sdhci: Specific quirk vor VIA SDHCI controller in VX855ES

The SDHCI controller found in the VX855ES requires 10ms
delay between applying power and applying clock.

This issue has been discovered and documented by the OLPC XO1.5 team.

Signed-off-by: Harald Welte <HaraldWelte@viatech.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 65be27995d5c..2f15cc17d887 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -284,6 +284,18 @@ static const struct sdhci_pci_fixes sdhci_jmicron = {
         .resume         = jmicron_resume,
 };
 
+static int via_probe(struct sdhci_pci_chip *chip)
+{
+        if (chip->pdev->revision == 0x10)
+                chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
+
+        return 0;
+}
+
+static const struct sdhci_pci_fixes sdhci_via = {
+        .probe          = via_probe,
+};
+
 static const struct pci_device_id pci_ids[] __devinitdata = {
         {
                 .vendor         = PCI_VENDOR_ID_RICOH,
@@ -349,6 +361,14 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
                 .driver_data    = (kernel_ulong_t)&sdhci_jmicron,
         },
 
+        {
+                .vendor         = PCI_VENDOR_ID_VIA,
+                .device         = 0x95d0,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_via,
+        },
+
         {       /* Generic SD host controller */
                 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
         },