Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / da9055-i2c.c

diff --git a/kernel/drivers/mfd/da9055-i2c.c b/kernel/drivers/mfd/da9055-i2c.c
new file mode 100644 (file)
index 0000000..d4d4c16
--- /dev/null
+++ b/kernel/drivers/mfd/da9055-i2c.c
@@ -0,0 +1,109 @@
+ /* I2C access for DA9055 PMICs.
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.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/device.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include <linux/mfd/da9055/core.h>
+
+static int da9055_i2c_probe(struct i2c_client *i2c,
+                                     const struct i2c_device_id *id)
+{
+       struct da9055 *da9055;
+       int ret;
+
+       da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
+       if (!da9055)
+               return -ENOMEM;
+
+       da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
+       if (IS_ERR(da9055->regmap)) {
+               ret = PTR_ERR(da9055->regmap);
+               dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+                       ret);
+               return ret;
+       }
+
+       da9055->dev = &i2c->dev;
+       da9055->chip_irq = i2c->irq;
+
+       i2c_set_clientdata(i2c, da9055);
+
+       return da9055_device_init(da9055);
+}
+
+static int da9055_i2c_remove(struct i2c_client *i2c)
+{
+       struct da9055 *da9055 = i2c_get_clientdata(i2c);
+
+       da9055_device_exit(da9055);
+
+       return 0;
+}
+
+/*
+ * DO NOT change the device Ids. The naming is intentionally specific as both
+ * the PMIC and CODEC parts of this chip are instantiated separately as I2C
+ * devices (both have configurable I2C addresses, and are to all intents and
+ * purposes separate). As a result there are specific DA9055 ids for PMIC
+ * and CODEC, which must be different to operate together.
+ */
+static struct i2c_device_id da9055_i2c_id[] = {
+       {"da9055-pmic", 0},
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
+
+static const struct of_device_id da9055_of_match[] = {
+       { .compatible = "dlg,da9055-pmic", },
+       { }
+};
+
+static struct i2c_driver da9055_i2c_driver = {
+       .probe = da9055_i2c_probe,
+       .remove = da9055_i2c_remove,
+       .id_table = da9055_i2c_id,
+       .driver = {
+               .name = "da9055-pmic",
+               .owner = THIS_MODULE,
+               .of_match_table = of_match_ptr(da9055_of_match),
+       },
+};
+
+static int __init da9055_i2c_init(void)
+{
+       int ret;
+
+       ret = i2c_add_driver(&da9055_i2c_driver);
+       if (ret != 0) {
+               pr_err("DA9055 I2C registration failed %d\n", ret);
+               return ret;
+       }
+
+       return 0;
+}
+subsys_initcall(da9055_i2c_init);
+
+static void __exit da9055_i2c_exit(void)
+{
+       i2c_del_driver(&da9055_i2c_driver);
+}
+module_exit(da9055_i2c_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
+MODULE_LICENSE("GPL");