sdio: sdhci support for suspend mode PM features
Tested with an XO v1.5 from OLPC.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 5c3a176..dbf0543 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -501,6 +501,7 @@
{
struct sdhci_pci_chip *chip;
struct sdhci_pci_slot *slot;
+ mmc_pm_flag_t pm_flags = 0;
int i, ret;
chip = pci_get_drvdata(pdev);
@@ -519,6 +520,8 @@
sdhci_resume_host(chip->slots[i]->host);
return ret;
}
+
+ pm_flags |= slot->host->mmc->pm_flags;
}
if (chip->fixes && chip->fixes->suspend) {
@@ -531,9 +534,15 @@
}
pci_save_state(pdev);
- pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
- pci_disable_device(pdev);
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ if (pm_flags & MMC_PM_KEEP_POWER) {
+ if (pm_flags & MMC_PM_WAKE_SDIO_IRQ)
+ pci_enable_wake(pdev, PCI_D3hot, 1);
+ pci_set_power_state(pdev, PCI_D3hot);
+ } else {
+ pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ }
return 0;
}
@@ -653,6 +662,8 @@
goto unmap;
}
+ host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
+
ret = sdhci_add_host(host);
if (ret)
goto remove;