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

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@atmel.com>
+ *
+ * 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@atmel.com>");
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
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