[PATCH V2] MMC: PM: add suspend/resume in atmel-mci

Nicolas Ferre
2011-06-30T13:49:41Z

Take care of slots while going to suspend state.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
V2: move to pm_ops

drivers/mmc/host/atmel-mci.c | 47 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index aa8039f..058f1842 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1878,10 +1878,57 @@ 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);
+ struct atmel_mci_slot *slot;
+ int i, ret;
+
+ for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {
+ slot = host->slot[i];
+ if (!slot)
+ continue;
+ ret = mmc_suspend_host(slot->mmc);
+ if (ret < 0) {
+ while (--i >= 0) {
+ slot = host->slot[i];
+ if (slot)
+ mmc_resume_host(host->slot[i]->mmc);
+ }
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int atmci_resume(struct device *dev)
+{
+ struct atmel_mci *host = dev_get_drvdata(dev);
+ struct atmel_mci_slot *slot;
+ int i, ret;
+
+ for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {
+ slot = host->slot[i];
+ if (!slot)
+ continue;
+ ret = mmc_resume_host(slot->mmc);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+static SIMPLE_DEV_PM_OPS(atmci_pm, atmci_suspend, atmci_resume);
+
+
static struct platform_driver atmci_driver = {
.remove = __exit_p(atmci_remove),
.driver = {
.name = "atmel_mci",
+ .pm = &atmci_pm,
},
};

--
1.7.3

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