diff options
Diffstat (limited to 'drivers/staging/media/atomisp/i2c/atomisp-gc0310.c')
| -rw-r--r-- | drivers/staging/media/atomisp/i2c/atomisp-gc0310.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c index 783f1b88ebf2..87a634bf9ff5 100644 --- a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c @@ -786,8 +786,6 @@ static int gpio_ctrl(struct v4l2_subdev *sd, bool flag) return ret; } -static int power_down(struct v4l2_subdev *sd); - static int power_up(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); @@ -800,6 +798,9 @@ static int power_up(struct v4l2_subdev *sd) return -ENODEV; } + if (dev->power_on) + return 0; /* Already on */ + /* power control */ ret = power_ctrl(sd, 1); if (ret) @@ -820,6 +821,7 @@ static int power_up(struct v4l2_subdev *sd) msleep(100); + dev->power_on = true; return 0; fail_gpio: @@ -844,6 +846,9 @@ static int power_down(struct v4l2_subdev *sd) return -ENODEV; } + if (!dev->power_on) + return 0; /* Already off */ + /* gpio ctrl */ ret = gpio_ctrl(sd, 0); if (ret) { @@ -861,6 +866,7 @@ static int power_down(struct v4l2_subdev *sd) if (ret) dev_err(&client->dev, "vprog failed.\n"); + dev->power_on = false; return ret; } @@ -935,6 +941,9 @@ static int gc0310_set_fmt(struct v4l2_subdev *sd, return 0; } + /* s_power has not been called yet for std v4l2 clients (camorama) */ + power_up(sd); + dev_dbg(&client->dev, "%s: before gc0310_write_reg_array %s\n", __func__, dev->res->desc); ret = startup(sd); @@ -1073,6 +1082,7 @@ static int gc0310_s_config(struct v4l2_subdev *sd, * as first power on by board may not fulfill the * power on sequqence needed by the module */ + dev->power_on = true; /* force power_down() to run */ ret = power_down(sd); if (ret) { dev_err(&client->dev, "gc0310 power-off err.\n"); |