n = "bd70528-chg-tshd", .h = BD_IRQ_HND(CHG_TSD) },
+		{ .n = "bd70528-bat-removed", .h = BD_IRQ_HND(BAT_RMV) },
+		{ .n = "bd70528-bat-detected", .h = BD_IRQ_HND(BAT_DET) },
+		{ .n = "bd70528-dcin2-ov-res", .h = BD_IRQ_HND(DCIN2_OV_RES) },
+		{ .n = "bd70528-dcin2-ov-det", .h = BD_IRQ_HND(DCIN2_OV_DET) },
+		{ .n = "bd70528-dcin2-removed", .h = BD_IRQ_HND(DCIN2_RMV) },
+		{ .n = "bd70528-dcin2-detected", .h = BD_IRQ_HND(DCIN2_DET) },
+		{ .n = "bd70528-dcin1-removed", .h = BD_IRQ_HND(DCIN1_RMV) },
+		{ .n = "bd70528-dcin1-detected", .h = BD_IRQ_HND(DCIN1_DET) },
+	};
+
+	for (i = 0; i < ARRAY_SIZE(bd70528_chg_irqs); i++) {
+		irq = platform_get_irq_byname(pdev, bd70528_chg_irqs[i].n);
+		if (irq < 0) {
+			dev_err(&pdev->dev, "Bad IRQ information for %s (%d)\n",
+				bd70528_chg_irqs[i].n, irq);
+			return irq;
+		}
+		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+						bd70528_chg_irqs[i].h,
+						IRQF_ONESHOT,
+						bd70528_chg_irqs[i].n,
+						bdpsy->psy);
+
+		if (ret)
+			return ret;
+	}
+	/*
+	 * BD70528 irq controller is not touching the main mask register.
+	 * So enable the charger block interrupts at main level. We can just
+	 * leave them enabled as irq-controller should disable irqs
+	 * from sub-registers when IRQ is disabled or freed.
+	 */
+	mask = BD70528_REG_INT_BAT1_MASK | BD70528_REG_INT_BAT2_MASK;
+	ret = regmap_update_bits(bdpsy->regmap,
+				 BD70528_REG_INT_MAIN_MASK, mask, 0);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to enable charger IRQs\n");
+
+	return ret;
+}
+
+static int bd70528_get_charger_status(struct bd70528_psy *bdpsy, int *val)
+{
+	int ret;
+	unsigned int v;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_CURR_STAT, &v);
+	if (ret) {
+		dev_err(bdpsy->dev, "Charger state read failure %d\n",
+			ret);
+		return ret;
+	}
+
+	switch (v & BD70528_MASK_CHG_STAT) {
+	case CHG_STAT_SUSPEND:
+	/* Maybe we should check the CHG_TTRI_EN? */
+	case CHG_STAT_OTP_TRICKLE:
+	case CHG_STAT_OTP_FAST:
+	case CHG_STAT_OTP_DONE:
+	case CHG_STAT_TSD_TRICKLE:
+	case CHG_STAT_TSD_FAST:
+	case CHG_STAT_TSD_TOPOFF:
+	case CHG_STAT_BAT_ERR:
+		*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+	case CHG_STAT_DONE:
+		*val = POWER_SUPPLY_STATUS_FULL;
+		break;
+	case CHG_STAT_TRICKLE:
+	case CHG_STAT_FAST:
+	case CHG_STAT_TOPOFF:
+		*val = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	default:
+		*val = POWER_SUPPLY_STATUS_UNKNOWN;
+		break;
+	}
+
+	return 0;
+}
+
+static int bd70528_get_charge_type(struct bd70528_psy *bdpsy, int *val)
+{
+	int ret;
+	unsigned int v;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_CURR_STAT, &v);
+	if (ret) {
+		dev_err(bdpsy->dev, "Charger state read failure %d\n",
+			ret);
+		return ret;
+	}
+
+	switch (v & BD70528_MASK_CHG_STAT) {
+	case CHG_STAT_TRICKLE:
+		*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		break;
+	case CHG_STAT_FAST:
+	case CHG_STAT_TOPOFF:
+		*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		break;
+	case CHG_STAT_DONE:
+	case CHG_STAT_SUSPEND:
+	/* Maybe we should check the CHG_TTRI_EN? */
+	case CHG_STAT_OTP_TRICKLE:
+	case CHG_STAT_OTP_FAST:
+	case CHG_STAT_OTP_DONE:
+	case CHG_STAT_TSD_TRICKLE:
+	case CHG_STAT_TSD_FAST:
+	case CHG_STAT_TSD_TOPOFF:
+	case CHG_STAT_BAT_ERR:
+		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	default:
+		*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+		break;
+	}
+
+	return 0;
+}
+
+static int bd70528_get_battery_health(struct bd70528_psy *bdpsy, int *val)
