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mmc: sdhci-of-dwcmshc: Add runtime PM support

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Change-Id: I27a9e60079a9f5207d5f00d2251e9c499447af1c
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Shawn Lin
2020-11-24 09:48:13 +08:00
committed by Tao Huang
parent 6a9eb7b334
commit 839101df49
1 changed files with 53 additions and 2 deletions
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55
drivers/mmc/host/sdhci-of-dwcmshc.c
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@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
#include "sdhci-pltfm.h"
@@ -323,6 +324,13 @@ static int dwcmshc_probe(struct platform_device *pdev)
if (err)
goto err_clk;
pm_runtime_get_noresume(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
return 0;
err_clk:
@@ -394,10 +402,53 @@ static int dwcmshc_resume(struct device *dev)
return sdhci_resume_host(host);
}
static int dwcmshc_runtime_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = sdhci_runtime_suspend_host(host);
clk_disable_unprepare(pltfm_host->clk);
if (!IS_ERR(priv->bus_clk))
clk_disable_unprepare(priv->bus_clk);
clk_bulk_disable_unprepare(ROCKCHIP_MAX_CLKS, priv->rockchip_clks);
return ret;
}
static int dwcmshc_runtime_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = clk_prepare_enable(pltfm_host->clk);
if (ret)
return ret;
if (!IS_ERR(priv->bus_clk)) {
ret = clk_prepare_enable(priv->bus_clk);
if (ret)
return ret;
}
ret = clk_bulk_prepare_enable(ROCKCHIP_MAX_CLKS, priv->rockchip_clks);
if (ret)
return ret;
return sdhci_runtime_resume_host(host);
}
#endif
static SIMPLE_DEV_PM_OPS(dwcmshc_pmops, dwcmshc_suspend, dwcmshc_resume);
static const struct dev_pm_ops dwcmshc_pmops = {
SET_SYSTEM_SLEEP_PM_OPS(dwcmshc_suspend, dwcmshc_resume)
SET_RUNTIME_PM_OPS(dwcmshc_runtime_suspend, dwcmshc_runtime_resume, NULL)
};
MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids);
static struct platform_driver sdhci_dwcmshc_driver = {