forked from luck/tmp_suning_uos_patched
b25c6b7d28
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>
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/*
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* MFD driver for Active-semi ACT8945a PMIC
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*
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* Copyright (C) 2015 Atmel Corporation.
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*
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* Author: Wenyou Yang <wenyou.yang@atmel.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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static const struct mfd_cell act8945a_devs[] = {
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{
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.name = "act8945a-regulator",
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},
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{
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.name = "act8945a-charger",
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},
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};
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static const struct regmap_config act8945a_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int act8945a_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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int ret;
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
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if (IS_ERR(regmap)) {
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ret = PTR_ERR(regmap);
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dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
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return ret;
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}
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i2c_set_clientdata(i2c, regmap);
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ret = mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, act8945a_devs,
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ARRAY_SIZE(act8945a_devs), NULL, 0, NULL);
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if (ret) {
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dev_err(&i2c->dev, "Failed to add sub devices\n");
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return ret;
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}
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return 0;
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}
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static int act8945a_i2c_remove(struct i2c_client *i2c)
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{
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mfd_remove_devices(&i2c->dev);
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return 0;
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}
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static const struct i2c_device_id act8945a_i2c_id[] = {
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{ "act8945a", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
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static const struct of_device_id act8945a_of_match[] = {
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{ .compatible = "active-semi,act8945a", },
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{},
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};
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MODULE_DEVICE_TABLE(of, act8945a_of_match);
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static struct i2c_driver act8945a_i2c_driver = {
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.driver = {
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.name = "act8945a",
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.of_match_table = of_match_ptr(act8945a_of_match),
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},
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.probe = act8945a_i2c_probe,
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.remove = act8945a_i2c_remove,
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.id_table = act8945a_i2c_id,
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};
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static int __init act8945a_i2c_init(void)
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{
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return i2c_add_driver(&act8945a_i2c_driver);
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}
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subsys_initcall(act8945a_i2c_init);
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static void __exit act8945a_i2c_exit(void)
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{
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i2c_del_driver(&act8945a_i2c_driver);
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}
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module_exit(act8945a_i2c_exit);
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MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
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MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
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MODULE_LICENSE("GPL");
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