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mmc: sdhci-pxav3: add pm runtime support

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Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Jialing Fu <jlfu@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Kevin Liu 2013-02-01 17:48:30 +08:00 committed by Chris Ball
parent f5c2758fbb
commit bb691ae464
1 changed files with 95 additions and 1 deletions
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96
drivers/mmc/host/sdhci-pxav3.c
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@ -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,