[PATCH v7 0/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver

[PATCH v7 0/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver

[Wenyou Yang]

This patch set adds support for the Active-semi ACT8945A PMIC
MFD driver. It is a Multi Function Device with the following
subdevices:
 - Regulator
 - Charger

It is interfaced to the host controller using I2C interface,
ACT8945A is a child device of the I2C.

Changes in v7:
 - remove struct act8945a_dev to .c file.
 - remove unused .h file.

Changes in v6:
 - change MFD_ACT8945A type from bool to tristate.
 - revert depends on to 'I2C'.
 - change the regulator name.

Changes in v5:
 - change depends on to 'I2C=y'.

Changes in v4:
 - add a space before .compatible.
 - collect Reviewed-by from Krzysztof Kozlowski.

Changes in v3:
 - fix the tabbing errors in Example.
 - use "pmic@5b" label, not "act8945a@5b" in Example.
 - collect Acked-by from Rob.

Changes in v2:
 - add more help information in Kconfig.
 - update the file header with short version license and author line.
 - remove unused structure members (dev, i2c_client) of stuct act8945a_dev.
 - use define "PLATFORM_DEVID_NONE" for mfd_add_devices(), instead of '-1'.
 - use more explicit info to indicate the failure to add sub devices.
 - remove the unnecessary print out.
 - substitute MODULE_LICENSE("GPL") for MODULE_LICENSE("GPL v2").
 - use more specific label in Example.
 - add pmic and charger nodes in Example.

Wenyou Yang (2):
  mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver
  mfd: add documentation for ACT8945A DT bindings

 Documentation/devicetree/bindings/mfd/act8945a.txt |   82 ++++++++++++++
 drivers/mfd/Kconfig                                |   11 ++
 drivers/mfd/Makefile                               |    1 +
 drivers/mfd/act8945a.c                             |  112 ++++++++++++++++++++
 4 files changed, 206 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/act8945a.txt
 create mode 100644 drivers/mfd/act8945a.c

-- 
1.7.9.5

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[PATCH v7 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver

[Wenyou Yang]

This patch adds support for the Active-semi ACT8945A PMIC.
It is a Multi Function Device with the following subdevices:
 - Regulator
 - Charger

It is interfaced to the host controller using I2C interface,
ACT8945A is a child device of the I2C.

Signed-off-by: Wenyou Yang <wenyou.yang-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
---

Changes in v7:
 - remove struct act8945a_dev to .c file.
 - remove unused .h file.

Changes in v6:
 - change MFD_ACT8945A type from bool to tristate.
 - revert depends on to 'I2C'.

Changes in v5:
 - change depends on to 'I2C=y'.

Changes in v4:
 - add a space before .compatible.
 - collect Reviewed-by from Krzysztof Kozlowski.

Changes in v3: None
Changes in v2:
 - add more help information in Kconfig.
 - update the file header with short version license and author line.
 - remove unused structure members (dev, i2c_client) of stuct act8945a_dev.
 - use define "PLATFORM_DEVID_NONE" for mfd_add_devices(), instead of '-1'.
 - use more explicit info to indicate the failure to add sub devices.
 - remove the unnecessary print out.
 - substitute MODULE_LICENSE("GPL") for MODULE_LICENSE("GPL v2").

 drivers/mfd/Kconfig    |   11 +++++
 drivers/mfd/Makefile   |    1 +
 drivers/mfd/act8945a.c |  112 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 124 insertions(+)
 create mode 100644 drivers/mfd/act8945a.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 9ca66de..5038e78 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -18,6 +18,17 @@ config MFD_CS5535
 	  This is the core driver for CS5535/CS5536 MFD functions.  This is
           necessary for using the board's GPIO and MFGPT functionality.
 
