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Commit b25c6b7d authored by Wenyou Yang's avatar Wenyou Yang Committed by Lee Jones
Browse files

mfd: act8945a: Add Active-semi ACT8945A PMIC MFD driver 



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: default avatarWenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: default avatarPeter Korsgaard <peter@korsgaard.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent f4bcf5a2

drivers/mfd/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -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

drivers/mfd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/mfd/act8945a.c

0 → 100644
+102 −0
Original line number Diff line number Diff line 
/*

 * 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>



static const struct mfd_cell act8945a_devs[] = {

	{

		.name = "act8945a-regulator",

	},

	{

		.name = "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)

{

	int ret;

	struct regmap *regmap;



	regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);

	if (IS_ERR(regmap)) {

		ret = PTR_ERR(regmap);

		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);

		return ret;

	}



	i2c_set_clientdata(i2c, regmap);



	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");