[PATCH 05/17] mmc: mmci: Put the device into low power state at system suspend
From: Ulf Hansson <hidden>
Date: 2014-02-04 15:59:38
Also in:
linux-i2c, linux-mmc, linux-spi, lkml
Subsystem:
arm primecell mmci pl180/1 driver, multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Russell King, Ulf Hansson, Linus Torvalds
Due to the available runtime PM callbacks, we are now able to put our device into low power state at system suspend. Earlier we could not accomplish this without trusting a power domain for the device to take care of it. Now we are able to cope with scenarios both with and without a power domain. Cc: Russell King <redacted> Signed-off-by: Ulf Hansson <redacted> --- drivers/mmc/host/mmci.c | 45 +++++++++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 20 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index c88da1c..074e0cb 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c@@ -1723,33 +1723,38 @@ static int mmci_remove(struct amba_device *dev) return 0; } -#ifdef CONFIG_SUSPEND -static int mmci_suspend(struct device *dev) +#ifdef CONFIG_PM_SLEEP +static int mmci_suspend_late(struct device *dev) { - struct amba_device *adev = to_amba_device(dev); - struct mmc_host *mmc = amba_get_drvdata(adev); + int ret = 0; - if (mmc) { - struct mmci_host *host = mmc_priv(mmc); - pm_runtime_get_sync(dev); - writel(0, host->base + MMCIMASK0); - } + if (pm_runtime_status_suspended(dev)) + return 0; - return 0; + if (dev->pm_domain && dev->pm_domain->ops.runtime_suspend) + ret = dev->pm_domain->ops.runtime_suspend(dev); + else + ret = dev->bus->pm->runtime_suspend(dev); + + if (!ret) + pm_runtime_set_suspended(dev); + + return ret; } -static int mmci_resume(struct device *dev) +static int mmci_resume_early(struct device *dev) { - struct amba_device *adev = to_amba_device(dev); - struct mmc_host *mmc = amba_get_drvdata(adev); + int ret = 0; - if (mmc) { - struct mmci_host *host = mmc_priv(mmc); - writel(MCI_IRQENABLE, host->base + MMCIMASK0); - pm_runtime_put(dev); - } + if (pm_runtime_status_suspended(dev)) + return 0; - return 0; + if (dev->pm_domain && dev->pm_domain->ops.runtime_resume) + ret = dev->pm_domain->ops.runtime_resume(dev); + else + ret = dev->bus->pm->runtime_resume(dev); + + return ret; } #endif
@@ -1820,7 +1825,7 @@ static int mmci_runtime_resume(struct device *dev) #endif static const struct dev_pm_ops mmci_dev_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume) + SET_LATE_SYSTEM_SLEEP_PM_OPS(mmci_suspend_late, mmci_resume_early) SET_PM_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL) };
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1.7.9.5