>>
>> 1. support 8 bit data transfer width
> 8 bit buswidth patch is already merged to mm tree.
>
> http://marc.info/?l=linux-mmc&m=127783663526810&w=3
>
> Thank you,
> Kyungmin Park
>
Thanks Kyungmin, updated without 8 bit support.
>From 2b717444443acdac90c5f31522a1515a2000749a Mon Sep 17 00:00:00 2001
From: Zhangfei Gao <zg...@marvell.com>
Date: Fri, 6 Aug 2010 07:10:01 +0800
Subject: [PATCH] sdhc: support 10-bit divided clock Mode
Signed-off-by: Zhangfei Gao <zg...@marvell.com>
---
drivers/mmc/host/sdhci.c | 5 +++--
drivers/mmc/host/sdhci.h | 4 ++++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c6d1bd8..212dc9e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1002,7 +1002,8 @@ static void sdhci_set_clock(struct sdhci_host
*host, unsigned int clock)
}
div >>= 1;
- clk = div << SDHCI_DIVIDER_SHIFT;
+ clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
+ clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIVIDER_SHIFT) <<
SDHCI_DIVIDER_SHIFT_HI;
clk |= SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
@@ -1681,7 +1682,7 @@ int sdhci_add_host(struct sdhci_host *host)
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
host->version = (host->version & SDHCI_SPEC_VER_MASK)
>> SDHCI_SPEC_VER_SHIFT;
- if (host->version > SDHCI_SPEC_200) {
+ if (host->version > SDHCI_SPEC_300) {
printk(KERN_ERR "%s: Unknown controller version (%d). "
"You may experience problems.\n", mmc_hostname(mmc),
host->version);
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c846813..7c09b4f 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -85,6 +85,9 @@
#define SDHCI_CLOCK_CONTROL 0x2C
#define SDHCI_DIVIDER_SHIFT 8
+#define SDHCI_DIVIDER_SHIFT_HI 6
+#define SDHCI_DIV_MASK 0xFF
+#define SDHCI_DIV_HI_MASK 0x300
#define SDHCI_CLOCK_CARD_EN 0x0004
#define SDHCI_CLOCK_INT_STABLE 0x0002
#define SDHCI_CLOCK_INT_EN 0x0001
@@ -177,6 +180,7 @@
#define SDHCI_SPEC_VER_SHIFT 0
#define SDHCI_SPEC_100 0
#define SDHCI_SPEC_200 1
+#define SDHCI_SPEC_300 2
struct sdhci_ops;
--
1.6.0.4
--
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