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authorRabin Vincent <rabin.vincent@stericsson.com>2010-07-21 12:55:18 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-07-29 15:40:32 +0100
commit4380c14fd77338bac9d1da4dc5dd9f6eb4966c82 (patch)
tree1042ee4eec5b78c646fb75f6f8bb71328eb52673 /drivers
parent4956e10903fd3459306dd9438c1e714ba3068a2a (diff)
downloadkernel-4380c14fd77338bac9d1da4dc5dd9f6eb4966c82.tar.gz
ARM: 6245/1: mmci: enable hardware flow control on Ux500 variants
Although both the U300 and Ux500 use ST variants, the HWFCEN bits are at different positions, so use the variant_data to store the information. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/host/mmci.c8
-rw-r--r--drivers/mmc/host/mmci.h2
2 files changed, 6 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index fd2e7acbed39..379af904bf6c 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -39,19 +39,23 @@ static unsigned int fmax = 515633;
/**
* struct variant_data - MMCI variant-specific quirks
* @clkreg: default value for MCICLOCK register
+ * @clkreg_enable: enable value for MMCICLOCK register
*/
struct variant_data {
unsigned int clkreg;
+ unsigned int clkreg_enable;
};
static struct variant_data variant_arm = {
};
static struct variant_data variant_u300 = {
+ .clkreg_enable = 1 << 13, /* HWFCEN */
};
static struct variant_data variant_ux500 = {
.clkreg = MCI_CLK_ENABLE,
+ .clkreg_enable = 1 << 14, /* HWFCEN */
};
/*
* This must be called with host->lock held
@@ -71,8 +75,8 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
clk = 255;
host->cclk = host->mclk / (2 * (clk + 1));
}
- if (host->hw_designer == AMBA_VENDOR_ST)
- clk |= MCI_ST_FCEN; /* Bug fix in ST IP block */
+
+ clk |= variant->clkreg_enable;
clk |= MCI_CLK_ENABLE;
/* This hasn't proven to be worthwhile */
/* clk |= MCI_CLK_PWRSAVE; */
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index b98cc782402a..68970cfb81e1 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -28,8 +28,6 @@
#define MCI_4BIT_BUS (1 << 11)
/* 8bit wide buses supported in ST Micro versions */
#define MCI_ST_8BIT_BUS (1 << 12)
-/* HW flow control on the ST Micro version */
-#define MCI_ST_FCEN (1 << 13)
#define MMCIARGUMENT 0x008
#define MMCICOMMAND 0x00c