Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / wm8350-i2c.c

diff --git a/kernel/drivers/mfd/wm8350-i2c.c b/kernel/drivers/mfd/wm8350-i2c.c
new file mode 100644 (file)
index 0000000..6a16a8a
--- /dev/null
+++ b/kernel/drivers/mfd/wm8350-i2c.c
@@ -0,0 +1,93 @@
+/*
+ * wm8350-i2c.c  --  Generic I2C driver for Wolfson WM8350 PMIC
+ *
+ * Copyright 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Author: Liam Girdwood
+ *         linux@wolfsonmicro.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/wm8350/core.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static int wm8350_i2c_probe(struct i2c_client *i2c,
+                           const struct i2c_device_id *id)
+{
+       struct wm8350 *wm8350;
+       struct wm8350_platform_data *pdata = dev_get_platdata(&i2c->dev);
+       int ret = 0;
+
+       wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
+       if (wm8350 == NULL)
+               return -ENOMEM;
+
+       wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
+       if (IS_ERR(wm8350->regmap)) {
+               ret = PTR_ERR(wm8350->regmap);
+               dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+                       ret);
+               return ret;
+       }
+
+       i2c_set_clientdata(i2c, wm8350);
+       wm8350->dev = &i2c->dev;
+
+       return wm8350_device_init(wm8350, i2c->irq, pdata);
+}
+
+static int wm8350_i2c_remove(struct i2c_client *i2c)
+{
+       struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
+
+       wm8350_device_exit(wm8350);
+
+       return 0;
+}
+
+static const struct i2c_device_id wm8350_i2c_id[] = {
+       { "wm8350", 0 },
+       { "wm8351", 0 },
+       { "wm8352", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
+
+
+static struct i2c_driver wm8350_i2c_driver = {
+       .driver = {
+                  .name = "wm8350",
+                  .owner = THIS_MODULE,
+       },
+       .probe = wm8350_i2c_probe,
+       .remove = wm8350_i2c_remove,
+       .id_table = wm8350_i2c_id,
+};
+
+static int __init wm8350_i2c_init(void)
+{
+       return i2c_add_driver(&wm8350_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(wm8350_i2c_init);
+
+static void __exit wm8350_i2c_exit(void)
+{
+       i2c_del_driver(&wm8350_i2c_driver);
+}
+module_exit(wm8350_i2c_exit);
+
+MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
+MODULE_LICENSE("GPL");