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authorKevin Liu <kliu5@marvell.com>2013-02-01 17:48:30 +0800
committerChris Ball <cjb@laptop.org>2013-02-24 14:37:13 -0500
commitbb691ae464b77d30e74c66480e98d74e88d6b194 (patch)
treec49997ac0975f3e20d43725ea233e48f910ac651 /drivers/mmc
parentf5c2758fbb3095dc0fe4725e4a2eaec3580e1eba (diff)
downloadblackbird-op-linux-bb691ae464b77d30e74c66480e98d74e88d6b194.tar.gz
blackbird-op-linux-bb691ae464b77d30e74c66480e98d74e88d6b194.zip
mmc: sdhci-pxav3: add pm runtime support
Signed-off-by: Kevin Liu <kliu5@marvell.com> Signed-off-by: Jialing Fu <jlfu@marvell.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-pxav3.c96
1 files changed, 95 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index f09877fcc3ec..a0cdbc570a83 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -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,
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