[PATCH v10 05/21] atmel-isi: move interface activation and deactivation to clock callbacks

Guennadi Liakhovetski
2013-06-11T10:01:01Z

When adding and removing a client, the atmel-isi camera host driver only
activates and deactivates its camera interface respectively, which doesn't
include any client-specific actions. Move this functionality into
.clock_start() and .clock_stop() callbacks.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
---
drivers/media/platform/soc_camera/atmel-isi.c | 28 +++++++++++++++++--------
1 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index c9e080a..1044856 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -745,10 +745,23 @@ static int isi_camera_get_formats(struct soc_camera_device *icd,
return formats;
}

-/* Called with .host_lock held */
static int isi_camera_add_device(struct soc_camera_device *icd)
{
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
+ icd->devnum);
+
+ return 0;
+}
+
+static void isi_camera_remove_device(struct soc_camera_device *icd)
+{
+ dev_dbg(icd->parent, "Atmel ISI Camera driver detached from camera %d\n",
+ icd->devnum);
+}
+
+/* Called with .host_lock held */
+static int isi_camera_clock_start(struct soc_camera_host *ici)
+{
struct atmel_isi *isi = ici->priv;
int ret;

@@ -762,21 +775,16 @@ static int isi_camera_add_device(struct soc_camera_device *icd)
return ret;
}

- dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
- icd->devnum);
return 0;
}
+
/* Called with .host_lock held */
-static void isi_camera_remove_device(struct soc_camera_device *icd)
+static void isi_camera_clock_stop(struct soc_camera_host *ici)
{
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct atmel_isi *isi = ici->priv;

clk_disable(isi->mck);
clk_disable(isi->pclk);
-
- dev_dbg(icd->parent, "Atmel ISI Camera driver detached from camera %d\n",
- icd->devnum);
}

static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
@@ -880,6 +888,8 @@ static struct soc_camera_host_ops isi_soc_camera_host_ops = {
.owner = THIS_MODULE,
.add = isi_camera_add_device,
.remove = isi_camera_remove_device,
+ .clock_start = isi_camera_clock_start,
+ .clock_stop = isi_camera_clock_stop,
.set_fmt = isi_camera_set_fmt,
.try_fmt = isi_camera_try_fmt,
.get_formats = isi_camera_get_formats,
--
1.7.2.5