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Commit bb691ae4 authored by Kevin Liu's avatar Kevin Liu Committed by Chris Ball
Browse files

mmc: sdhci-pxav3: add pm runtime support 



Signed-off-by: default avatarKevin Liu <kliu5@marvell.com>
Signed-off-by: default avatarJialing Fu <jlfu@marvell.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent f5c2758f

drivers/mmc/host/sdhci-pxav3.c

+95 −1
Original line number Diff line number Diff line
@@ -32,10 +32,14 @@ 
#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/of_gpio.h>

#include <linux/pm.h>

#include <linux/pm_runtime.h>



#include "sdhci.h"

#include "sdhci-pltfm.h"



#define PXAV3_RPM_DELAY_MS     50



#define SD_CLOCK_BURST_SIZE_SETUP		0x10A

#define SDCLK_SEL	0x100

#define SDCLK_DELAY_SHIFT	9
@@ -296,9 +300,18 @@ static int sdhci_pxav3_probe(struct platform_device *pdev) 


	sdhci_get_of_property(pdev);



	pm_runtime_set_active(&pdev->dev);

	pm_runtime_enable(&pdev->dev);

	pm_runtime_set_autosuspend_delay(&pdev->dev, PXAV3_RPM_DELAY_MS);

	pm_runtime_use_autosuspend(&pdev->dev);

	pm_suspend_ignore_children(&pdev->dev, 1);

	pm_runtime_get_noresume(&pdev->dev);



	ret = sdhci_add_host(host);

	if (ret) {

		dev_err(&pdev->dev, "failed to add host\n");

		pm_runtime_forbid(&pdev->dev);

		pm_runtime_disable(&pdev->dev);

		goto err_add_host;

	}
@@ -311,6 +324,8 @@ static int sdhci_pxav3_probe(struct platform_device *pdev) 
		device_init_wakeup(&pdev->dev, 0);

	}



	pm_runtime_put_autosuspend(&pdev->dev);



	return 0;



err_add_host:
@@ -329,7 +344,9 @@ static int sdhci_pxav3_remove(struct platform_device *pdev) 
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	struct sdhci_pxa *pxa = pltfm_host->priv;



	pm_runtime_get_sync(&pdev->dev);

	sdhci_remove_host(host, 1);

	pm_runtime_disable(&pdev->dev);



	clk_disable_unprepare(pltfm_host->clk);

	clk_put(pltfm_host->clk);
@@ -342,6 +359,83 @@ static int sdhci_pxav3_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int sdhci_pxav3_suspend(struct device *dev)

{

	int ret;

	struct sdhci_host *host = dev_get_drvdata(dev);



	pm_runtime_get_sync(dev);

	ret = sdhci_suspend_host(host);

	pm_runtime_mark_last_busy(dev);

	pm_runtime_put_autosuspend(dev);



	return ret;

}



static int sdhci_pxav3_resume(struct device *dev)

{

	int ret;

	struct sdhci_host *host = dev_get_drvdata(dev);



	pm_runtime_get_sync(dev);

	ret = sdhci_resume_host(host);

	pm_runtime_mark_last_busy(dev);

	pm_runtime_put_autosuspend(dev);



	return ret;

}

#endif



#ifdef CONFIG_PM_RUNTIME

static int sdhci_pxav3_runtime_suspend(struct device *dev)

{

	struct sdhci_host *host = dev_get_drvdata(dev);

	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	unsigned long flags;



	if (pltfm_host->clk) {

		spin_lock_irqsave(&host->lock, flags);

		host->runtime_suspended = true;

		spin_unlock_irqrestore(&host->lock, flags);



		clk_disable_unprepare(pltfm_host->clk);

	}



	return 0;

}



static int sdhci_pxav3_runtime_resume(struct device *dev)

{

	struct sdhci_host *host = dev_get_drvdata(dev);

	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	unsigned long flags;



	if (pltfm_host->clk) {

		clk_prepare_enable(pltfm_host->clk);



		spin_lock_irqsave(&host->lock, flags);

		host->runtime_suspended = false;

		spin_unlock_irqrestore(&host->lock, flags);

	}



	return 0;

}

#endif



#ifdef CONFIG_PM

static const struct dev_pm_ops sdhci_pxav3_pmops = {

	SET_SYSTEM_SLEEP_PM_OPS(sdhci_pxav3_suspend, sdhci_pxav3_resume)

	SET_RUNTIME_PM_OPS(sdhci_pxav3_runtime_suspend,

		sdhci_pxav3_runtime_resume, NULL)

};



#define SDHCI_PXAV3_PMOPS (&sdhci_pxav3_pmops)



#else

#define SDHCI_PXAV3_PMOPS NULL

#endif



static struct platform_driver sdhci_pxav3_driver = {

	.driver		= {

		.name	= "sdhci-pxav3",
@@ -349,7 +443,7 @@ static struct platform_driver sdhci_pxav3_driver = { 
		.of_match_table = sdhci_pxav3_of_match,

#endif

		.owner	= THIS_MODULE,

		.pm	= SDHCI_PLTFM_PMOPS,

		.pm	= SDHCI_PXAV3_PMOPS,

	},

	.probe		= sdhci_pxav3_probe,

	.remove		= sdhci_pxav3_remove,