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>

1 files changed, 14 insertions, 3 deletions

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 5c3a1767770a..dbf054315fe2 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -501,6 +501,7 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
 {
         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 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
                                 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 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
         }
 
         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 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
                         goto unmap;
         }
 
+        host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
+
         ret = sdhci_add_host(host);
         if (ret)
                 goto remove;