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[1/1] sdhci-base-clock-freqency-change-in-spec-3.0

Message ID AANLkTims_z+X_bOK2v3AekBZWg1LsSecRCUeAi5HGseW@mail.gmail.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Zhangfei Gao Aug. 20, 2010, 6:22 a.m. UTC 
None
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Patch

From 6b82bd3c0fe55b7060b8d96801e5e2c4fecc79b7 Mon Sep 17 00:00:00 2001
From: Zhangfei Gao <zgao6@marvell.com>
Date: Fri, 20 Aug 2010 14:02:36 -0400
Subject: [PATCH] sdhci: base clock freqency change in spec 3.0

	sdhc spec 3.0:       Capabilities Register bits[15-08] is Base Clock Freqency
	sdhc spec 1.0 & 2.0: Capabilities Register bits[13-08] is Base Clock Freqency

Signed-off-by: Zhangfei Gao <zgao6@marvell.com>
---
 drivers/mmc/host/sdhci.c |    8 ++++++--
 drivers/mmc/host/sdhci.h |    1 +
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 7855121..458e5d4 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1778,8 +1778,12 @@  int sdhci_add_host(struct sdhci_host *host)
 		mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
 	}
 
-	host->max_clk =
-		(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
+	if (host->version >= SDHCI_SPEC_300)
+		host->max_clk =
+			(caps & SDHCI_CLOCK_V3_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
+	else
+		host->max_clk =
+			(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
 	host->max_clk *= 1000000;
 	if (host->max_clk == 0 || host->quirks &
 			SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) {
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 036cfae..8f71f56 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -140,6 +140,7 @@ 
 #define  SDHCI_TIMEOUT_CLK_SHIFT 0
 #define  SDHCI_TIMEOUT_CLK_UNIT	0x00000080
 #define  SDHCI_CLOCK_BASE_MASK	0x00003F00
+#define  SDHCI_CLOCK_V3_BASE_MASK	0x0000FF00
 #define  SDHCI_CLOCK_BASE_SHIFT	8
 #define  SDHCI_MAX_BLOCK_MASK	0x00030000
 #define  SDHCI_MAX_BLOCK_SHIFT  16
-- 
1.7.0.4