clk: qcom: videocc-sm8150: Add runtime PM support

Add runtime PM support to ensure the supply rails are enabled
when necessary.

Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20231201-videocc-8150-v3-4-56bec3a5e443@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/drivers/clk/qcom/videocc-sm8150.c b/drivers/clk/qcom/videocc-sm8150.c
index 52a9a453a14326a53444d5c7e4c6ae82d80dd245..f1456eaa87c401ec1a2cee9deb1b604333116882 100644 (file)
--- a/drivers/clk/qcom/videocc-sm8150.c
+++ b/drivers/clk/qcom/videocc-sm8150.c
@@ -6,6 +6,7 @@
 #include <linux/clk-provider.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 
 #include <dt-bindings/clock/qcom,videocc-sm8150.h>
@@ -240,17 +241,32 @@ MODULE_DEVICE_TABLE(of, video_cc_sm8150_match_table);
 static int video_cc_sm8150_probe(struct platform_device *pdev)
 {
        struct regmap *regmap;
+       int ret;
+
+       ret = devm_pm_runtime_enable(&pdev->dev);
+       if (ret)
+               return ret;
+
+       ret = pm_runtime_resume_and_get(&pdev->dev);
+       if (ret)
+               return ret;
 
        regmap = qcom_cc_map(pdev, &video_cc_sm8150_desc);
-       if (IS_ERR(regmap))
+       if (IS_ERR(regmap)) {
+               pm_runtime_put_sync(&pdev->dev);
                return PTR_ERR(regmap);
+       }
 
        clk_trion_pll_configure(&video_pll0, regmap, &video_pll0_config);
 
        /* Keep VIDEO_CC_XO_CLK ALWAYS-ON */
        regmap_update_bits(regmap, 0x984, 0x1, 0x1);
 
-       return qcom_cc_really_probe(pdev, &video_cc_sm8150_desc, regmap);
+       ret = qcom_cc_really_probe(pdev, &video_cc_sm8150_desc, regmap);
+
+       pm_runtime_put_sync(&pdev->dev);
+
+       return ret;
 }
 
 static struct platform_driver video_cc_sm8150_driver = {