+{
+	int ret;
+	unsigned int v;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_BAT_STAT, &v);
+	if (ret) {
+		dev_err(bdpsy->dev, "Battery state read failure %d\n",
+			ret);
+		return ret;
+	}
+	/* No battery? */
+	if (!(v & BD70528_MASK_CHG_BAT_DETECT))
+		*val = POWER_SUPPLY_HEALTH_DEAD;
+	else if (v & BD70528_MASK_CHG_BAT_OVERVOLT)
+		*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+	else if (v & BD70528_MASK_CHG_BAT_TIMER)
+		*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+	else
+		*val = POWER_SUPPLY_HEALTH_GOOD;
+
+	return 0;
+}
+
+static int bd70528_get_online(struct bd70528_psy *bdpsy, int *val)
+{
+	int ret;
+	unsigned int v;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_IN_STAT, &v);
+	if (ret) {
+		dev_err(bdpsy->dev, "DC1 IN state read failure %d\n",
+			ret);
+		return ret;
+	}
+
+	*val = (v & BD70528_MASK_CHG_DCIN1_UVLO) ? 1 : 0;
+
+	return 0;
+}
+
+static int bd70528_get_present(struct bd70528_psy *bdpsy, int *val)
+{
+	int ret;
+	unsigned int v;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_BAT_STAT, &v);
+	if (ret) {
+		dev_err(bdpsy->dev, "Battery state read failure %d\n",
+			ret);
+		return ret;
+	}
+
+	*val = (v & BD70528_MASK_CHG_BAT_DETECT) ? 1 : 0;
+
+	return 0;
+}
+
+struct linear_range {
+	int min;
+	int step;
+	int vals;
+	int low_sel;
+};
+
+static const struct linear_range current_limit_ranges[] = {
+	{
+		.min = 5,
+		.step = 1,
+		.vals = 36,
+		.low_sel = 0,
+	},
+	{
+		.min = 40,
+		.step = 5,
+		.vals = 5,
+		.low_sel = 0x23,
+	},
+	{
+		.min = 60,
+		.step = 20,
+		.vals = 8,
+		.low_sel = 0x27,
+	},
+	{
+		.min = 200,
+		.step = 50,
+		.vals = 7,
+		.low_sel = 0x2e,
+	}
+};
+
+/*
+ * BD70528 would support setting and getting own charge current/
+ * voltage for low temperatures. The driver currently only reads
+ * the charge current at room temperature. We do set both though.
+ */
+static const struct linear_range warm_charge_curr[] = {
+	{
+		.min = 10,
+		.step = 10,
+		.vals = 20,
+		.low_sel = 0,
+	},
+	{
+		.min = 200,
+		.step = 25,
+		.vals = 13,
+		.low_sel = 0x13,
+	},
+};
+
+/*
+ * Cold charge current selectors are identical to warm charge current
+ * selectors. The difference is that only smaller currents are available
+ * at cold charge range.
+ */
+#define MAX_COLD_CHG_CURR_SEL 0x15
+#define MAX_WARM_CHG_CURR_SEL 0x1f
+#define MIN_CHG_CURR_SEL 0x0
+
+static int find_value_for_selector_low(const struct linear_range *r,
+				       int selectors, unsigned int sel,
+				       unsigned int *val)
+{
+	int i;
+
+	for (i = 0; i < selectors; i++) {
+		if (r[i].low_sel <= sel && r[i].low_sel + r[i].vals >= sel) {
+			*val = r[i].min + (sel - r[i].low_sel) * r[i].step;
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+
+/*
+ * For BD70528 voltage/current limits we happily accept any value which
+ * belongs the range. We could check if value matching the selector is
+ * desired by computing the range min + (sel - sel_low) * range step - but
+ * I guess it is enough if we use voltage/current which is closest (below)
+ * the requested?
+ */
+static int find_selector_for_value_low(const struct linear_range *r,
+				       int selectors, unsigned int val,
+				       unsigned int *sel, bool *found)
+{
+	int i;
+	int ret = -EINVAL;
+
+	*found = false;
+	for (i = 0; i < selectors; i++) {
+		if (r[i].min <= val) {
+			if (r[i].min + r[i].step * r[i].vals >= val) {
+				*found = true;
+				*sel = r[i].low_sel + (val - r[i].min) /
+				       r[i].step;
