fix reboot PA have some noise

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 89c20f0e1c665d99a26f9bd34496f0e1b37393ed..d64fd1ab14ace089ab05c98432b6c808f9153c43 100755 (executable)
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -25,6 +25,8 @@
 #include <linux/mfd/wm8994/core.h>
 #include <linux/mfd/wm8994/pdata.h>
 #include <linux/mfd/wm8994/registers.h>
+#include <mach/gpio.h>
+#include <mach/iomux.h>
 
 #if 0
 #define DBG(x...) printk(KERN_DEBUG x)
@@ -646,6 +648,20 @@ static int wm8994_i2c_remove(struct i2c_client *i2c)
        return 0;
 }
 
+static void wm8994_i2c_shutdown(struct i2c_client *i2c)
+{
+       struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
+       struct wm8994_pdata *pdata = wm8994->dev->platform_data;
+
+       DBG("%s----%d\n",__FUNCTION__,__LINE__);
+       
+       //disable PA    
+       gpio_direction_output(pdata->PA_control_pin,GPIO_LOW);
+       if (gpio_is_valid(pdata->PA_control_pin))
+               gpio_free(pdata->PA_control_pin);
+
+}
+
 static const struct i2c_device_id wm8994_i2c_id[] = {
        { "wm8994", WM8994 },
        { "wm8958", WM8958 },
@@ -664,6 +680,7 @@ static struct i2c_driver wm8994_i2c_driver = {
        },
        .probe = wm8994_i2c_probe,
        .remove = wm8994_i2c_remove,
+       .shutdown = wm8994_i2c_shutdown,
        .id_table = wm8994_i2c_id,
 };