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mmc: sdio: enable runtime PM for SDIO functions

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Enable runtime PM for SDIO functions.

SDIO functions are initialized with a disabled runtime PM state,
and are set active (and their usage count is incremented)
only before potential drivers are probed.

SDIO function drivers that support runtime PM should call
pm_runtime_put_noidle() in their probe routine, and
pm_runtime_get_noresume() in their remove routine (very
similarly to PCI drivers).

In case a matching driver does not support runtime PM, power will
always be kept high (since the usage count is positive).

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Ohad Ben-Cohen
2010-10-02 13:54:11 +02:00
committed by Chris Ball
parent 81968561bd
commit 40bba0c1ca
2 changed files with 40 additions and 3 deletions
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5
drivers/mmc/core/sdio.c
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@@ -734,6 +734,11 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
err = sdio_init_func(host->card, i + 1);
if (err)
goto remove;
/*
* Enable Runtime PM for this func
*/
pm_runtime_enable(&card->sdio_func[i]->dev);
}
mmc_release_host(host);