+				ret = 0;
+				break;
+			}
+			/*
+			 * If the range max is smaller than requested
+			 * we can set the max supported value from range
+			 */
+			*sel = r[i].low_sel + r[i].vals;
+			ret = 0;
+		}
+	}
+	return ret;
+}
+
+static int get_charge_current(struct bd70528_psy *bdpsy, int *ma)
+{
+	unsigned int sel;
+	int ret;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_CHG_CURR_WARM,
+			  &sel);
+	if (ret) {
+		dev_err(bdpsy->dev,
+			"Charge current reading failed (%d)\n", ret);
+		return ret;
+	}
+
+	sel &= BD70528_MASK_CHG_CHG_CURR;
+
+	ret = find_value_for_selector_low(&warm_charge_curr[0],
+					  ARRAY_SIZE(warm_charge_curr), sel,
+					  ma);
+	if (ret) {
+		dev_err(bdpsy->dev,
+			"Unknown charge current value 0x%x\n",
+			sel);
+	}
+
+	return ret;
+}
+
+static int get_current_limit(struct bd70528_psy *bdpsy, int *ma)
+{
+	unsigned int sel;
+	int ret;
+
+	ret = regmap_read(bdpsy->regmap, BD70528_REG_CHG_DCIN_ILIM,
+			  &sel);
+
+	if (ret) {
+		dev_err(bdpsy->dev,
+			"Input current limit reading failed (%d)\n", ret);
+		return ret;
+	}
+
+	sel &= BD70528_MASK_CHG_DCIN_ILIM;
+
+	ret = find_value_for_selector_low(&current_limit_ranges[0],
+					  ARRAY_SIZE(current_limit_ranges), sel,
+					  ma);
+
+	if (ret) {
+		/* Unspecified values mean 500 mA */
+		*ma = 500;
+	}
+	return 0;
+}
+
+static enum power_supply_property bd70528_charger_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static int bd70528_charger_get_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					union power_supply_propval *val)
+{
+	struct bd70528_psy *bdpsy = power_supply_get_drvdata(psy);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return bd70528_get_charger_status(bdpsy, &val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		return bd70528_get_charge_type(bdpsy, &val->intval);
+	case POWER_SUPPLY_PROP_HEALTH:
+		return bd70528_get_battery_health(bdpsy, &val->intval);
+	case POWER_SUPPLY_PROP_PRESENT:
+		return bd70528_get_present(bdpsy, &val->intval);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = get_current_limit(bdpsy, &val->intval);
+		val->intval *= 1000;
+		return ret;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = get_charge_current(bdpsy, &val->intval);
+		val->intval *= 1000;
+		return ret;
+	case POWER_SUPPLY_PROP_ONLINE:
+		return bd70528_get_online(bdpsy, &val->intval);
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = bd70528_charger_model;
+		return 0;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = bd70528_charger_manufacturer;
+		return 0;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static int bd70528_prop_is_writable(struct power_supply *psy,
+				    enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return 1;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int set_charge_current(struct bd70528_psy *bdpsy, int ma)
+{
+	unsigned int reg;
+	int ret = 0, tmpret;
+	bool found;
+
+	if (ma > 500) {
+		dev_warn(bdpsy->dev,
+			 "Requested charge current %u exceed maximum (500mA)\n",
+			 ma);
+		reg = MAX_WARM_CHG_CURR_SEL;
+		goto set;
+	}
+	if (ma < 10) {
+		dev_err(bdpsy->dev,
+			"Requested charge current %u smaller than min (10mA)\n",
+			 ma);
+		reg = MIN_CHG_CURR_SEL;
+		ret = -EINVAL;
+		goto set;
+	}
+
+	ret = find_selector_for_value_low(&warm_charge_curr[0],
+					  ARRAY_SIZE(warm_charge_curr), ma,
+					  &reg, &found);
+	if (ret) {
+		reg = MIN_CHG_CURR_SEL;
+		goto set;
+	}
+	if (!found) {
+		/* There was a gap in supported values and we hit it */
