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PM: add runtime PM support to MMCI

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Add runtime PM support to the MMCI primecell driver, making use of
the core primecell bus runtime PM support.

Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-08-14 09:17:05 +01:00
parent 92b97f0aac
commit 1c3be369c5
1 changed files with 12 additions and 0 deletions
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12
drivers/mmc/host/mmci.c
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@ -29,6 +29,7 @@
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/amba/mmci.h>
#include <linux/pm_runtime.h>
#include <asm/div64.h>
#include <asm/io.h>
@ -170,6 +171,7 @@ mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
* back into the driver...
*/
spin_unlock(&host->lock);
pm_runtime_put(mmc_dev(host->mmc));
mmc_request_done(host->mmc, mrq);
spin_lock(&host->lock);
}
@ -984,6 +986,8 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
return;
}
pm_runtime_get_sync(mmc_dev(mmc));
spin_lock_irqsave(&host->lock, flags);
host->mrq = mrq;
@ -1327,6 +1331,8 @@ static int __devinit mmci_probe(struct amba_device *dev,
mmci_dma_setup(host);
pm_runtime_put(&dev->dev);
mmc_add_host(mmc);
return 0;
@ -1364,6 +1370,12 @@ static int __devexit mmci_remove(struct amba_device *dev)
if (mmc) {
struct mmci_host *host = mmc_priv(mmc);
/*
* Undo pm_runtime_put() in probe. We use the _sync
* version here so that we can access the primecell.
*/
pm_runtime_get_sync(&dev->dev);
mmc_remove_host(mmc);
writel(0, host->base + MMCIMASK0);