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fix reboot PA have some noise

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This commit is contained in:
邱建斌
2011-12-29 11:30:47 +08:00
parent c4f49a7759
commit 6ebfb39bee
1 changed files with 17 additions and 0 deletions
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17
drivers/mfd/wm8994-core.c
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@@ -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,
};