+		dev_warn(bdpsy->dev,
+			 "Unsupported charge current %u mA\n", ma);
+	}
+set:
+
+	tmpret = regmap_update_bits(bdpsy->regmap,
+				    BD70528_REG_CHG_CHG_CURR_WARM,
+				    BD70528_MASK_CHG_CHG_CURR, reg);
+	if (tmpret)
+		dev_err(bdpsy->dev,
+			"Charge current write failure (%d)\n", tmpret);
+
+	if (reg > MAX_COLD_CHG_CURR_SEL)
+		reg = MAX_COLD_CHG_CURR_SEL;
+
+	if (!tmpret)
+		tmpret = regmap_update_bits(bdpsy->regmap,
+					    BD70528_REG_CHG_CHG_CURR_COLD,
+					    BD70528_MASK_CHG_CHG_CURR, reg);
+
+	if (!ret)
+		ret = tmpret;
+
+	return ret;
+}
+
+#define MAX_CURR_LIMIT_SEL 0x34
+#define MIN_CURR_LIMIT_SEL 0x0
+
+static int set_current_limit(struct bd70528_psy *bdpsy, int ma)
+{
+	unsigned int reg;
+	int ret = 0, tmpret;
+	bool found;
+
+	if (ma > 500) {
+		dev_warn(bdpsy->dev,
+			 "Requested current limit %u exceed maximum (500mA)\n",
+			 ma);
+		reg = MAX_CURR_LIMIT_SEL;
+		goto set;
+	}
+	if (ma < 5) {
+		dev_err(bdpsy->dev,
+			"Requested current limit %u smaller than min (5mA)\n",
+			ma);
+		reg = MIN_CURR_LIMIT_SEL;
+		ret = -EINVAL;
+		goto set;
+	}
+
+	ret = find_selector_for_value_low(&current_limit_ranges[0],
+					  ARRAY_SIZE(current_limit_ranges), ma,
+					  &reg, &found);
+	if (ret) {
+		reg = MIN_CURR_LIMIT_SEL;
+		goto set;
+	}
+	if (!found) {
+		/* There was a gap in supported values and we hit it ?*/
+		dev_warn(bdpsy->dev, "Unsupported current limit %umA\n",
+			 ma);
+	}
+
+set:
+	tmpret = regmap_update_bits(bdpsy->regmap,
+				    BD70528_REG_CHG_DCIN_ILIM,
+				    BD70528_MASK_CHG_DCIN_ILIM, reg);
+
+	if (!ret)
+		ret = tmpret;
+
+	return ret;
+}
+
+static int bd70528_charger_set_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					const union power_supply_propval *val)
+{
+	struct bd70528_psy *bdpsy = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return set_current_limit(bdpsy, val->intval / 1000);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return set_charge_current(bdpsy, val->intval / 1000);
+	default:
+		break;
+	}
+	return -EINVAL;
+}
+
+static const struct power_supply_desc bd70528_charger_desc = {
+	.name		= "bd70528-charger",
+	.type		= POWER_SUPPLY_TYPE_MAINS,
+	.properties	= bd70528_charger_props,
+	.num_properties	= ARRAY_SIZE(bd70528_charger_props),
+	.get_property	= bd70528_charger_get_property,
+	.set_property	= bd70528_charger_set_property,
+	.property_is_writeable	= bd70528_prop_is_writable,
+};
+
+static int bd70528_power_probe(struct platform_device *pdev)
+{
+	struct bd70528_psy *bdpsy;
+	struct power_supply_config cfg = {};
+
+	bdpsy = devm_kzalloc(&pdev->dev, sizeof(*bdpsy), GFP_KERNEL);
+	if (!bdpsy)
+		return -ENOMEM;
+
+	bdpsy->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!bdpsy->regmap) {
+		dev_err(&pdev->dev, "No regmap found for chip\n");
+		return -EINVAL;
+	}
+	bdpsy->dev = &pdev->dev;
+
+	platform_set_drvdata(pdev, bdpsy);
+	cfg.drv_data = bdpsy;
+	cfg.of_node = pdev->dev.parent->of_node;
+
+	bdpsy->psy = devm_power_supply_register(&pdev->dev,
+						&bd70528_charger_desc, &cfg);
+	if (IS_ERR(bdpsy->psy)) {
+		dev_err(&pdev->dev, "failed: power supply register\n");
+		return PTR_ERR(bdpsy->psy);
+	}
+
+	return bd70528_get_irqs(pdev, bdpsy);
+}
+
+static struct platform_driver bd70528_power = {
+	.driver = {
+		.name = "bd70528-power"
+	},
+	.probe = bd70528_power_probe,
+};
+
+module_platform_driver(bd70528_power);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("BD70528 power-supply driver");
+MODULE_LICENSE("GPL");
-- 
2.17.2


