diff options
| author | Lubomir Rintel <lkundrak@v3.sk> | 2020-08-18 01:08:50 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-08-29 09:10:02 +0300 |
| commit | 55cd34524aa37601a20cdb0f40c2047c57aa657b (patch) | |
| tree | 316cc522378d52ca59fc08d5add06e84deb76e7a /drivers/media/platform/marvell-ccic/mmp-driver.c | |
| parent | 9ac7400f49213ec107cc759bad5ab8a6f64684d6 (diff) | |
| download | linux-55cd34524aa37601a20cdb0f40c2047c57aa657b.tar.xz | |
media: marvell-ccic: add support for runtime PM
On MMP3, the camera block lives on a separate power island. We want to
turn it off if the CCIC is not in use to conserve power.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/platform/marvell-ccic/mmp-driver.c')
| -rw-r--r-- | drivers/media/platform/marvell-ccic/mmp-driver.c | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c b/drivers/media/platform/marvell-ccic/mmp-driver.c index 78263e746cad..c4b28a00a3a2 100644 --- a/drivers/media/platform/marvell-ccic/mmp-driver.c +++ b/drivers/media/platform/marvell-ccic/mmp-driver.c @@ -20,6 +20,7 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/io.h> #include <linux/list.h> #include <linux/pm.h> @@ -274,6 +275,7 @@ static int mmpcam_probe(struct platform_device *pdev) if (ret) goto out; + pm_runtime_enable(&pdev->dev); return 0; out: fwnode_handle_put(mcam->asd.match.fwnode); @@ -288,6 +290,7 @@ static int mmpcam_remove(struct mmp_camera *cam) struct mcam_camera *mcam = &cam->mcam; mccic_shutdown(mcam); + pm_runtime_force_suspend(mcam->dev); return 0; } @@ -304,11 +307,40 @@ static int mmpcam_platform_remove(struct platform_device *pdev) * Suspend/resume support. */ +static int mmpcam_runtime_resume(struct device *dev) +{ + struct mmp_camera *cam = dev_get_drvdata(dev); + struct mcam_camera *mcam = &cam->mcam; + unsigned int i; + + for (i = 0; i < NR_MCAM_CLK; i++) { + if (!IS_ERR(mcam->clk[i])) + clk_prepare_enable(mcam->clk[i]); + } + + return 0; +} + +static int mmpcam_runtime_suspend(struct device *dev) +{ + struct mmp_camera *cam = dev_get_drvdata(dev); + struct mcam_camera *mcam = &cam->mcam; + int i; + + for (i = NR_MCAM_CLK - 1; i >= 0; i--) { + if (!IS_ERR(mcam->clk[i])) + clk_disable_unprepare(mcam->clk[i]); + } + + return 0; +} + static int mmpcam_suspend(struct device *dev) { struct mmp_camera *cam = dev_get_drvdata(dev); - mccic_suspend(&cam->mcam); + if (!pm_runtime_suspended(dev)) + mccic_suspend(&cam->mcam); return 0; } @@ -316,10 +348,15 @@ static int mmpcam_resume(struct device *dev) { struct mmp_camera *cam = dev_get_drvdata(dev); - return mccic_resume(&cam->mcam); + if (!pm_runtime_suspended(dev)) + return mccic_resume(&cam->mcam); + return 0; } -static SIMPLE_DEV_PM_OPS(mmpcam_pm_ops, mmpcam_suspend, mmpcam_resume); +static const struct dev_pm_ops mmpcam_pm_ops = { + SET_RUNTIME_PM_OPS(mmpcam_runtime_suspend, mmpcam_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(mmpcam_suspend, mmpcam_resume) +}; static const struct of_device_id mmpcam_of_match[] = { { .compatible = "marvell,mmp2-ccic", }, |