linux-kernel - [PATCH 3.12 026/122] mmc: sdhci-pci: Fix Braswell eMMC timeout clock frequency

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Message-Id: <e29366fda793d8d423e0a476b62c2a3a703d4dc6.1424099973.git.jslaby@suse.cz>
Date:	Tue, 17 Feb 2015 12:33:33 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Adrian Hunter <adrian.hunter@...el.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 026/122] mmc: sdhci-pci: Fix Braswell eMMC timeout clock frequency

From: Adrian Hunter <adrian.hunter@...el.com>

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

===============

commit a06586b62db5c63752e2e68daffec4baa275d594 upstream.

Braswell eMMC host controller specifies an incorrect
timeout clock frequncy in the capabilities registers.
The correct value is 1 MHz.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/mmc/host/sdhci-pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index a130a11d89de..730527af71d7 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -270,6 +270,8 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
 				 MMC_CAP_HW_RESET;
 	slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
 	slot->hw_reset = sdhci_pci_int_hw_reset;
+	if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC)
+		slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 	return 0;
 }
 
-- 
2.2.2

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