+config MFD_ACT8945A
+	tristate "Active-semi ACT8945A"
+	select MFD_CORE
+	select REGMAP_I2C
+	depends on I2C && OF
+	help
+	  Support for the ACT8945A PMIC from Active-semi. This device
+	  features three step-down DC/DC converters and four low-dropout
+	  linear regulators, along with a complete ActivePath battery
+	  charger.
+
 config MFD_AS3711
 	bool "AMS AS3711"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 0f230a6..2f1ca82 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -6,6 +6,7 @@
 obj-$(CONFIG_MFD_88PM860X)	+= 88pm860x.o
 obj-$(CONFIG_MFD_88PM800)	+= 88pm800.o 88pm80x.o
 obj-$(CONFIG_MFD_88PM805)	+= 88pm805.o 88pm80x.o
+obj-$(CONFIG_MFD_ACT8945A)	+= act8945a.o
 obj-$(CONFIG_MFD_SM501)		+= sm501.o
 obj-$(CONFIG_MFD_ASIC3)		+= asic3.o tmio_core.o
 obj-$(CONFIG_MFD_BCM590XX)	+= bcm590xx.o
diff --git a/drivers/mfd/act8945a.c b/drivers/mfd/act8945a.c
new file mode 100644
index 0000000..d2e01941
--- /dev/null
+++ b/drivers/mfd/act8945a.c
@@ -0,0 +1,112 @@
+/*
+ * MFD driver for Active-semi ACT8945a PMIC
+ *
+ * Copyright (C) 2015 Atmel Corporation.
+ *
+ * Author: Wenyou Yang <wenyou.yang-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under  the terms of the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+struct act8945a_dev {
+	struct regmap *regmap;
+};
+
+static const struct mfd_cell act8945a_devs[] = {
+	{
+		.name = "act8945a-pmic",
+		.of_compatible = "active-semi,act8945a-regulator",
+	},
+	{
+		.name = "act8945a-charger",
+		.of_compatible = "active-semi,act8945a-charger",
+	},
+};
+
+static const struct regmap_config act8945a_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int act8945a_i2c_probe(struct i2c_client *i2c,
+			      const struct i2c_device_id *id)
+{
+	struct act8945a_dev *act8945a;
+	int ret;
+
+	act8945a = devm_kzalloc(&i2c->dev, sizeof(*act8945a), GFP_KERNEL);
+	if (!act8945a)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, act8945a);
+
+	act8945a->regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
+	if (IS_ERR(act8945a->regmap)) {
+		ret = PTR_ERR(act8945a->regmap);
+		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, act8945a_devs,
+			      ARRAY_SIZE(act8945a_devs), NULL, 0, NULL);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to add sub devices\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int act8945a_i2c_remove(struct i2c_client *i2c)
+{
+	mfd_remove_devices(&i2c->dev);
+
+	return 0;
+}
+
+static const struct i2c_device_id act8945a_i2c_id[] = {
+	{ "act8945a", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
+
+static const struct of_device_id act8945a_of_match[] = {
+	{ .compatible = "active-semi,act8945a", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, act8945a_of_match);
+
+static struct i2c_driver act8945a_i2c_driver = {
+	.driver = {
+		   .name = "act8945a",
+		   .of_match_table = of_match_ptr(act8945a_of_match),
+	},
+	.probe = act8945a_i2c_probe,
+	.remove = act8945a_i2c_remove,
+	.id_table = act8945a_i2c_id,
+};
+
+static int __init act8945a_i2c_init(void)
+{
+	return i2c_add_driver(&act8945a_i2c_driver);
+}
+subsys_initcall(act8945a_i2c_init);
+
+static void __exit act8945a_i2c_exit(void)
+{
+	i2c_del_driver(&act8945a_i2c_driver);
+}
+module_exit(act8945a_i2c_exit);
+
+MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
+MODULE_AUTHOR("Wenyou Yang <wenyou.yang-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>");
+MODULE_LICENSE("GPL");
-- 
1.7.9.5

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Re: [PATCH v7 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver

[Lee Jones]

On Fri, 22 Jan 2016, Wenyou Yang wrote:

