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path: root/drivers/clocksource/sh_tmu.c
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-rw-r--r--drivers/clocksource/sh_tmu.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 808135768617..17296288a205 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -25,6 +25,7 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/irq.h>
#include <linux/err.h>
#include <linux/clocksource.h>
@@ -109,10 +110,12 @@ static int sh_tmu_enable(struct sh_tmu_priv *p)
{
int ret;
- /* enable clock */
+ /* wake up device and enable clock */
+ pm_runtime_get_sync(&p->pdev->dev);
ret = clk_enable(p->clk);
if (ret) {
dev_err(&p->pdev->dev, "cannot enable clock\n");
+ pm_runtime_put_sync(&p->pdev->dev);
return ret;
}
@@ -141,8 +144,9 @@ static void sh_tmu_disable(struct sh_tmu_priv *p)
/* disable interrupts in TMU block */
sh_tmu_write(p, TCR, 0x0000);
- /* stop clock */
+ /* stop clock and mark device as idle */
clk_disable(p->clk);
+ pm_runtime_put_sync(&p->pdev->dev);
}
static void sh_tmu_set_next(struct sh_tmu_priv *p, unsigned long delta,
@@ -411,6 +415,7 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev)
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");
+ pm_runtime_enable(&pdev->dev);
return 0;
}
@@ -425,6 +430,9 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev)
kfree(p);
platform_set_drvdata(pdev, NULL);
}
+
+ if (!is_early_platform_device(pdev))
+ pm_runtime_enable(&pdev->dev);
return ret;
}