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH v15 0/7] support ROHM BD70528 PMIC
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
                   ` (6 preceding siblings ...)
  2019-06-03  7:28 ` [PATCH v15 7/7] power: supply: Initial support for ROHM BD70528 PMIC charger block Matti Vaittinen
@ 2019-06-11 20:00 ` Sebastian Reichel
  2019-06-12  6:03   ` Lee Jones
  2019-06-27 13:30 ` [GIT PULL] Immutable branch between MFD, Clk, GPIO, Power, Regulator and RTC due for the v5.3 merge window Lee Jones
  8 siblings, 1 reply; 14+ messages in thread
From: Sebastian Reichel @ 2019-06-11 20:00 UTC (permalink / raw)
  To: Lee Jones
  Cc: mazziesaccount, Lee Jones, Rob Herring, Mark Rutland,
	Michael Turquette, Stephen Boyd, Linus Walleij,
	Bartosz Golaszewski, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

[-- Attachment #1: Type: text/plain, Size: 401 bytes --]

Hi,

On Mon, Jun 03, 2019 at 10:23:37AM +0300, Matti Vaittinen wrote:
> Patch series introducing support for ROHM BD70528 PMIC
> [...]

I think all patches have been reviewed by the respective subsystem
maintainers. Lee, can you provide an immutable branch with the MFD
patches (1, 2, 4)? Looks like the other patches only depend on those
and can go through their respective subsystems.