> This patch adds support for the Active-semi ACT8945A PMIC.
> It is a Multi Function Device with the following subdevices:
>  - Regulator
>  - Charger
> 
> It is interfaced to the host controller using I2C interface,
> ACT8945A is a child device of the I2C.
> 
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> ---
> 
> Changes in v7:
>  - remove struct act8945a_dev to .c file.
>  - remove unused .h file.
> 
> Changes in v6:
>  - change MFD_ACT8945A type from bool to tristate.
>  - revert depends on to 'I2C'.
> 
> Changes in v5:
>  - change depends on to 'I2C=y'.
> 
> Changes in v4:
>  - add a space before .compatible.
>  - collect Reviewed-by from Krzysztof Kozlowski.
> 
> Changes in v3: None
> Changes in v2:
>  - add more help information in Kconfig.
>  - update the file header with short version license and author line.
>  - remove unused structure members (dev, i2c_client) of stuct act8945a_dev.
>  - use define "PLATFORM_DEVID_NONE" for mfd_add_devices(), instead of '-1'.
>  - use more explicit info to indicate the failure to add sub devices.
>  - remove the unnecessary print out.
>  - substitute MODULE_LICENSE("GPL") for MODULE_LICENSE("GPL v2").
> 
>  drivers/mfd/Kconfig    |   11 +++++
>  drivers/mfd/Makefile   |    1 +
>  drivers/mfd/act8945a.c |  112 ++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 124 insertions(+)
>  create mode 100644 drivers/mfd/act8945a.c
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 9ca66de..5038e78 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -18,6 +18,17 @@ config MFD_CS5535
>  	  This is the core driver for CS5535/CS5536 MFD functions.  This is
>            necessary for using the board's GPIO and MFGPT functionality.
>  
> +config MFD_ACT8945A
> +	tristate "Active-semi ACT8945A"
> +	select MFD_CORE
> +	select REGMAP_I2C
> +	depends on I2C && OF
> +	help
> +	  Support for the ACT8945A PMIC from Active-semi. This device
> +	  features three step-down DC/DC converters and four low-dropout
> +	  linear regulators, along with a complete ActivePath battery
> +	  charger.
> +
>  config MFD_AS3711
>  	bool "AMS AS3711"
>  	select MFD_CORE
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 0f230a6..2f1ca82 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -6,6 +6,7 @@
>  obj-$(CONFIG_MFD_88PM860X)	+= 88pm860x.o
>  obj-$(CONFIG_MFD_88PM800)	+= 88pm800.o 88pm80x.o
>  obj-$(CONFIG_MFD_88PM805)	+= 88pm805.o 88pm80x.o
> +obj-$(CONFIG_MFD_ACT8945A)	+= act8945a.o
>  obj-$(CONFIG_MFD_SM501)		+= sm501.o
>  obj-$(CONFIG_MFD_ASIC3)		+= asic3.o tmio_core.o
>  obj-$(CONFIG_MFD_BCM590XX)	+= bcm590xx.o
> diff --git a/drivers/mfd/act8945a.c b/drivers/mfd/act8945a.c
> new file mode 100644
> index 0000000..d2e01941
> --- /dev/null
> +++ b/drivers/mfd/act8945a.c
> @@ -0,0 +1,112 @@
> +/*
> + * MFD driver for Active-semi ACT8945a PMIC
> + *
> + * Copyright (C) 2015 Atmel Corporation.
> + *
> + * Author: Wenyou Yang <wenyou.yang@atmel.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under  the terms of the GNU General  Public License as published by the
> + * Free Software Foundation;  either version 2 of the License, or (at your
> + * option) any later version.
> + */
> +
> +#include <linux/i2c.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +
> +struct act8945a_dev {
> +	struct regmap *regmap;
> +};
> +
> +static const struct mfd_cell act8945a_devs[] = {
> +	{
> +		.name = "act8945a-pmic",

I think this should be -regulator, rather than -pmic.

I believe *this* is the PMIC driver.

