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path: root/drivers/media/video/marvell-ccic/mmp-driver.c
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Diffstat (limited to 'drivers/media/video/marvell-ccic/mmp-driver.c')
-rw-r--r--drivers/media/video/marvell-ccic/mmp-driver.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/media/video/marvell-ccic/mmp-driver.c b/drivers/media/video/marvell-ccic/mmp-driver.c
index fb0b124b35f..0d64e2d7474 100644
--- a/drivers/media/video/marvell-ccic/mmp-driver.c
+++ b/drivers/media/video/marvell-ccic/mmp-driver.c
@@ -26,6 +26,7 @@
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/list.h>
+#include <linux/pm.h>
#include "mcam-core.h"
@@ -310,10 +311,44 @@ static int mmpcam_platform_remove(struct platform_device *pdev)
return mmpcam_remove(cam);
}
+/*
+ * Suspend/resume support.
+ */
+#ifdef CONFIG_PM
+
+static int mmpcam_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mmp_camera *cam = mmpcam_find_device(pdev);
+
+ if (state.event != PM_EVENT_SUSPEND)
+ return 0;
+ mccic_suspend(&cam->mcam);
+ return 0;
+}
+
+static int mmpcam_resume(struct platform_device *pdev)
+{
+ struct mmp_camera *cam = mmpcam_find_device(pdev);
+
+ /*
+ * Power up unconditionally just in case the core tries to
+ * touch a register even if nothing was active before; trust
+ * me, it's better this way.
+ */
+ mmpcam_power_up(&cam->mcam);
+ return mccic_resume(&cam->mcam);
+}
+
+#endif
+
static struct platform_driver mmpcam_driver = {
.probe = mmpcam_probe,
.remove = mmpcam_platform_remove,
+#ifdef CONFIG_PM
+ .suspend = mmpcam_suspend,
+ .resume = mmpcam_resume,
+#endif
.driver = {
.name = "mmp-camera",
.owner = THIS_MODULE