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mmc: SDHC 3.0: Base clock frequency change in spec 3.0

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SDHC Spec 3.0: Capabilities Register bits[15-08] are Base Clock Frequency
      1.0/2.0: Capabilities Register bits[13-08] are Base Clock Frequency

Signed-off-by: Zhangfei Gao <zgao6@marvell.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: Michal Miroslaw <mirqus@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Zhangfei Gao 2010-08-20 14:02:36 -04:00 committed by Chris Ball
parent 85105c53b0
commit c4687d5f60
2 changed files with 8 additions and 2 deletions
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9
drivers/mmc/host/sdhci.c
View file

@ -1794,8 +1794,13 @@ 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) {

1
drivers/mmc/host/sdhci.h
View file

@ -144,6 +144,7 @@
#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