> +		.of_compatible = "active-semi,act8945a-regulator",
> +	},
> +	{
> +		.name = "act8945a-charger",
> +		.of_compatible = "active-semi,act8945a-charger",
> +	},
> +};
> +
> +static const struct regmap_config act8945a_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +};
> +
> +static int act8945a_i2c_probe(struct i2c_client *i2c,
> +			      const struct i2c_device_id *id)
> +{
> +	struct act8945a_dev *act8945a;
> +	int ret;
> +
> +	act8945a = devm_kzalloc(&i2c->dev, sizeof(*act8945a), GFP_KERNEL);
> +	if (!act8945a)
> +		return -ENOMEM;
> +
> +	i2c_set_clientdata(i2c, act8945a);
> +
> +	act8945a->regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
> +	if (IS_ERR(act8945a->regmap)) {
> +		ret = PTR_ERR(act8945a->regmap);
> +		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
> +		return ret;
> +	}

Is the Regmap used in both the charger AND regulator drivers?

> +	ret = mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, act8945a_devs,
> +			      ARRAY_SIZE(act8945a_devs), NULL, 0, NULL);
> +	if (ret) {
> +		dev_err(&i2c->dev, "Failed to add sub devices\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int act8945a_i2c_remove(struct i2c_client *i2c)
> +{
> +	mfd_remove_devices(&i2c->dev);
> +
> +	return 0;
> +}
> +
> +static const struct i2c_device_id act8945a_i2c_id[] = {
> +	{ "act8945a", 0 },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
> +
> +static const struct of_device_id act8945a_of_match[] = {
> +	{ .compatible = "active-semi,act8945a", },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, act8945a_of_match);
> +
> +static struct i2c_driver act8945a_i2c_driver = {
> +	.driver = {
> +		   .name = "act8945a",
> +		   .of_match_table = of_match_ptr(act8945a_of_match),
> +	},
> +	.probe = act8945a_i2c_probe,
> +	.remove = act8945a_i2c_remove,
> +	.id_table = act8945a_i2c_id,
> +};
> +
> +static int __init act8945a_i2c_init(void)
> +{
> +	return i2c_add_driver(&act8945a_i2c_driver);
> +}
> +subsys_initcall(act8945a_i2c_init);
> +
> +static void __exit act8945a_i2c_exit(void)
> +{
> +	i2c_del_driver(&act8945a_i2c_driver);
> +}
> +module_exit(act8945a_i2c_exit);
> +
> +MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
> +MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
> +MODULE_LICENSE("GPL");

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

RE: [PATCH v7 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver

[Yang, Wenyou]

Hi Lee,

Thank you for your review.


