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Commit 5c2f2b9b authored by Nicolas Ferre's avatar Nicolas Ferre Committed by Chris Ball
Browse files

mmc: atmel-mci: add suspend/resume support 



Take care of slots while going to suspend state.

Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 0d013bcf

drivers/mmc/host/atmel-mci.c

+63 −0
Original line number Diff line number Diff line
@@ -203,6 +203,7 @@ struct atmel_mci_slot { 
#define ATMCI_CARD_PRESENT	0

#define ATMCI_CARD_NEED_INIT	1

#define ATMCI_SHUTDOWN		2

#define ATMCI_SUSPENDED		3



	int			detect_pin;

	int			wp_pin;
@@ -1878,10 +1879,72 @@ static int __exit atmci_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

static int atmci_suspend(struct device *dev)

{

	struct atmel_mci *host = dev_get_drvdata(dev);

	int i;



	 for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {

		struct atmel_mci_slot *slot = host->slot[i];

		int ret;



		if (!slot)

			continue;

		ret = mmc_suspend_host(slot->mmc);

		if (ret < 0) {

			while (--i >= 0) {

				slot = host->slot[i];

				if (slot

				&& test_bit(ATMCI_SUSPENDED, &slot->flags)) {

					mmc_resume_host(host->slot[i]->mmc);

					clear_bit(ATMCI_SUSPENDED, &slot->flags);

				}

			}

			return ret;

		} else {

			set_bit(ATMCI_SUSPENDED, &slot->flags);

		}

	}



	return 0;

}



static int atmci_resume(struct device *dev)

{

	struct atmel_mci *host = dev_get_drvdata(dev);

	int i;

	int ret = 0;



	for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {

		struct atmel_mci_slot *slot = host->slot[i];

		int err;



		slot = host->slot[i];

		if (!slot)

			continue;

		if (!test_bit(ATMCI_SUSPENDED, &slot->flags))

			continue;

		err = mmc_resume_host(slot->mmc);

		if (err < 0)

			ret = err;

		else

			clear_bit(ATMCI_SUSPENDED, &slot->flags);

	}



	return ret;

}

static SIMPLE_DEV_PM_OPS(atmci_pm, atmci_suspend, atmci_resume);

#define ATMCI_PM_OPS	(&atmci_pm)

#else

#define ATMCI_PM_OPS	NULL

#endif



static struct platform_driver atmci_driver = {

	.remove		= __exit_p(atmci_remove),

	.driver		= {

		.name		= "atmel_mci",

		.pm		= ATMCI_PM_OPS,

	},

};