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Commit a650bf1e authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Mauro Carvalho Chehab
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[media] mt9m111: power down most circuits when suspended 



Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 47921932

drivers/media/video/mt9m111.c

+18 −16
Original line number Diff line number Diff line
@@ -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;



	if (mt9m111->powered) {

		ret = mt9m111_enable(mt9m111);

	int ret = mt9m111_enable(mt9m111);

	if (!ret)

		ret = mt9m111_reset(mt9m111);

	if (!ret)

		mt9m111_restore_state(mt9m111);

	}



	return ret;

}