> -----Original Message-----
> From: Lee Jones [mailto:lee.jones@linaro.org]
> Sent: 2016年1月25日 20:50
> To: Yang, Wenyou <Wenyou.Yang@atmel.com>
> Cc: Rob Herring <robh+dt@kernel.org>; Pawel Moll <pawel.moll@arm.com>;
> Mark Rutland <mark.rutland@arm.com>; Ian Campbell
> <ijc+devicetree@hellion.org.uk>; Kumar Gala <galak@codeaurora.org>; Javier
> Martinez Canillas <javier@dowhile0.org>; Krzysztof Kozlowski
> <k.kozlowski@samsung.com>; Peter Korsgaard <jacmet@gmail.com>; Ferre,
> Nicolas <Nicolas.FERRE@atmel.com>; linux-arm-kernel@lists.infradead.org;
> linux-kernel@vger.kernel.org; devicetree@vger.kernel.org
> Subject: Re: [PATCH v7 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC
> MFD driver
> 
> On Fri, 22 Jan 2016, Wenyou Yang wrote:
> 
> > This patch adds support for the Active-semi ACT8945A PMIC.
> > It is a Multi Function Device with the following subdevices:
> >  - Regulator
> >  - Charger
> >
> > It is interfaced to the host controller using I2C interface, ACT8945A
> > is a child device of the I2C.
> >
> > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> > Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> > ---
> >
> > Changes in v7:
> >  - remove struct act8945a_dev to .c file.
> >  - remove unused .h file.
> >
> > Changes in v6:
> >  - change MFD_ACT8945A type from bool to tristate.
> >  - revert depends on to 'I2C'.
> >
> > Changes in v5:
> >  - change depends on to 'I2C=y'.
> >
> > Changes in v4:
> >  - add a space before .compatible.
> >  - collect Reviewed-by from Krzysztof Kozlowski.
> >
> > Changes in v3: None
> > Changes in v2:
> >  - add more help information in Kconfig.
> >  - update the file header with short version license and author line.
> >  - remove unused structure members (dev, i2c_client) of stuct act8945a_dev.
> >  - use define "PLATFORM_DEVID_NONE" for mfd_add_devices(), instead of '-1'.
> >  - use more explicit info to indicate the failure to add sub devices.
> >  - remove the unnecessary print out.
> >  - substitute MODULE_LICENSE("GPL") for MODULE_LICENSE("GPL v2").
> >
> >  drivers/mfd/Kconfig    |   11 +++++
> >  drivers/mfd/Makefile   |    1 +
> >  drivers/mfd/act8945a.c |  112
> > ++++++++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 124 insertions(+)
> >  create mode 100644 drivers/mfd/act8945a.c
> >
> > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index
> > 9ca66de..5038e78 100644
> > --- a/drivers/mfd/Kconfig
> > +++ b/drivers/mfd/Kconfig
> > @@ -18,6 +18,17 @@ config MFD_CS5535
> >  	  This is the core driver for CS5535/CS5536 MFD functions.  This is
> >            necessary for using the board's GPIO and MFGPT functionality.
> >
> > +config MFD_ACT8945A
> > +	tristate "Active-semi ACT8945A"
> > +	select MFD_CORE
> > +	select REGMAP_I2C
> > +	depends on I2C && OF
> > +	help
> > +	  Support for the ACT8945A PMIC from Active-semi. This device
> > +	  features three step-down DC/DC converters and four low-dropout
> > +	  linear regulators, along with a complete ActivePath battery
> > +	  charger.
> > +
> >  config MFD_AS3711
> >  	bool "AMS AS3711"
> >  	select MFD_CORE
> > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index
> > 0f230a6..2f1ca82 100644
> > --- a/drivers/mfd/Makefile
> > +++ b/drivers/mfd/Makefile
> > @@ -6,6 +6,7 @@
> >  obj-$(CONFIG_MFD_88PM860X)	+= 88pm860x.o
> >  obj-$(CONFIG_MFD_88PM800)	+= 88pm800.o 88pm80x.o
> >  obj-$(CONFIG_MFD_88PM805)	+= 88pm805.o 88pm80x.o
> > +obj-$(CONFIG_MFD_ACT8945A)	+= act8945a.o
> >  obj-$(CONFIG_MFD_SM501)		+= sm501.o
> >  obj-$(CONFIG_MFD_ASIC3)		+= asic3.o tmio_core.o
> >  obj-$(CONFIG_MFD_BCM590XX)	+= bcm590xx.o
> > diff --git a/drivers/mfd/act8945a.c b/drivers/mfd/act8945a.c new file
> > mode 100644 index 0000000..d2e01941
> > --- /dev/null
> > +++ b/drivers/mfd/act8945a.c
> > @@ -0,0 +1,112 @@
> > +/*
> > + * MFD driver for Active-semi ACT8945a PMIC
> > + *
> > + * Copyright (C) 2015 Atmel Corporation.
> > + *
> > + * Author: Wenyou Yang <wenyou.yang@atmel.com>
> > + *
> > + * This program is free software; you can redistribute it and/or
> > +modify it
> > + * under  the terms of the GNU General  Public License as published
> > +by the
> > + * Free Software Foundation;  either version 2 of the License, or (at
> > +your
> > + * option) any later version.
> > + */
> > +
> > +#include <linux/i2c.h>
> > +#include <linux/mfd/core.h>
> > +#include <linux/module.h>
> > +#include <linux/of_device.h>
> > +#include <linux/regmap.h>
> > +
> > +struct act8945a_dev {
> > +	struct regmap *regmap;
> > +};
> > +
> > +static const struct mfd_cell act8945a_devs[] = {
> > +	{
> > +		.name = "act8945a-pmic",
> 
> I think this should be -regulator, rather than -pmic.

