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[media] mt9m111: power down most circuits when suspended 

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski 2011-11-03 08:19:18 -03:00 committed by Mauro Carvalho Chehab
parent 47921932f3
commit a650bf1eff
1 changed files with 18 additions and 16 deletions
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34
drivers/media/video/mt9m111.c
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@ -226,7 +226,6 @@ struct mt9m111 {
const struct mt9m111_datafmt *fmt;
int lastpage; /* PageMap cache value */
unsigned char datawidth;
unsigned int powered:1;
};
static struct mt9m111 *to_mt9m111(const struct i2c_client *client)
@ -360,12 +359,7 @@ static int mt9m111_setup_rect(struct mt9m111 *mt9m111,
static int mt9m111_enable(struct mt9m111 *mt9m111)
{
struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
int ret;
ret = reg_set(RESET, MT9M111_RESET_CHIP_ENABLE);
if (!ret)
mt9m111->powered = 1;
return ret;
return reg_write(RESET, MT9M111_RESET_CHIP_ENABLE);
}
static int mt9m111_reset(struct mt9m111 *mt9m111)
@ -751,9 +745,20 @@ static int mt9m111_s_ctrl(struct v4l2_ctrl *ctrl)
static int mt9m111_suspend(struct mt9m111 *mt9m111)
{
struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
int ret;
v4l2_ctrl_s_ctrl(mt9m111->gain, mt9m111_get_global_gain(mt9m111));
return 0;
ret = reg_set(RESET, MT9M111_RESET_RESET_MODE);
if (!ret)
ret = reg_set(RESET, MT9M111_RESET_RESET_SOC |
MT9M111_RESET_OUTPUT_DISABLE |
MT9M111_RESET_ANALOG_STANDBY);
if (!ret)
ret = reg_clear(RESET, MT9M111_RESET_CHIP_ENABLE);
return ret;
}
static void mt9m111_restore_state(struct mt9m111 *mt9m111)
@ -766,15 +771,12 @@ static void mt9m111_restore_state(struct mt9m111 *mt9m111)
static int mt9m111_resume(struct mt9m111 *mt9m111)
{
int ret = 0;
int ret = mt9m111_enable(mt9m111);
if (!ret)
ret = mt9m111_reset(mt9m111);
if (!ret)
mt9m111_restore_state(mt9m111);
if (mt9m111->powered) {
ret = mt9m111_enable(mt9m111);
if (!ret)
ret = mt9m111_reset(mt9m111);
if (!ret)
mt9m111_restore_state(mt9m111);
}
return ret;
}