Messages in this thread Patch in this message | | | From | Dmitry Baryshkov <> | Subject | [PATCH v5 5/9] clk: qcom: videocc-sm8250: use runtime PM for the clock controller | Date | Sun, 18 Jul 2021 13:48:57 +0300 |
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On sm8250 dispcc and videocc registers are powered up by the MMCX power domain. Use runtime PM calls to make sure that required power domain is powered on while we access clock controller's registers.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/clk/qcom/videocc-sm8250.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/qcom/videocc-sm8250.c b/drivers/clk/qcom/videocc-sm8250.c index 7b435a1c2c4b..d996b76f4e30 100644 --- a/drivers/clk/qcom/videocc-sm8250.c +++ b/drivers/clk/qcom/videocc-sm8250.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-sm8250.h> @@ -367,10 +368,21 @@ MODULE_DEVICE_TABLE(of, video_cc_sm8250_match_table); static int video_cc_sm8250_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_sm8250_desc); - if (IS_ERR(regmap)) + if (IS_ERR(regmap)) { + pm_runtime_put(&pdev->dev); return PTR_ERR(regmap); + } clk_lucid_pll_configure(&video_pll0, regmap, &video_pll0_config); clk_lucid_pll_configure(&video_pll1, regmap, &video_pll1_config); @@ -379,7 +391,11 @@ static int video_cc_sm8250_probe(struct platform_device *pdev) regmap_update_bits(regmap, 0xe58, BIT(0), BIT(0)); regmap_update_bits(regmap, 0xeec, BIT(0), BIT(0)); - return qcom_cc_really_probe(pdev, &video_cc_sm8250_desc, regmap); + ret = qcom_cc_really_probe(pdev, &video_cc_sm8250_desc, regmap); + + pm_runtime_put(&pdev->dev); + + return ret; } static struct platform_driver video_cc_sm8250_driver = { -- 2.30.2
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