94 lines
2.4 KiB
Diff
94 lines
2.4 KiB
Diff
From ce8180045daea68c45ba5bd2495885410b7b9dc8 Mon Sep 17 00:00:00 2001
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From: Shawn Lin <shawn.lin@rock-chips.com>
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Date: Tue, 31 Jan 2023 08:46:30 +0800
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Subject: [PATCH 2/3] mmc: sdhci-of-dwcmshc: Add runtime PM support
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This patch adds runtime PM support.
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Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
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---
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drivers/mmc/host/sdhci-of-dwcmshc.c | 51 ++++++++++++++++++++++++++++-
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1 file changed, 50 insertions(+), 1 deletion(-)
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--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
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+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
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@@ -15,6 +15,7 @@
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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+#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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#include <linux/sizes.h>
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@@ -546,6 +547,13 @@ static int dwcmshc_probe(struct platform
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if (err)
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goto err_setup_host;
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+ pm_runtime_get_noresume(&pdev->dev);
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+ pm_runtime_set_active(&pdev->dev);
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+ pm_runtime_enable(&pdev->dev);
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+ pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
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+ pm_runtime_use_autosuspend(&pdev->dev);
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+ pm_runtime_put_autosuspend(&pdev->dev);
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+
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return 0;
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err_setup_host:
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@@ -575,6 +583,11 @@ static int dwcmshc_remove(struct platfor
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if (rk_priv)
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clk_bulk_disable_unprepare(RK35xx_MAX_CLKS,
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rk_priv->rockchip_clks);
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+
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+ pm_runtime_get_sync(&pdev->dev);
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+ pm_runtime_disable(&pdev->dev);
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+ pm_runtime_put_noidle(&pdev->dev);
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+
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sdhci_pltfm_free(pdev);
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return 0;
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@@ -633,7 +646,43 @@ static int dwcmshc_resume(struct device
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}
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#endif
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-static SIMPLE_DEV_PM_OPS(dwcmshc_pmops, dwcmshc_suspend, dwcmshc_resume);
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+#ifdef CONFIG_PM
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+static int dwcmshc_runtime_suspend(struct device *dev)
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+{
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+ struct sdhci_host *host = dev_get_drvdata(dev);
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+ u16 data;
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+ int ret;
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+
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+ ret = sdhci_runtime_suspend_host(host);
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+ if (ret)
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+ return ret;
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+
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+ data = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
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+ data &= ~SDHCI_CLOCK_CARD_EN;
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+ sdhci_writew(host, data, SDHCI_CLOCK_CONTROL);
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+
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+ return 0;
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+}
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+
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+static int dwcmshc_runtime_resume(struct device *dev)
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+{
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+ struct sdhci_host *host = dev_get_drvdata(dev);
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+ u16 data;
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+
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+ data = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
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+ data |= SDHCI_CLOCK_CARD_EN;
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+ sdhci_writew(host, data, SDHCI_CLOCK_CONTROL);
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+
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+ return sdhci_runtime_resume_host(host, 0);
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+}
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+#endif
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+
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+static const struct dev_pm_ops dwcmshc_pmops = {
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+ SET_SYSTEM_SLEEP_PM_OPS(dwcmshc_suspend,
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+ dwcmshc_resume)
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+ SET_RUNTIME_PM_OPS(dwcmshc_runtime_suspend,
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+ dwcmshc_runtime_resume, NULL)
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+};
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static struct platform_driver sdhci_dwcmshc_driver = {
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.driver = {
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