-- Sebastian

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH v15 0/7] support ROHM BD70528 PMIC
  2019-06-11 20:00 ` [PATCH v15 0/7] support ROHM BD70528 PMIC Sebastian Reichel
@ 2019-06-12  6:03   ` Lee Jones
  2019-06-13  8:35     ` Matti Vaittinen
  2019-06-13 13:05     ` Sebastian Reichel
  0 siblings, 2 replies; 14+ messages in thread
From: Lee Jones @ 2019-06-12  6:03 UTC (permalink / raw)
  To: Sebastian Reichel
  Cc: mazziesaccount, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski, Liam Girdwood,
	Mark Brown, Alessandro Zummo, Alexandre Belloni, devicetree,
	linux-kernel, linux-clk, linux-gpio, linux-pm, linux-rtc

On Tue, 11 Jun 2019, Sebastian Reichel wrote:

> Hi,
> 
> On Mon, Jun 03, 2019 at 10:23:37AM +0300, Matti Vaittinen wrote:
> > Patch series introducing support for ROHM BD70528 PMIC
> > [...]
> 
> I think all patches have been reviewed by the respective subsystem
> maintainers. Lee, can you provide an immutable branch with the MFD
> patches (1, 2, 4)? Looks like the other patches only depend on those
> and can go through their respective subsystems.

Yes.  It's on my TODO list.

Would you prefer this method over me just taking them all and sending
out a PR?  The latter is my usual flow, but I'm happy with either.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH v15 0/7] support ROHM BD70528 PMIC
  2019-06-12  6:03   ` Lee Jones
@ 2019-06-13  8:35     ` Matti Vaittinen
  2019-06-13 13:05     ` Sebastian Reichel
  1 sibling, 0 replies; 14+ messages in thread
From: Matti Vaittinen @ 2019-06-13  8:35 UTC (permalink / raw)
  To: Lee Jones, Vaittinen, Matti
  Cc: Sebastian Reichel, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski, Liam Girdwood,
	Mark Brown, Alessandro Zummo, Alexandre Belloni, devicetree,
	Linux Kernel Mailing List, linux-clk, open list:GPIO SUBSYSTEM,
	Linux PM list, linux-rtc

On Wed, Jun 12, 2019 at 9:03 AM Lee Jones <lee.jones@linaro.org> wrote:
>
> On Tue, 11 Jun 2019, Sebastian Reichel wrote:
>
> > Hi,
> >
> > On Mon, Jun 03, 2019 at 10:23:37AM +0300, Matti Vaittinen wrote:
> > > Patch series introducing support for ROHM BD70528 PMIC
> > > [...]
> >
> > I think all patches have been reviewed by the respective subsystem
> > maintainers. Lee, can you provide an immutable branch with the MFD
> > patches (1, 2, 4)? Looks like the other patches only depend on those
> > and can go through their respective subsystems.
>
> Yes.  It's on my TODO list.
>
> Would you prefer this method over me just taking them all and sending
> out a PR?  The latter is my usual flow, but I'm happy with either.

Thanks guys for taking care of this! :)

--Matti

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH v15 0/7] support ROHM BD70528 PMIC
  2019-06-12  6:03   ` Lee Jones
  2019-06-13  8:35     ` Matti Vaittinen
@ 2019-06-13 13:05     ` Sebastian Reichel
  2019-06-19 14:31       ` Alexandre Belloni
  1 sibling, 1 reply; 14+ messages in thread
From: Sebastian Reichel @ 2019-06-13 13:05 UTC (permalink / raw)
  To: Lee Jones
  Cc: mazziesaccount, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski, Liam Girdwood,
	Mark Brown, Alessandro Zummo, Alexandre Belloni, devicetree,
	linux-kernel, linux-clk, linux-gpio, linux-pm, linux-rtc

[-- Attachment #1: Type: text/plain, Size: 937 bytes --]

Hi,

On Wed, Jun 12, 2019 at 07:03:28AM +0100, Lee Jones wrote:
> On Tue, 11 Jun 2019, Sebastian Reichel wrote:
> > On Mon, Jun 03, 2019 at 10:23:37AM +0300, Matti Vaittinen wrote:
> > > Patch series introducing support for ROHM BD70528 PMIC
> > > [...]
> > 
> > I think all patches have been reviewed by the respective subsystem
> > maintainers. Lee, can you provide an immutable branch with the MFD
> > patches (1, 2, 4)? Looks like the other patches only depend on those
> > and can go through their respective subsystems.
> 
> Yes.  It's on my TODO list.

