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mmc: sdio: add power_restore support

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Add a power_restore handler to the SDIO bus ops,
in order to support waking up SDIO cards that
were powered off by runtime pm.

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 13:54:07 +02:00 committed by Chris Ball
parent 12ae637f08
commit d3fe37b1a1
1 changed files with 18 additions and 0 deletions
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18
drivers/mmc/core/sdio.c
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@ -638,11 +638,29 @@ static int mmc_sdio_resume(struct mmc_host *host)
return err;
}
static int mmc_sdio_power_restore(struct mmc_host *host)
{
int ret;
BUG_ON(!host);
BUG_ON(!host->card);
mmc_claim_host(host);
ret = mmc_sdio_init_card(host, host->ocr, host->card,
(host->pm_flags & MMC_PM_KEEP_POWER));
if (!ret && host->sdio_irqs)
mmc_signal_sdio_irq(host);
mmc_release_host(host);
return ret;
}
static const struct mmc_bus_ops mmc_sdio_ops = {
.remove = mmc_sdio_remove,
.detect = mmc_sdio_detect,
.suspend = mmc_sdio_suspend,
.resume = mmc_sdio_resume,
.power_restore = mmc_sdio_power_restore,
};