linux-kernel - [PATCH v1] clk: qcom: lpasscc: Introduce pm autosuspend for SC7180

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Date:   Fri, 20 Nov 2020 22:10:17 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette   <mturquette@...libre.com>
Cc:     David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Taniya Das <tdas@...eaurora.org>
Subject: [PATCH v1] clk: qcom: lpasscc: Introduce pm autosuspend for SC7180

The LPASSCC driver's suspend/resume is invoked multiple number of times
and thus allow the device to autosuspend for 500ms.

Signed-off-by: Taniya Das <tdas@...eaurora.org>
---
 drivers/clk/qcom/lpasscorecc-sc7180.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/lpasscorecc-sc7180.c b/drivers/clk/qcom/lpasscorecc-sc7180.c
index 9081649..2e0ecc3 100644
--- a/drivers/clk/qcom/lpasscorecc-sc7180.c
+++ b/drivers/clk/qcom/lpasscorecc-sc7180.c
@@ -370,7 +370,10 @@ static int lpass_create_pm_clks(struct platform_device *pdev)
 {
 	int ret;

+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 500);
 	pm_runtime_enable(&pdev->dev);
+
 	ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_runtime_disable, &pdev->dev);
 	if (ret)
 		return ret;
@@ -423,7 +426,12 @@ static int lpass_core_cc_sc7180_probe(struct platform_device *pdev)
 	clk_fabia_pll_configure(&lpass_lpaaudio_dig_pll, regmap,
 				&lpass_lpaaudio_dig_pll_config);

-	return qcom_cc_really_probe(pdev, &lpass_core_cc_sc7180_desc, regmap);
+	ret = qcom_cc_really_probe(pdev, &lpass_core_cc_sc7180_desc, regmap);
+
+	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_put_autosuspend(&pdev->dev);
+
+	return ret;
 }

 static int lpass_hm_core_probe(struct platform_device *pdev)
--
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