The regulators are optional. If present, enable them when powering the sensor up, and disable them when powering it down.
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com> --- drivers/media/video/mt9p031.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/drivers/media/video/mt9p031.c b/drivers/media/video/mt9p031.c index 8f061d9..d0b8e36 100644 --- a/drivers/media/video/mt9p031.c +++ b/drivers/media/video/mt9p031.c @@ -19,6 +19,7 @@ #include <linux/i2c.h> #include <linux/log2.h> #include <linux/pm.h> +#include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/videodev2.h> @@ -121,6 +122,9 @@ struct mt9p031 { struct mutex power_lock; /* lock to protect power_count */ int power_count; + struct regulator *vdd_core; + struct regulator *vdd_io; + enum mt9p031_model model; struct aptina_pll pll; int reset; @@ -264,6 +268,12 @@ static int mt9p031_power_on(struct mt9p031 *mt9p031) usleep_range(1000, 2000); } + /* Bring up the supplies */ + if (mt9p031->vdd_core) + regulator_enable(mt9p031->vdd_core); + if (mt9p031->vdd_io) + regulator_enable(mt9p031->vdd_io); + /* Emable clock */ if (mt9p031->pdata->set_xclk) mt9p031->pdata->set_xclk(&mt9p031->subdev, @@ -285,6 +295,11 @@ static void mt9p031_power_off(struct mt9p031 *mt9p031) usleep_range(1000, 2000); } + if (mt9p031->vdd_io) + regulator_disable(mt9p031->vdd_io); + if (mt9p031->vdd_core) + regulator_disable(mt9p031->vdd_core); + if (mt9p031->pdata->set_xclk) mt9p031->pdata->set_xclk(&mt9p031->subdev, 0); } @@ -950,6 +965,9 @@ static int mt9p031_probe(struct i2c_client *client, mt9p031->model = did->driver_data; mt9p031->reset = -1; + mt9p031->vdd_core = devm_regulator_get(&client->dev, "cam_core"); + mt9p031->vdd_io = devm_regulator_get(&client->dev, "cam_io"); + v4l2_ctrl_handler_init(&mt9p031->ctrls, ARRAY_SIZE(mt9p031_ctrls) + 4); v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops, -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html