mfd: Support 88pm80x in 80x driver

[cascardo/linux.git] / drivers / mfd / 88pm80x.c

diff --git a/drivers/mfd/88pm80x.c b/drivers/mfd/88pm80x.c
new file mode 100644 (file)
index 0000000..90aa18a
--- /dev/null
+++ b/drivers/mfd/88pm80x.c
@@ -0,0 +1,116 @@
+/*
+ * I2C driver for Marvell 88PM80x
+ *
+ * Copyright (C) 2012 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhuang@marvell.com>
+ * Joseph(Yossi) Hanin <yhanin@marvell.com>
+ * Qiao Zhou <zhouqiao@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/i2c.h>
+#include <linux/mfd/88pm80x.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/err.h>
+
+
+const struct regmap_config pm80x_regmap_config = {
+       .reg_bits = 8,
+       .val_bits = 8,
+};
+
+int __devinit pm80x_init(struct i2c_client *client,
+                                const struct i2c_device_id *id)
+{
+       struct pm80x_chip *chip;
+       struct regmap *map;
+       int ret = 0;
+
+       chip =
+           devm_kzalloc(&client->dev, sizeof(struct pm80x_chip), GFP_KERNEL);
+       if (!chip)
+               return -ENOMEM;
+
+       map = devm_regmap_init_i2c(client, &pm80x_regmap_config);
+       if (IS_ERR(map)) {
+               ret = PTR_ERR(map);
+               dev_err(&client->dev, "Failed to allocate register map: %d\n",
+                       ret);
+               goto err_regmap_init;
+       }
+
+       chip->id = id->driver_data;
+       if (chip->id < CHIP_PM800 || chip->id > CHIP_PM805) {
+               ret = -EINVAL;
+               goto err_chip_id;
+       }
+
+       chip->client = client;
+       chip->regmap = map;
+
+       chip->irq = client->irq;
+
+       chip->dev = &client->dev;
+       dev_set_drvdata(chip->dev, chip);
+       i2c_set_clientdata(chip->client, chip);
+
+       device_init_wakeup(&client->dev, 1);
+
+       return 0;
+
+err_chip_id:
+       regmap_exit(map);
+err_regmap_init:
+       devm_kfree(&client->dev, chip);
+       return ret;
+}
+EXPORT_SYMBOL_GPL(pm80x_init);
+
+int __devexit pm80x_deinit(struct i2c_client *client)
+{
+       struct pm80x_chip *chip = i2c_get_clientdata(client);
+
+       regmap_exit(chip->regmap);
+       devm_kfree(&client->dev, chip);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(pm80x_deinit);
+
+#ifdef CONFIG_PM_SLEEP
+static int pm80x_suspend(struct device *dev)
+{
+       struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+       struct pm80x_chip *chip = i2c_get_clientdata(client);
+
+       if (chip && chip->wu_flag)
+               if (device_may_wakeup(chip->dev))
+                       enable_irq_wake(chip->irq);
+
+       return 0;
+}
+
+static int pm80x_resume(struct device *dev)
+{
+       struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+       struct pm80x_chip *chip = i2c_get_clientdata(client);
+
+       if (chip && chip->wu_flag)
+               if (device_may_wakeup(chip->dev))
+                       disable_irq_wake(chip->irq);
+
+       return 0;
+}
+#endif
+
+SIMPLE_DEV_PM_OPS(pm80x_pm_ops, pm80x_suspend, pm80x_resume);
+EXPORT_SYMBOL_GPL(pm80x_pm_ops);
+
+MODULE_DESCRIPTION("I2C Driver for Marvell 88PM80x");
+MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
+MODULE_LICENSE("GPL");