2014-11-04 09:28:10

by Wan Zongshun

[permalink] [raw]
Subject: [PATCH] mmc: Add a quirk for AMD SD controller doesn't support HS200

AMD SD controller support the SDR104 mode, but caps2 can not
be promoted to support hs200 for eMMC.

Signed-off-by: Vincent Wan <[email protected]>
---
drivers/mmc/host/sdhci-pci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 8f5c998..6b4e84c 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -652,8 +652,10 @@ static int amd_probe(struct sdhci_pci_chip *chip)
smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);

- if (smbus_dev && (smbus_dev->revision < 0x51))
+ if (smbus_dev && (smbus_dev->revision < 0x51)) {
chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
+ chip->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
+ }

return 0;
}
--
1.8.1.2