Add hooks to allow the LCDC to increase/decrease the MERAM PM reference
counts
Signed-off-by: Damian Hobson-Garcia <dhobsong@xxxxxxxxxx>
---
Changes from V2
===============
* Change the names of the clk_on/clk_off callbacks to pm_get_sync/pm_put_sync
to better reflect their actual functionality
* Make these callback functions static
drivers/video/sh_mobile_meram.c | 27 +++++++++++++++++++++++++++
include/video/sh_mobile_meram.h | 6 ++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c
index 9170c82..371f129 100644
--- a/drivers/video/sh_mobile_meram.c
+++ b/drivers/video/sh_mobile_meram.c
@@ -12,6 +12,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
+#include <linux/pm_runtime.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
@@ -460,11 +461,33 @@ static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata,
return 0;
}
+static int sh_mobile_meram_pm_get_sync(struct sh_mobile_meram_info *pdata)
+{
+ if (!pdata || !pdata->pdev)
+ return -EINVAL;
+
+ dev_dbg(&pdata->pdev->dev, "Enabling sh_mobile_meram clock.");
+ pm_runtime_get_sync(&pdata->pdev->dev);
+ return 0;
+}
+
+static int sh_mobile_meram_pm_put_sync(struct sh_mobile_meram_info *pdata)
+{
+ if (!pdata || !pdata->pdev)
+ return -EINVAL;
+
+ dev_dbg(&pdata->pdev->dev, "Disabling sh_mobile_meram clock.");
+ pm_runtime_put_sync(&pdata->pdev->dev);
+ return 0;
+}
+
static struct sh_mobile_meram_ops sh_mobile_meram_ops = {
.module = THIS_MODULE,
.meram_register = sh_mobile_meram_register,
.meram_unregister = sh_mobile_meram_unregister,
.meram_update = sh_mobile_meram_update,
+ .meram_pm_put_sync = sh_mobile_meram_pm_put_sync,
+ .meram_pm_get_sync = sh_mobile_meram_pm_get_sync,
};
/*
@@ -515,6 +538,8 @@ static int __devinit sh_mobile_meram_probe(struct platform_device *pdev)
if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1)
meram_write_reg(priv->base, MEVCR1, 1 << 29);
+ pm_runtime_enable(&pdev->dev);
+
dev_info(&pdev->dev, "sh_mobile_meram initialized.");
return 0;
@@ -530,6 +555,8 @@ static int sh_mobile_meram_remove(struct platform_device *pdev)
{
struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);
+ pm_runtime_disable(&pdev->dev);
+
if (priv->base)
iounmap(priv->base);
diff --git a/include/video/sh_mobile_meram.h b/include/video/sh_mobile_meram.h
index af602d6..f213b6d 100644
--- a/include/video/sh_mobile_meram.h
+++ b/include/video/sh_mobile_meram.h
@@ -63,6 +63,12 @@ struct sh_mobile_meram_ops {
unsigned long base_addr_c,
unsigned long *icb_addr_y,
unsigned long *icb_addr_c);
+
+ /* enable meram clock */
+ int (*meram_pm_get_sync)(struct sh_mobile_meram_info *meram_dev);
+
+ /* disable meram clock */
+ int (*meram_pm_put_sync)(struct sh_mobile_meram_info *meram_dev);
};
#endif /* __VIDEO_SH_MOBILE_MERAM_H__ */
--
1.7.1
--
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