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Subject[PATCH v2 03/15] [media] mtk-mipicsi: add pm function
Date
This patch add PM function to enable/disable clk and larb.

Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
---
.../media/platform/mtk-mipicsi/mtk_mipicsi.c | 80 +++++++++++++++++++
1 file changed, 80 insertions(+)

diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
index e26bebe17fe5..ec4f6b503b32 100644
--- a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
+++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
@@ -464,6 +464,85 @@ static struct soc_camera_host_ops mtk_soc_camera_host_ops = {
.set_bus_param = mtk_mipicsi_set_bus_param,
};

+static int mtk_mipicsi_pm_suspend(struct device *dev)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(dev);
+ struct mtk_mipicsi_dev *mipicsi = NULL;
+ int ret = 0;
+ int i = 0;
+
+ mipicsi = container_of(ici, struct mtk_mipicsi_dev, soc_host);
+ if (mipicsi->soc_host.icd != NULL) {
+ struct v4l2_subdev *sd =
+ soc_camera_to_subdev(mipicsi->soc_host.icd);
+
+ ret = v4l2_subdev_call(sd, core, s_power, 0);
+ if (ret == -ENOIOCTLCMD)
+ ret = 0;
+ }
+
+ /* close digtal and analog clock */
+ for (i = 0; i < mipicsi->clk_num; ++i)
+ clk_disable_unprepare(mipicsi->clk[i]);
+
+ if (mipicsi->larb_pdev != NULL)
+ mtk_smi_larb_put(mipicsi->larb_pdev);
+
+ return ret;
+}
+
+static int mtk_mipicsi_suspend(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return mtk_mipicsi_pm_suspend(dev);
+}
+
+static int mtk_mipicsi_pm_resume(struct device *dev)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(dev);
+ struct mtk_mipicsi_dev *mipicsi =
+ container_of(ici, struct mtk_mipicsi_dev, soc_host);
+ int ret = 0;
+ int i = 0;
+
+ if (mipicsi->soc_host.icd != NULL) {
+ struct v4l2_subdev *sd =
+ soc_camera_to_subdev(mipicsi->soc_host.icd);
+
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret == -ENOIOCTLCMD)
+ ret = 0;
+ }
+
+ if (mipicsi->larb_pdev != NULL) {
+ ret = mtk_smi_larb_get(mipicsi->larb_pdev);
+ if (ret != 0)
+ return ret;
+ }
+
+ /* enable digtal clock */
+ for (i = 0; i < mipicsi->clk_num; ++i)
+ (void)clk_prepare_enable(mipicsi->clk[i]);
+
+ return ret;
+}
+
+static int mtk_mipicsi_resume(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return mtk_mipicsi_pm_resume(dev);
+}
+
+static const struct dev_pm_ops mtk_mipicsi_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(mtk_mipicsi_suspend, mtk_mipicsi_resume)
+ SET_RUNTIME_PM_OPS(mtk_mipicsi_pm_suspend,
+ mtk_mipicsi_pm_resume, NULL)
+};
+
static int seninf_mux_camsv_node_parse(struct mtk_mipicsi_dev *mipicsi,
int index)
{
@@ -756,6 +835,7 @@ static const struct of_device_id mtk_mipicsi_of_match[] = {
static struct platform_driver mtk_mipicsi_driver = {
.driver = {
.name = MTK_MIPICSI_DRV_NAME,
+ .pm = &mtk_mipicsi_pm,
.of_match_table = of_match_ptr(mtk_mipicsi_of_match),
},
.probe = mtk_mipicsi_probe,
--
2.18.0
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