linux-kernel - [PATCH] mmc: Add a quirk for AMD SD controller doesn't support HS200

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Message-ID: <1415093259-5076-1-git-send-email-vincent.wan@amd.com>
Date:	Tue, 4 Nov 2014 17:27:39 +0800
From:	Vincent Wan <vincent.wan@....com>
To:	Ulf Hansson <ulf.hansson@...aro.org>
CC:	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Arindam Nath <arindam.nath@....com>,
	Huang Rui <ray.huang@....com>,
	Vincent Wan <vincent.wan@....com>
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 <vincent.wan@....com>
---
 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

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