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[media] s5p-fimc: Add clk_prepare/unprepare for sclk_cam clocks

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Add clk_prepare(), clk_unprepare() calls for the sclk_cam clocks
to ensure the driver works on platforms with the common clocks
API enabled.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2013-01-18 15:34:37 -03:00 committed by Mauro Carvalho Chehab
parent 8b164105d8
commit 0e23cbbe47
1 changed files with 40 additions and 21 deletions
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61
drivers/media/platform/s5p-fimc/fimc-mdevice.c
View file

@ -708,37 +708,56 @@ static int fimc_md_create_links(struct fimc_md *fmd)
/*
* The peripheral sensor clock management.
*/
static int fimc_md_get_clocks(struct fimc_md *fmd)
{
char clk_name[32];
struct clk *clock;
int i;
for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
clock = clk_get(NULL, clk_name);
if (IS_ERR(clock)) {
v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s",
clk_name);
return -ENXIO;
}
fmd->camclk[i].clock = clock;
}
return 0;
}
static void fimc_md_put_clocks(struct fimc_md *fmd)
{
int i = FIMC_MAX_CAMCLKS;
while (--i >= 0) {
if (IS_ERR_OR_NULL(fmd->camclk[i].clock))
if (IS_ERR(fmd->camclk[i].clock))
continue;
clk_unprepare(fmd->camclk[i].clock);
clk_put(fmd->camclk[i].clock);
fmd->camclk[i].clock = NULL;
fmd->camclk[i].clock = ERR_PTR(-EINVAL);
}
}
static int fimc_md_get_clocks(struct fimc_md *fmd)
{
struct device *dev = NULL;
char clk_name[32];
struct clk *clock;
int ret, i;
for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
fmd->camclk[i].clock = ERR_PTR(-EINVAL);
if (fmd->pdev->dev.of_node)
dev = &fmd->pdev->dev;
for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
clock = clk_get(dev, clk_name);
if (IS_ERR(clock)) {
dev_err(&fmd->pdev->dev, "Failed to get clock: %s\n",
clk_name);
ret = PTR_ERR(clock);
break;
}
ret = clk_prepare(clock);
if (ret < 0) {
clk_put(clock);
fmd->camclk[i].clock = ERR_PTR(-EINVAL);
break;
}
fmd->camclk[i].clock = clock;
}
if (ret)
fimc_md_put_clocks(fmd);
return ret;
}
static int __fimc_md_set_camclk(struct fimc_md *fmd,
struct fimc_sensor_info *s_info,
bool on)