Yes, -regulator is better.

> 
> I believe *this* is the PMIC driver.
> 
> > +		.of_compatible = "active-semi,act8945a-regulator",
> > +	},
> > +	{
> > +		.name = "act8945a-charger",
> > +		.of_compatible = "active-semi,act8945a-charger",
> > +	},
> > +};
> > +
> > +static const struct regmap_config act8945a_regmap_config = {
> > +	.reg_bits = 8,
> > +	.val_bits = 8,
> > +};
> > +
> > +static int act8945a_i2c_probe(struct i2c_client *i2c,
> > +			      const struct i2c_device_id *id) {
> > +	struct act8945a_dev *act8945a;
> > +	int ret;
> > +
> > +	act8945a = devm_kzalloc(&i2c->dev, sizeof(*act8945a), GFP_KERNEL);
> > +	if (!act8945a)
> > +		return -ENOMEM;
> > +
> > +	i2c_set_clientdata(i2c, act8945a);
> > +
> > +	act8945a->regmap = devm_regmap_init_i2c(i2c,
> &act8945a_regmap_config);
> > +	if (IS_ERR(act8945a->regmap)) {
> > +		ret = PTR_ERR(act8945a->regmap);
> > +		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
> > +		return ret;
> > +	}
> 
> Is the Regmap used in both the charger AND regulator drivers?

Yes, used in both drivers. 

The regmap is got through dev_get_regmap(pdev->dev.parent, NULL).

> 
> > +	ret = mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
> act8945a_devs,
> > +			      ARRAY_SIZE(act8945a_devs), NULL, 0, NULL);
> > +	if (ret) {
> > +		dev_err(&i2c->dev, "Failed to add sub devices\n");
> > +		return ret;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int act8945a_i2c_remove(struct i2c_client *i2c) {
> > +	mfd_remove_devices(&i2c->dev);
> > +
> > +	return 0;
> > +}
> > +
> > +static const struct i2c_device_id act8945a_i2c_id[] = {
> > +	{ "act8945a", 0 },
> > +	{}
> > +};
> > +MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
> > +
> > +static const struct of_device_id act8945a_of_match[] = {
> > +	{ .compatible = "active-semi,act8945a", },
> > +	{},
> > +};
> > +MODULE_DEVICE_TABLE(of, act8945a_of_match);
> > +
> > +static struct i2c_driver act8945a_i2c_driver = {
> > +	.driver = {
> > +		   .name = "act8945a",
> > +		   .of_match_table = of_match_ptr(act8945a_of_match),
> > +	},
> > +	.probe = act8945a_i2c_probe,
> > +	.remove = act8945a_i2c_remove,
> > +	.id_table = act8945a_i2c_id,
> > +};
> > +
> > +static int __init act8945a_i2c_init(void) {
> > +	return i2c_add_driver(&act8945a_i2c_driver);
> > +}
> > +subsys_initcall(act8945a_i2c_init);
> > +
> > +static void __exit act8945a_i2c_exit(void) {
> > +	i2c_del_driver(&act8945a_i2c_driver);
> > +}
> > +module_exit(act8945a_i2c_exit);
> > +
> > +MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
> > +MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
> > +MODULE_LICENSE("GPL");
> 
> --
> Lee Jones
> Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source
> software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog


Best Regards,
Wenyou Yang

[PATCH v7 2/2] mfd: add documentation for ACT8945A DT bindings

[Wenyou Yang]

The Active-semi ACT8945A PMIC is a Multi-Function Device, it has
two subdevices:
 - Regulator
 - Charger

This patch adds documentation for ACT8945A DT bindings.

