mfd: Split 88pm8607 driver
Create 88pm8607-i2c driver to support all I2C operation of 88PM8607.
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/88pm860x-i2c.c b/drivers/mfd/88pm860x-i2c.c
new file mode 100644
index 0000000..dda23cb
--- /dev/null
+++ b/drivers/mfd/88pm860x-i2c.c
@@ -0,0 +1,202 @@
+/*
+ * I2C driver for Marvell 88PM8607
+ *
+ * Copyright (C) 2009 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhuang@marvell.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/mfd/88pm8607.h>
+
+static inline int pm8607_read_device(struct pm8607_chip *chip,
+ int reg, int bytes, void *dest)
+{
+ struct i2c_client *i2c = chip->client;
+ unsigned char data;
+ int ret;
+
+ data = (unsigned char)reg;
+ ret = i2c_master_send(i2c, &data, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_master_recv(i2c, dest, bytes);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static inline int pm8607_write_device(struct pm8607_chip *chip,
+ int reg, int bytes, void *src)
+{
+ struct i2c_client *i2c = chip->client;
+ unsigned char buf[bytes + 1];
+ int ret;
+
+ buf[0] = (unsigned char)reg;
+ memcpy(&buf[1], src, bytes);
+
+ ret = i2c_master_send(i2c, buf, bytes + 1);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+int pm8607_reg_read(struct pm8607_chip *chip, int reg)
+{
+ unsigned char data;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ ret = chip->read(chip, reg, 1, &data);
+ mutex_unlock(&chip->io_lock);
+
+ if (ret < 0)
+ return ret;
+ else
+ return (int)data;
+}
+EXPORT_SYMBOL(pm8607_reg_read);
+
+int pm8607_reg_write(struct pm8607_chip *chip, int reg,
+ unsigned char data)
+{
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ ret = chip->write(chip, reg, 1, &data);
+ mutex_unlock(&chip->io_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(pm8607_reg_write);
+
+int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
+ int count, unsigned char *buf)
+{
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ ret = chip->read(chip, reg, count, buf);
+ mutex_unlock(&chip->io_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(pm8607_bulk_read);
+
+int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
+ int count, unsigned char *buf)
+{
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ ret = chip->write(chip, reg, count, buf);
+ mutex_unlock(&chip->io_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(pm8607_bulk_write);
+
+int pm8607_set_bits(struct pm8607_chip *chip, int reg,
+ unsigned char mask, unsigned char data)
+{
+ unsigned char value;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ ret = chip->read(chip, reg, 1, &value);
+ if (ret < 0)
+ goto out;
+ value &= ~mask;
+ value |= data;
+ ret = chip->write(chip, reg, 1, &value);
+out:
+ mutex_unlock(&chip->io_lock);
+ return ret;
+}
+EXPORT_SYMBOL(pm8607_set_bits);
+
+
+static const struct i2c_device_id pm860x_id_table[] = {
+ { "88PM8607", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, pm860x_id_table);
+
+static int __devinit pm860x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pm8607_platform_data *pdata = client->dev.platform_data;
+ struct pm8607_chip *chip;
+ int ret;
+
+ chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
+ if (chip == NULL)
+ return -ENOMEM;
+
+ chip->client = client;
+ chip->dev = &client->dev;
+ chip->read = pm8607_read_device;
+ chip->write = pm8607_write_device;
+ memcpy(&chip->id, id, sizeof(struct i2c_device_id));
+ i2c_set_clientdata(client, chip);
+
+ mutex_init(&chip->io_lock);
+ dev_set_drvdata(chip->dev, chip);
+
+ ret = pm860x_device_init(chip, pdata);
+ if (ret < 0)
+ goto out;
+
+
+ return 0;
+
+out:
+ i2c_set_clientdata(client, NULL);
+ kfree(chip);
+ return ret;
+}
+
+static int __devexit pm860x_remove(struct i2c_client *client)
+{
+ struct pm8607_chip *chip = i2c_get_clientdata(client);
+
+ kfree(chip);
+ return 0;
+}
+
+static struct i2c_driver pm860x_driver = {
+ .driver = {
+ .name = "88PM860x",
+ .owner = THIS_MODULE,
+ },
+ .probe = pm860x_probe,
+ .remove = __devexit_p(pm860x_remove),
+ .id_table = pm860x_id_table,
+};
+
+static int __init pm860x_i2c_init(void)
+{
+ int ret;
+ ret = i2c_add_driver(&pm860x_driver);
+ if (ret != 0)
+ pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
+ return ret;
+}
+subsys_initcall(pm860x_i2c_init);
+
+static void __exit pm860x_i2c_exit(void)
+{
+ i2c_del_driver(&pm860x_driver);
+}
+module_exit(pm860x_i2c_exit);
+
+MODULE_DESCRIPTION("I2C Driver for Marvell 88PM860x");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
+MODULE_LICENSE("GPL");