Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / wm831x-i2c.c

diff --git a/kernel/drivers/mfd/wm831x-i2c.c b/kernel/drivers/mfd/wm831x-i2c.c
new file mode 100644 (file)
index 0000000..a4cbefe
--- /dev/null
+++ b/kernel/drivers/mfd/wm831x-i2c.c
@@ -0,0 +1,120 @@
+/*
+ * wm831x-i2c.c  --  I2C access for Wolfson WM831x PMICs
+ *
+ * Copyright 2009,2010 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.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/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/mfd/core.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/pdata.h>
+
+static int wm831x_i2c_probe(struct i2c_client *i2c,
+                           const struct i2c_device_id *id)
+{
+       struct wm831x *wm831x;
+       int ret;
+
+       wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
+       if (wm831x == NULL)
+               return -ENOMEM;
+
+       i2c_set_clientdata(i2c, wm831x);
+       wm831x->dev = &i2c->dev;
+
+       wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
+       if (IS_ERR(wm831x->regmap)) {
+               ret = PTR_ERR(wm831x->regmap);
+               dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
+                       ret);
+               return ret;
+       }
+
+       return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
+}
+
+static int wm831x_i2c_remove(struct i2c_client *i2c)
+{
+       struct wm831x *wm831x = i2c_get_clientdata(i2c);
+
+       wm831x_device_exit(wm831x);
+
+       return 0;
+}
+
+static int wm831x_i2c_suspend(struct device *dev)
+{
+       struct wm831x *wm831x = dev_get_drvdata(dev);
+
+       return wm831x_device_suspend(wm831x);
+}
+
+static int wm831x_i2c_poweroff(struct device *dev)
+{
+       struct wm831x *wm831x = dev_get_drvdata(dev);
+
+       wm831x_device_shutdown(wm831x);
+
+       return 0;
+}
+
+static const struct i2c_device_id wm831x_i2c_id[] = {
+       { "wm8310", WM8310 },
+       { "wm8311", WM8311 },
+       { "wm8312", WM8312 },
+       { "wm8320", WM8320 },
+       { "wm8321", WM8321 },
+       { "wm8325", WM8325 },
+       { "wm8326", WM8326 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
+
+static const struct dev_pm_ops wm831x_pm_ops = {
+       .suspend = wm831x_i2c_suspend,
+       .poweroff = wm831x_i2c_poweroff,
+};
+
+static struct i2c_driver wm831x_i2c_driver = {
+       .driver = {
+               .name = "wm831x",
+               .owner = THIS_MODULE,
+               .pm = &wm831x_pm_ops,
+       },
+       .probe = wm831x_i2c_probe,
+       .remove = wm831x_i2c_remove,
+       .id_table = wm831x_i2c_id,
+};
+
+static int __init wm831x_i2c_init(void)
+{
+       int ret;
+
+       ret = i2c_add_driver(&wm831x_i2c_driver);
+       if (ret != 0)
+               pr_err("Failed to register wm831x I2C driver: %d\n", ret);
+
+       return ret;
+}
+subsys_initcall(wm831x_i2c_init);
+
+static void __exit wm831x_i2c_exit(void)
+{
+       i2c_del_driver(&wm831x_i2c_driver);
+}
+module_exit(wm831x_i2c_exit);