Signed-off-by: Wenyou Yang <wenyou.yang-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---

Changes in v7: None
Changes in v6:
 - change the regulator name.

Changes in v5: None
Changes in v4: None
Changes in v3:
 - fix the tabbing errors in Example.
 - use "pmic@5b" label, not "act8945a@5b" in Example.
 - collect Acked-by from Rob.

Changes in v2:
 - use more specific label in Example.
 - add pmic and charger nodes in Example.

 Documentation/devicetree/bindings/mfd/act8945a.txt |   82 ++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/act8945a.txt

diff --git a/Documentation/devicetree/bindings/mfd/act8945a.txt b/Documentation/devicetree/bindings/mfd/act8945a.txt
new file mode 100644
index 0000000..f2a8387
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/act8945a.txt
@@ -0,0 +1,82 @@
+Device-Tree bindings for Active-semi ACT8945A MFD driver
+
+Required properties:
+ - compatible: "active-semi,act8945a".
+ - reg: the I2C slave address for the ACT8945A chip
+
+The chip exposes two subdevices:
+ - a regulators: see ../regulator/act8945a-regulator.txt
+ - a charger: see ../power/act8945a-charger.txt
+
+Example:
+	pmic@5b {
+		compatible = "active-semi,act8945a";
+		reg = <0x5b>;
+		status = "okay";
+
+		pmic {
+			compatible = "active-semi,act8945a-regulator";
+			active-semi,vsel-high;
+
+			regulators {
+				vdd_1v35_reg: REG_DCDC1 {
+					regulator-name = "VDD_1V35";
+					regulator-min-microvolt = <1350000>;
+					regulator-max-microvolt = <1350000>;
+					regulator-always-on;
+				};
+
+				vdd_1v2_reg: REG_DCDC2 {
+					regulator-name = "VDD_1V2";
+					regulator-min-microvolt = <1100000>;
+					regulator-max-microvolt = <1300000>;
+					regulator-always-on;
+				};
+
+				vdd_3v3_reg: REG_DCDC3 {
+					regulator-name = "VDD_3V3";
+					regulator-min-microvolt = <3300000>;
+					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
+				};
+
+				vdd_fuse_reg: REG_LDO1 {
+					regulator-name = "VDD_FUSE";
+					regulator-min-microvolt = <2500000>;
+					regulator-max-microvolt = <2500000>;
+					regulator-always-on;
+				};
+
+				vdd_3v3_lp_reg: REG_LDO2 {
+					regulator-name = "VDD_3V3_LP";
+					regulator-min-microvolt = <3300000>;
+					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
+				};
+
+				vdd_led_reg: REG_LDO3 {
+					regulator-name = "VDD_LED";
+					regulator-min-microvolt = <3300000>;
+					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
+				};
+
+				vdd_sdhc_1v8_reg: REG_LDO4 {
+					regulator-name = "VDD_SDHC_1V8";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-always-on;
+				};
+			};
+		};
+
+		charger {
+			compatible = "active-semi,act8945a-charger";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_charger_chglev>;
+			active-semi,chglev-gpio = <&pioA 12 GPIO_ACTIVE_HIGH>;
+			active-semi,input_voltage_threshold = <6600>;
+			active-semi,precondition_timeout = <40>;
+			active-semi,total_timeout = <3>;
+		};
+	};
-- 
1.7.9.5

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Re: [PATCH v7 2/2] mfd: add documentation for ACT8945A DT bindings

[Lee Jones]

On Fri, 22 Jan 2016, Wenyou Yang wrote:

> The Active-semi ACT8945A PMIC is a Multi-Function Device, it has
> two subdevices:
>  - Regulator
>  - Charger
> 
> This patch adds documentation for ACT8945A DT bindings.
> 
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> Acked-by: Rob Herring <robh@kernel.org>

