[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/mfd/wm8350-i2c.c b/ap/os/linux/linux-3.4.x/drivers/mfd/wm8350-i2c.c
new file mode 100644
index 0000000..d955faa
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/mfd/wm8350-i2c.c
@@ -0,0 +1,128 @@
+/*
+ * 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/init.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/wm8350/core.h>
+#include <linux/slab.h>
+
+static int wm8350_i2c_read_device(struct wm8350 *wm8350, char reg,
+ int bytes, void *dest)
+{
+ int ret;
+
+ ret = i2c_master_send(wm8350->i2c_client, ®, 1);
+ if (ret < 0)
+ return ret;
+ ret = i2c_master_recv(wm8350->i2c_client, dest, bytes);
+ if (ret < 0)
+ return ret;
+ if (ret != bytes)
+ return -EIO;
+ return 0;
+}
+
+static int wm8350_i2c_write_device(struct wm8350 *wm8350, char reg,
+ int bytes, void *src)
+{
+ /* we add 1 byte for device register */
+ u8 msg[(WM8350_MAX_REGISTER << 1) + 1];
+ int ret;
+
+ if (bytes > ((WM8350_MAX_REGISTER << 1) + 1))
+ return -EINVAL;
+
+ msg[0] = reg;
+ memcpy(&msg[1], src, bytes);
+ ret = i2c_master_send(wm8350->i2c_client, msg, bytes + 1);
+ if (ret < 0)
+ return ret;
+ if (ret != bytes + 1)
+ return -EIO;
+ return 0;
+}
+
+static int wm8350_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct wm8350 *wm8350;
+ int ret = 0;
+
+ wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
+ if (wm8350 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, wm8350);
+ wm8350->dev = &i2c->dev;
+ wm8350->i2c_client = i2c;
+ wm8350->read_dev = wm8350_i2c_read_device;
+ wm8350->write_dev = wm8350_i2c_write_device;
+
+ ret = wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
+ if (ret < 0)
+ goto err;
+
+ return ret;
+
+err:
+ return ret;
+}
+
+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");