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authorQipeng Zha <qipeng.zha@intel.com>2015-10-26 12:58:27 +0200
committerThierry Reding <thierry.reding@gmail.com>2015-11-06 14:34:13 +0100
commitf080be27d7d9333e4815655a2cedab91c3aa7acc (patch)
tree102b1929216c09c2e26e7ecc9dc93e023c549635 /drivers/pwm/pwm-lpss-platform.c
parent03f00e5311d5d0d3ac716121865cb967259980ca (diff)
pwm: lpss: Add support for runtime PM
To be able to save some power when PWM is not in use, add support for runtime PM for this driver. This also allows the platform to transition to low power S0ix states when the system is idle. Signed-off-by: Huiquan Zhong <huiquan.zhong@intel.com> Signed-off-by: Qipeng Zha <qipeng.zha@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-lpss-platform.c')
-rw-r--r--drivers/pwm/pwm-lpss-platform.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c
index a914aacf6757..54433fc6d1a4 100644
--- a/drivers/pwm/pwm-lpss-platform.c
+++ b/drivers/pwm/pwm-lpss-platform.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include "pwm-lpss.h"
@@ -36,6 +37,10 @@ static int pwm_lpss_probe_platform(struct platform_device *pdev)
return PTR_ERR(lpwm);
platform_set_drvdata(pdev, lpwm);
+
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
return 0;
}
@@ -43,6 +48,7 @@ static int pwm_lpss_remove_platform(struct platform_device *pdev)
{
struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
+ pm_runtime_disable(&pdev->dev);
return pwm_lpss_remove(lpwm);
}