diff options
| -rw-r--r-- | drivers/media/video/soc_camera.c | 86 | ||||
| -rw-r--r-- | include/media/soc_camera.h | 5 |
2 files changed, 70 insertions, 21 deletions
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index aba4ce92a86..a66811b4371 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -24,6 +24,7 @@ #include <linux/mutex.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/vmalloc.h> @@ -43,6 +44,51 @@ static LIST_HEAD(hosts); static LIST_HEAD(devices); static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ +static int soc_camera_power_set(struct soc_camera_device *icd, + struct soc_camera_link *icl, + int power_on) +{ + int ret; + + if (power_on) { + ret = regulator_bulk_enable(icl->num_regulators, + icl->regulators); + if (ret < 0) { + dev_err(&icd->dev, "Cannot enable regulators\n"); + return ret; + } + + if (icl->power) + ret = icl->power(icd->pdev, power_on); + if (ret < 0) { + dev_err(&icd->dev, + "Platform failed to power-on the camera.\n"); + + regulator_bulk_disable(icl->num_regulators, + icl->regulators); + return ret; + } + } else { + ret = 0; + if (icl->power) + ret = icl->power(icd->pdev, 0); + if (ret < 0) { + dev_err(&icd->dev, + "Platform failed to power-off the camera.\n"); + return ret; + } + + ret = regulator_bulk_disable(icl->num_regulators, + icl->regulators); + if (ret < 0) { + dev_err(&icd->dev, "Cannot disable regulators\n"); + return ret; + } + } + + return 0; +} + const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( struct soc_camera_device *icd, unsigned int fourcc) { @@ -369,11 +415,9 @@ static int soc_camera_open(struct file *file) }, }; - if (icl->power) { - ret = icl->power(icd->pdev, 1); - if (ret < 0) - goto epower; - } + ret = soc_camera_power_set(icd, icl, 1); + if (ret < 0) + goto epower; /* The camera could have been already on, try to reset */ if (icl->reset) @@ -417,8 +461,7 @@ esfmt: eresume: ici->ops->remove(icd); eiciadd: - if (icl->power) - icl->power(icd->pdev, 0); + soc_camera_power_set(icd, icl, 0); epower: icd->use_count--; module_put(ici->ops->owner); @@ -440,8 +483,7 @@ static int soc_camera_close(struct file *file) ici->ops->remove(icd); - if (icl->power) - icl->power(icd->pdev, 0); + soc_camera_power_set(icd, icl, 0); } if (icd->streamer == file) @@ -908,14 +950,14 @@ static int soc_camera_probe(struct device *dev) dev_info(dev, "Probing %s\n", dev_name(dev)); - if (icl->power) { - ret = icl->power(icd->pdev, 1); - if (ret < 0) { - dev_err(dev, - "Platform failed to power-on the camera.\n"); - goto epower; - } - } + ret = regulator_bulk_get(icd->pdev, icl->num_regulators, + icl->regulators); + if (ret < 0) + goto ereg; + + ret = soc_camera_power_set(icd, icl, 1); + if (ret < 0) + goto epower; /* The camera could have been already on, try to reset */ if (icl->reset) @@ -994,8 +1036,7 @@ static int soc_camera_probe(struct device *dev) ici->ops->remove(icd); - if (icl->power) - icl->power(icd->pdev, 0); + soc_camera_power_set(icd, icl, 0); mutex_unlock(&icd->video_lock); @@ -1017,9 +1058,10 @@ eadddev: evdc: ici->ops->remove(icd); eadd: - if (icl->power) - icl->power(icd->pdev, 0); + soc_camera_power_set(icd, icl, 0); epower: + regulator_bulk_free(icl->num_regulators, icl->regulators); +ereg: return ret; } @@ -1052,6 +1094,8 @@ static int soc_camera_remove(struct device *dev) } soc_camera_free_user_formats(icd); + regulator_bulk_free(icl->num_regulators, icl->regulators); + return 0; } diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h index 86e3631764e..9386db829fb 100644 --- a/include/media/soc_camera.h +++ b/include/media/soc_camera.h @@ -97,6 +97,7 @@ struct soc_camera_host_ops { #define SOCAM_SENSOR_INVERT_DATA (1 << 4) struct i2c_board_info; +struct regulator_bulk_data; struct soc_camera_link { /* Camera bus id, used to match a camera and a bus */ @@ -108,6 +109,10 @@ struct soc_camera_link { const char *module_name; void *priv; + /* Optional regulators that have to be managed on power on/off events */ + struct regulator_bulk_data *regulators; + int num_regulators; + /* * For non-I2C devices platform platform has to provide methods to * add a device to the system and to remove |