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[media] exynos-gsc: Simplify clock management 

Instead of having separate functions that fetches, prepares and
unprepares the clock, let's encapsulate this code into ->probe().

This makes error handling easier and decreases the lines of code.

[mszyprow: rebased onto v4.9-rc4]

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Ulf Hansson 2016-11-09 12:23:50 -02:00 committed by Mauro Carvalho Chehab
parent 43e6347f40
commit d83db90456
1 changed files with 14 additions and 35 deletions
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49
drivers/media/platform/exynos-gsc/gsc-core.c
View File

@ -1001,36 +1001,6 @@ static void *gsc_get_drv_data(struct platform_device *pdev)
return driver_data;
}
static void gsc_clk_put(struct gsc_dev *gsc)
{
if (!IS_ERR(gsc->clock))
clk_unprepare(gsc->clock);
}
static int gsc_clk_get(struct gsc_dev *gsc)
{
int ret;
dev_dbg(&gsc->pdev->dev, "gsc_clk_get Called\n");
gsc->clock = devm_clk_get(&gsc->pdev->dev, GSC_CLOCK_GATE_NAME);
if (IS_ERR(gsc->clock)) {
dev_err(&gsc->pdev->dev, "failed to get clock~~~: %s\n",
GSC_CLOCK_GATE_NAME);
return PTR_ERR(gsc->clock);
}
ret = clk_prepare(gsc->clock);
if (ret < 0) {
dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
GSC_CLOCK_GATE_NAME);
gsc->clock = ERR_PTR(-EINVAL);
return ret;
}
return 0;
}
static int gsc_m2m_suspend(struct gsc_dev *gsc)
{
unsigned long flags;
@ -1098,7 +1068,6 @@ static int gsc_probe(struct platform_device *pdev)
init_waitqueue_head(&gsc->irq_queue);
spin_lock_init(&gsc->slock);
mutex_init(&gsc->lock);
gsc->clock = ERR_PTR(-EINVAL);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
gsc->regs = devm_ioremap_resource(dev, res);
@ -1111,9 +1080,19 @@ static int gsc_probe(struct platform_device *pdev)
return -ENXIO;
}
ret = gsc_clk_get(gsc);
if (ret)
gsc->clock = devm_clk_get(dev, GSC_CLOCK_GATE_NAME);
if (IS_ERR(gsc->clock)) {
dev_err(dev, "failed to get clock~~~: %s\n",
GSC_CLOCK_GATE_NAME);
return PTR_ERR(gsc->clock);
}
ret = clk_prepare(gsc->clock);
if (ret) {
dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
GSC_CLOCK_GATE_NAME);
return ret;
}
ret = devm_request_irq(dev, res->start, gsc_irq_handler,
0, pdev->name, gsc);
@ -1148,7 +1127,7 @@ err_m2m:
err_v4l2:
v4l2_device_unregister(&gsc->v4l2_dev);
err_clk:
gsc_clk_put(gsc);
clk_unprepare(gsc->clock);
return ret;
}
@ -1161,7 +1140,7 @@ static int gsc_remove(struct platform_device *pdev)
vb2_dma_contig_clear_max_seg_size(&pdev->dev);
pm_runtime_disable(&pdev->dev);
gsc_clk_put(gsc);
clk_unprepare(gsc->clock);
dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
return 0;