Acked-by: Lee Jones <lee.jones@linaro.org>

> ---
> 
> Changes in v7: None
> Changes in v6:
>  - change the regulator name.
> 
> Changes in v5: None
> Changes in v4: None
> Changes in v3:
>  - fix the tabbing errors in Example.
>  - use "pmic@5b" label, not "act8945a@5b" in Example.
>  - collect Acked-by from Rob.
> 
> Changes in v2:
>  - use more specific label in Example.
>  - add pmic and charger nodes in Example.
> 
>  Documentation/devicetree/bindings/mfd/act8945a.txt |   82 ++++++++++++++++++++
>  1 file changed, 82 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/act8945a.txt
> 
> diff --git a/Documentation/devicetree/bindings/mfd/act8945a.txt b/Documentation/devicetree/bindings/mfd/act8945a.txt
> new file mode 100644
> index 0000000..f2a8387
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/act8945a.txt
> @@ -0,0 +1,82 @@
> +Device-Tree bindings for Active-semi ACT8945A MFD driver
> +
> +Required properties:
> + - compatible: "active-semi,act8945a".
> + - reg: the I2C slave address for the ACT8945A chip
> +
> +The chip exposes two subdevices:
> + - a regulators: see ../regulator/act8945a-regulator.txt
> + - a charger: see ../power/act8945a-charger.txt
> +
> +Example:
> +	pmic@5b {
> +		compatible = "active-semi,act8945a";
> +		reg = <0x5b>;
> +		status = "okay";
> +
> +		pmic {
> +			compatible = "active-semi,act8945a-regulator";
> +			active-semi,vsel-high;
> +
> +			regulators {
> +				vdd_1v35_reg: REG_DCDC1 {
> +					regulator-name = "VDD_1V35";
> +					regulator-min-microvolt = <1350000>;
> +					regulator-max-microvolt = <1350000>;
> +					regulator-always-on;
> +				};
> +
> +				vdd_1v2_reg: REG_DCDC2 {
> +					regulator-name = "VDD_1V2";
> +					regulator-min-microvolt = <1100000>;
> +					regulator-max-microvolt = <1300000>;
> +					regulator-always-on;
> +				};
> +
> +				vdd_3v3_reg: REG_DCDC3 {
> +					regulator-name = "VDD_3V3";
> +					regulator-min-microvolt = <3300000>;
> +					regulator-max-microvolt = <3300000>;
> +					regulator-always-on;
> +				};
> +
> +				vdd_fuse_reg: REG_LDO1 {
> +					regulator-name = "VDD_FUSE";
> +					regulator-min-microvolt = <2500000>;
> +					regulator-max-microvolt = <2500000>;
> +					regulator-always-on;
> +				};
> +
> +				vdd_3v3_lp_reg: REG_LDO2 {
> +					regulator-name = "VDD_3V3_LP";
> +					regulator-min-microvolt = <3300000>;
> +					regulator-max-microvolt = <3300000>;
> +					regulator-always-on;
> +				};
> +
> +				vdd_led_reg: REG_LDO3 {
> +					regulator-name = "VDD_LED";
> +					regulator-min-microvolt = <3300000>;
> +					regulator-max-microvolt = <3300000>;
> +					regulator-always-on;
> +				};
> +
> +				vdd_sdhc_1v8_reg: REG_LDO4 {
> +					regulator-name = "VDD_SDHC_1V8";
> +					regulator-min-microvolt = <1800000>;
> +					regulator-max-microvolt = <1800000>;
> +					regulator-always-on;
> +				};
> +			};
> +		};
> +
> +		charger {
> +			compatible = "active-semi,act8945a-charger";
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&pinctrl_charger_chglev>;
> +			active-semi,chglev-gpio = <&pioA 12 GPIO_ACTIVE_HIGH>;
> +			active-semi,input_voltage_threshold = <6600>;
> +			active-semi,precondition_timeout = <40>;
> +			active-semi,total_timeout = <3>;
> +		};
> +	};

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog