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Subject[PATCH 4/7] mfd: arizona: I2C bus interface
Date
Several forthcoming Wolfson devices are based on a common platform
known as Arizona allowing a great deal of reuse of driver code. This
patch adds I2C bus interface code for the devices.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
drivers/mfd/arizona-i2c.c | 89 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 89 insertions(+)
create mode 100644 drivers/mfd/arizona-i2c.c

diff --git a/drivers/mfd/arizona-i2c.c b/drivers/mfd/arizona-i2c.c
new file mode 100644
index 0000000..75fb110
--- /dev/null
+++ b/drivers/mfd/arizona-i2c.c
@@ -0,0 +1,89 @@
+/*
+ * Arizona-i2c.c -- Arizona I2C bus interface
+ *
+ * Copyright 2012 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/arizona/core.h>
+
+#include "arizona.h"
+
+static __devinit int arizona_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct arizona *arizona;
+ const struct regmap_config *regmap_config;
+ int ret;
+
+ switch (id->driver_data) {
+ case WM5102:
+ regmap_config = &wm5102_i2c_regmap;
+ break;
+ default:
+ dev_err(&i2c->dev, "Unknown device type %ld\n",
+ id->driver_data);
+ return -EINVAL;
+ }
+
+ arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
+ if (arizona == NULL)
+ return -ENOMEM;
+
+ arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
+ if (IS_ERR(arizona->regmap)) {
+ ret = PTR_ERR(arizona->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ arizona->type = id->driver_data;
+ arizona->dev = &i2c->dev;
+ arizona->irq = i2c->irq;
+
+ return arizona_dev_init(arizona);
+}
+
+static int __devexit arizona_i2c_remove(struct i2c_client *i2c)
+{
+ struct arizona *arizona = dev_get_drvdata(&i2c->dev);
+ arizona_dev_exit(arizona);
+ return 0;
+}
+
+static const struct i2c_device_id arizona_i2c_id[] = {
+ { "wm5102", WM5102 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
+
+static struct i2c_driver arizona_i2c_driver = {
+ .driver = {
+ .name = "arizona",
+ .owner = THIS_MODULE,
+ .pm = &arizona_pm_ops,
+ },
+ .probe = arizona_i2c_probe,
+ .remove = __devexit_p(arizona_i2c_remove),
+ .id_table = arizona_i2c_id,
+};
+
+module_i2c_driver(arizona_i2c_driver);
+
+MODULE_DESCRIPTION("Arizona I2C bus interface");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
--
1.7.10


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