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@xxxxxxxxx> --- drivers/mfd/Kconfig | 8 +++ drivers/mfd/Makefile | 1 + drivers/mfd/act8945a.c | 122 ++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/act8945a.h | 25 +++++++++ 4 files changed, 156 insertions(+) create mode 100644 drivers/mfd/act8945a.c create mode 100644 include/linux/mfd/act8945a.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 9581ebb..018c72d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -18,6 +18,14 @@ 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 + bool "Active-semi ACT8945A" + select MFD_CORE + select REGMAP_I2C + depends on I2C && OF + help + Support for the ACT8945A PMIC from Active-Semi + 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..b9b8685 --- /dev/null +++ b/drivers/mfd/act8945a.c @@ -0,0 +1,122 @@ +/* + * MFD driver for Active-semi ACT8945a PMIC + * + * Copyright (C) 2015 Atmel Corporation. + * Wenyou Yang <wenyou.yang@xxxxxxxxx> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/i2c.h> +#include <linux/mfd/act8945a.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-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 *client, + const struct i2c_device_id *id) +{ + struct act8945a_dev *act8945a; + int ret; + + act8945a = devm_kzalloc(&client->dev, sizeof(*act8945a), GFP_KERNEL); + if (act8945a == NULL) + return -ENOMEM; + + i2c_set_clientdata(client, act8945a); + + act8945a->dev = &client->dev; + act8945a->i2c_client = client; + act8945a->regmap = devm_regmap_init_i2c(client, + &act8945a_regmap_config); + if (IS_ERR(act8945a->regmap)) { + ret = PTR_ERR(act8945a->regmap); + dev_err(&client->dev, "regmap init failed: %d\n", ret); + return ret; + } + + ret = mfd_add_devices(act8945a->dev, -1, act8945a_devs, + ARRAY_SIZE(act8945a_devs), NULL, 0, NULL); + if (ret < 0) { + dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret); + return ret; + } + + dev_info(&client->dev, "added %zu mfd sub-devices\n", + ARRAY_SIZE(act8945a_devs)); + + return 0; + +} + +static int act8945a_i2c_remove(struct i2c_client *i2c) +{ + struct act8945a_dev *act8945a = i2c_get_clientdata(i2c); + + mfd_remove_devices(act8945a->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", + .owner = THIS_MODULE, + .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_LICENSE("GPL v2"); +MODULE_AUTHOR("Wenyou Yang <wenyou.yang@xxxxxxxxx>"); diff --git a/include/linux/mfd/act8945a.h b/include/linux/mfd/act8945a.h new file mode 100644 index 0000000..5b18d16 --- /dev/null +++ b/include/linux/mfd/act8945a.h @@ -0,0 +1,25 @@ +/* + * MFD for Active-semi ACT8945A PMIC + * + * Copyright (C) 2015 Atmel Corporation. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _LINUX_MFD_ACT8945A_H +#define _LINUX_MFD_ACT8945A_H + +struct act8945a_dev { + struct device *dev; + struct i2c_client *i2c_client; + struct regmap *regmap; +}; + +#endif -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html