[PATCH v10 02/21] soc-camera: add host clock callbacks to start and stop the master clock

Guennadi Liakhovetski
2013-06-11T09:27:47Z

Currently soc-camera uses a single camera host callback to activate the
interface master clock and to configure the interface for a specific
client. However, during probing we might not have the information about
a client, we just need to activate the clock. Add new camera host driver
callbacks to only start and stop the clock without and client-specific
configuration.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
---
drivers/media/platform/soc_camera/soc_camera.c | 19 +++++++++++++++++--
include/media/soc_camera.h | 2 ++
2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
index 832f059..df90565 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -513,10 +513,23 @@ static int soc_camera_add_device(struct soc_camera_device *icd)
if (ici->icd)
return -EBUSY;

+ if (ici->ops->clock_start) {
+ ret = ici->ops->clock_start(ici);
+ if (ret < 0)
+ return ret;
+ }
+
ret = ici->ops->add(icd);
- if (!ret)
- ici->icd = icd;
+ if (ret < 0)
+ goto eadd;
+
+ ici->icd = icd;

+ return 0;
+
+eadd:
+ if (ici->ops->clock_stop)
+ ici->ops->clock_stop(ici);
return ret;
}

@@ -528,6 +541,8 @@ static void soc_camera_remove_device(struct soc_camera_device *icd)
return;

ici->ops->remove(icd);
+ if (ici->ops->clock_stop)
+ ici->ops->clock_stop(ici);
ici->icd = NULL;
}

diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index 5a46ce2..64415ee 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -74,6 +74,8 @@ struct soc_camera_host_ops {
struct module *owner;
int (*add)(struct soc_camera_device *);
void (*remove)(struct soc_camera_device *);
+ int (*clock_start)(struct soc_camera_host *);
+ void (*clock_stop)(struct soc_camera_host *);
/*
* .get_formats() is called for each client device format, but
* .put_formats() is only called once. Further, if any of the calls to
--
1.7.2.5