diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2011-11-03 08:19:18 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-01-06 11:00:35 -0200 |
| commit | a650bf1eff31d9719b51f33716617692a17b6794 (patch) | |
| tree | 99ad73c5aaa520e606ddd27d1a28ed3f99815c67 | |
| parent | 47921932f36c79e51f3bf40ab9632fa50309079a (diff) | |
[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>
| -rw-r--r-- | drivers/media/video/mt9m111.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/drivers/media/video/mt9m111.c b/drivers/media/video/mt9m111.c index 71d862bfd9f..1405005266c 100644 --- a/drivers/media/video/mt9m111.c +++ b/drivers/media/video/mt9m111.c @@ -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; } |