linux-kernel - [PATCH 4.1 082/159] mmc: sdhci-pci: set the clear transfer mode register quirk for O2Micro

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Date:	Sat, 26 Sep 2015 13:55:28 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Peter Guo <peter.guo@...hubtech.com>,
	Adam Lee <adam.lee@...onical.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 4.1 082/159] mmc: sdhci-pci: set the clear transfer mode register quirk for O2Micro

4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Adam Lee <adam.lee@...onical.com>

commit 143b648ddf1583905fa15d32be27a31442fc7933 upstream.

This patch fixes MMC not working issue on O2Micro/BayHub Host, which
requires transfer mode register to be cleared when sending no DMA
command.

Signed-off-by: Peter Guo <peter.guo@...hubtech.com>
Signed-off-by: Adam Lee <adam.lee@...onical.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mmc/host/sdhci-pci.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -549,6 +549,7 @@ static int jmicron_resume(struct sdhci_p
 static const struct sdhci_pci_fixes sdhci_o2 = {
 	.probe = sdhci_pci_o2_probe,
 	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+	.quirks2 = SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD,
 	.probe_slot = sdhci_pci_o2_probe_slot,
 	.resume = sdhci_pci_o2_resume,
 };


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