From: zhangfei gao <zhangfei.gao@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>, linux-mmc@vger.kernel.org
Cc: Anton Vorontsov <cbouatmailru@gmail.com>,
Ben Dooks <ben-linux@fluff.org>,
Wolfram Sang <w.sang@pengutronix.de>,
Matt Fleming <matt@console-pimps.org>,
Haojian Zhuang <haojian.zhuang@gmail.com>,
Eric Miao <eric.y.miao@gmail.com>
Subject: [patch 1/1] sdhci-base-clock-freqency-change-in-spec-3.0
Date: Fri, 20 Aug 2010 02:22:56 -0400 [thread overview]
Message-ID: <AANLkTims_z+X_bOK2v3AekBZWg1LsSecRCUeAi5HGseW@mail.gmail.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 1705 bytes --]
>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
[-- Attachment #2: 0001-sdhci-base-clock-freqency-change-in-spec-3.0.patch --]
[-- Type: text/x-patch, Size: 1706 bytes --]
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
next reply other threads:[~2010-08-20 6:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-20 6:22 zhangfei gao [this message]
2010-08-20 6:37 ` [patch 1/1] sdhci-base-clock-freqency-change-in-spec-3.0 zhangfei gao
2010-09-14 13:18 ` Chris Ball
2010-09-14 13:45 ` Wolfram Sang
[not found] ` <AANLkTi=7gXkF+JpOfM+KaWxHPDzT=0SL5oSXDw0hTmJm@mail.gmail.com>
2010-09-15 10:10 ` Wolfram Sang
2010-09-19 1:56 ` zhangfei gao
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