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clk: qcom: dispcc-sm8250: use runtime PM for the clock controller

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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>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210829154757.784699-4-dmitry.baryshkov@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2021-08-29 18:47:52 +03:00 committed by Stephen Boyd
parent a3bb8a70e7
commit 6158b94ec8
1 changed files with 25 additions and 2 deletions
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27
drivers/clk/qcom/dispcc-sm8250.c
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@ -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 <linux/reset-controller.h>
@ -1228,13 +1229,31 @@ static const struct of_device_id disp_cc_sm8250_match_table[] = {
};
MODULE_DEVICE_TABLE(of, disp_cc_sm8250_match_table);
static void disp_cc_sm8250_pm_runtime_disable(void *data)
{
pm_runtime_disable(data);
}
static int disp_cc_sm8250_probe(struct platform_device *pdev)
{
struct regmap *regmap;
int ret;
pm_runtime_enable(&pdev->dev);
ret = devm_add_action_or_reset(&pdev->dev, disp_cc_sm8250_pm_runtime_disable, &pdev->dev);
if (ret)
return ret;
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret)
return ret;
regmap = qcom_cc_map(pdev, &disp_cc_sm8250_desc);
if (IS_ERR(regmap))
if (IS_ERR(regmap)) {
pm_runtime_put(&pdev->dev);
return PTR_ERR(regmap);
}
/* note: trion == lucid, except for the prepare() op */
BUILD_BUG_ON(CLK_ALPHA_PLL_TYPE_TRION != CLK_ALPHA_PLL_TYPE_LUCID);
@ -1259,7 +1278,11 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
/* DISP_CC_XO_CLK always-on */
regmap_update_bits(regmap, 0x605c, BIT(0), BIT(0));
return qcom_cc_really_probe(pdev, &disp_cc_sm8250_desc, regmap);
ret = qcom_cc_really_probe(pdev, &disp_cc_sm8250_desc, regmap);
pm_runtime_put(&pdev->dev);
return ret;
}
static struct platform_driver disp_cc_sm8250_driver = {