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

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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>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Wenyou Yang 2016-02-05 11:36:29 +08:00 committed by Lee Jones
parent f4bcf5a29d
commit b25c6b7d28
3 changed files with 114 additions and 0 deletions
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11
drivers/mfd/Kconfig
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@ -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

1
drivers/mfd/Makefile
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@ -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

102
drivers/mfd/act8945a.c Normal file
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@ -0,0 +1,102 @@
/*
* 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");