Thanks.

> Would you prefer this method over me just taking them all and sending
> out a PR?  The latter is my usual flow, but I'm happy with either.

Both methods are fine with me. I usually go with "my" method, since
that results in less shared commits. It simplifies potential
follow-up bug fixes, since there is only one tree to fix.

-- Sebastian

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH v15 0/7] support ROHM BD70528 PMIC
  2019-06-13 13:05     ` Sebastian Reichel
@ 2019-06-19 14:31       ` Alexandre Belloni
  0 siblings, 0 replies; 14+ messages in thread
From: Alexandre Belloni @ 2019-06-19 14:31 UTC (permalink / raw)
  To: Sebastian Reichel
  Cc: Lee Jones, mazziesaccount, Rob Herring, Mark Rutland,
	Michael Turquette, Stephen Boyd, Linus Walleij,
	Bartosz Golaszewski, Liam Girdwood, Mark Brown, Alessandro Zummo,
	devicetree, linux-kernel, linux-clk, linux-gpio, linux-pm,
	linux-rtc

On 13/06/2019 15:05:29+0200, Sebastian Reichel wrote:
> Hi,
> 
> On Wed, Jun 12, 2019 at 07:03:28AM +0100, Lee Jones wrote:
> > On Tue, 11 Jun 2019, Sebastian Reichel wrote:
> > > On Mon, Jun 03, 2019 at 10:23:37AM +0300, Matti Vaittinen wrote:
> > > > Patch series introducing support for ROHM BD70528 PMIC
> > > > [...]
> > > 
> > > I think all patches have been reviewed by the respective subsystem
> > > maintainers. Lee, can you provide an immutable branch with the MFD
> > > patches (1, 2, 4)? Looks like the other patches only depend on those
> > > and can go through their respective subsystems.
> > 
> > Yes.  It's on my TODO list.
> 
> Thanks.
> 
> > Would you prefer this method over me just taking them all and sending
> > out a PR?  The latter is my usual flow, but I'm happy with either.
> 
> Both methods are fine with me. I usually go with "my" method, since
> that results in less shared commits. It simplifies potential
> follow-up bug fixes, since there is only one tree to fix.
> 

Personally, I'm fine with Lee taking everything in his tree as it is
very unlikely to require follow up patches this cycle (i.e before rc1).


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [GIT PULL] Immutable branch between MFD, Clk, GPIO, Power, Regulator and RTC due for the v5.3 merge window
  2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
                   ` (7 preceding siblings ...)
  2019-06-11 20:00 ` [PATCH v15 0/7] support ROHM BD70528 PMIC Sebastian Reichel
@ 2019-06-27 13:30 ` Lee Jones
  8 siblings, 0 replies; 14+ messages in thread
From: Lee Jones @ 2019-06-27 13:30 UTC (permalink / raw)
  To: Matti Vaittinen
  Cc: mazziesaccount, Rob Herring, Mark Rutland, Michael Turquette,
	Stephen Boyd, Linus Walleij, Bartosz Golaszewski,
	Sebastian Reichel, Liam Girdwood, Mark Brown, Alessandro Zummo,
	Alexandre Belloni, devicetree, linux-kernel, linux-clk,
	linux-gpio, linux-pm, linux-rtc

Enjoy!

The following changes since commit a188339ca5a396acc588e5851ed7e19f66b0ebd9:

  Linux 5.2-rc1 (2019-05-19 15:47:09 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-clk-gpio-power-regulator-rtc-v5.3

for you to fetch changes up to f8c7f7ddd8ef0855d06cff5d1cc7713b556006a7:

  power: supply: Initial support for ROHM BD70528 PMIC charger block (2019-06-27 10:57:24 +0100)

----------------------------------------------------------------
Immutable branch between MFD, Clk, GPIO, Power, Regulator and RTC due for the v5.3 merge window

