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authorLad, Prabhakar <prabhakar.csengg@gmail.com>2013-03-22 11:53:12 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-04-15 03:08:09 +0400
commit9a3e89b10f5e48c0d8cca7896c02bf4d76d0ae46 (patch)
tree2b1d3c265b377a87f2fd89945333936e733f0e96 /drivers/media/platform/davinci/vpss.c
parent407ccc65bfd2899ed008c4f8900f23ac15f75f9f (diff)
downloadlinux-9a3e89b10f5e48c0d8cca7896c02bf4d76d0ae46.tar.xz
[media] media: davinci: vpss: enable vpss clocks
By default the VPSS clocks were enabled in capture driver for davinci family which creates duplicates for dm355/dm365/dm644x. This patch adds support to enable the VPSS clocks in VPSS driver, which avoids duplication of code and also adding clock aliases. This patch uses PM runtime API to enable/disable clock, instead of DaVinci clock framework. con_ids for master and slave clocks of vpss is added in pm_domain. This patch cleanups the VPSS clock enabling in the capture driver, and also removes the clock alias in machine file. Along side adds a vpss slave clock for DM365 as mentioned by Sekhar (https://patchwork.kernel.org/patch/1221261/). The Suspend/Resume in dm644x_ccdc.c which enabled/disabled the VPSS clock is now implemented as part of the VPSS driver. Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/platform/davinci/vpss.c')
-rw-r--r--drivers/media/platform/davinci/vpss.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/media/platform/davinci/vpss.c b/drivers/media/platform/davinci/vpss.c
index a19c552232d1..d36429d1bd69 100644
--- a/drivers/media/platform/davinci/vpss.c
+++ b/drivers/media/platform/davinci/vpss.c
@@ -25,6 +25,8 @@
#include <linux/spinlock.h>
#include <linux/compiler.h>
#include <linux/io.h>
+#include <linux/pm_runtime.h>
+
#include <media/davinci/vpss.h>
MODULE_LICENSE("GPL");
@@ -490,6 +492,10 @@ static int vpss_probe(struct platform_device *pdev)
} else
oper_cfg.hw_ops.clear_wbl_overflow = dm644x_clear_wbl_overflow;
+ pm_runtime_enable(&pdev->dev);
+
+ pm_runtime_get(&pdev->dev);
+
spin_lock_init(&oper_cfg.vpss_lock);
dev_info(&pdev->dev, "%s vpss probe success\n", platform_name);
return 0;
@@ -507,6 +513,7 @@ static int vpss_remove(struct platform_device *pdev)
{
struct resource *res;
+ pm_runtime_disable(&pdev->dev);
iounmap(oper_cfg.vpss_regs_base0);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
@@ -518,10 +525,28 @@ static int vpss_remove(struct platform_device *pdev)
return 0;
}
+static int vpss_suspend(struct device *dev)
+{
+ pm_runtime_put(dev);
+ return 0;
+}
+
+static int vpss_resume(struct device *dev)
+{
+ pm_runtime_get(dev);
+ return 0;
+}
+
+static const struct dev_pm_ops vpss_pm_ops = {
+ .suspend = vpss_suspend,
+ .resume = vpss_resume,
+};
+
static struct platform_driver vpss_driver = {
.driver = {
.name = "vpss",
.owner = THIS_MODULE,
+ .pm = &vpss_pm_ops,
},
.remove = vpss_remove,
.probe = vpss_probe,