----------------------------------------------------------------
Matti Vaittinen (7):
      mfd: regulator: clk: Split rohm-bd718x7.h
      mfd: bd70528: Support ROHM bd70528 PMIC core
      clk: bd718x7: Support ROHM BD70528 clk block
      dt-bindings: mfd: Document first ROHM BD70528 bindings
      gpio: Initial support for ROHM bd70528 GPIO block
      rtc: bd70528: Initial support for ROHM bd70528 RTC
      power: supply: Initial support for ROHM BD70528 PMIC charger block

 .../devicetree/bindings/mfd/rohm,bd70528-pmic.txt  | 102 +++
 drivers/clk/Kconfig                                |   6 +-
 drivers/clk/clk-bd718x7.c                          |  24 +-
 drivers/gpio/Kconfig                               |  11 +
 drivers/gpio/Makefile                              |   1 +
 drivers/gpio/gpio-bd70528.c                        | 232 +++++++
 drivers/mfd/Kconfig                                |  17 +
 drivers/mfd/Makefile                               |   2 +
 drivers/mfd/rohm-bd70528.c                         | 316 +++++++++
 drivers/mfd/rohm-bd718x7.c                         |  23 +-
 drivers/power/supply/Kconfig                       |   9 +
 drivers/power/supply/Makefile                      |   1 +
 drivers/power/supply/bd70528-charger.c             | 743 +++++++++++++++++++++
 drivers/regulator/bd718x7-regulator.c              |  25 +-
 drivers/rtc/Kconfig                                |   8 +
 drivers/rtc/Makefile                               |   1 +
 drivers/rtc/rtc-bd70528.c                          | 500 ++++++++++++++
 include/linux/mfd/rohm-bd70528.h                   | 408 +++++++++++
 include/linux/mfd/rohm-bd718x7.h                   |  22 +-
 include/linux/mfd/rohm-generic.h                   |  20 +
 20 files changed, 2425 insertions(+), 46 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt
 create mode 100644 drivers/gpio/gpio-bd70528.c
 create mode 100644 drivers/mfd/rohm-bd70528.c
 create mode 100644 drivers/power/supply/bd70528-charger.c
 create mode 100644 drivers/rtc/rtc-bd70528.c
 create mode 100644 include/linux/mfd/rohm-bd70528.h
 create mode 100644 include/linux/mfd/rohm-generic.h

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 14+ messages in thread

end of thread, back to index

Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-06-03  7:23 [PATCH v15 0/7] support ROHM BD70528 PMIC Matti Vaittinen
2019-06-03  7:24 ` [PATCH v15 1/7] mfd: regulator: clk: split rohm-bd718x7.h Matti Vaittinen
2019-06-03  7:25 ` [PATCH v15 2/7] mfd: bd70528: Support ROHM bd70528 PMIC - core Matti Vaittinen
2019-06-03  7:25 ` [PATCH v15 3/7] clk: bd718x7: Support ROHM BD70528 clk block Matti Vaittinen
2019-06-03  7:26 ` [PATCH v15 4/7] dt-bindings: mfd: Document first ROHM BD70528 bindings Matti Vaittinen
2019-06-03  7:26 ` [PATCH v15 5/7] gpio: Initial support for ROHM bd70528 GPIO block Matti Vaittinen
2019-06-03  7:27 ` [PATCH v15 6/7] rtc: bd70528: Initial support for ROHM bd70528 RTC Matti Vaittinen
2019-06-03  7:28 ` [PATCH v15 7/7] power: supply: Initial support for ROHM BD70528 PMIC charger block Matti Vaittinen
2019-06-11 20:00 ` [PATCH v15 0/7] support ROHM BD70528 PMIC Sebastian Reichel
2019-06-12  6:03   ` Lee Jones
2019-06-13  8:35     ` Matti Vaittinen
2019-06-13 13:05     ` Sebastian Reichel
2019-06-19 14:31       ` Alexandre Belloni
2019-06-27 13:30 ` [GIT PULL] Immutable branch between MFD, Clk, GPIO, Power, Regulator and RTC due for the v5.3 merge window Lee Jones

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