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mmc: sdhci-esdhc-imx: fix reading cap_1 register value for mx6sl

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When reading CAP_1 register for mx6sl, ignore bit[0-15] as it stores
CAP_2 register value which is new introduced in mx6sl.

Without this fix, the max clock for mx6sl may not be correct since
it's wrongly calculated by reading CAP_1 register.

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Dong Aisheng 2013-10-18 19:48:44 +08:00 committed by Chris Ball
parent 6e9fd28e1f
commit 6b4fb6712a
1 changed files with 4 additions and 0 deletions
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4
drivers/mmc/host/sdhci-esdhc-imx.c
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@ -226,6 +226,10 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
}
if (unlikely(reg == SDHCI_CAPABILITIES)) {
/* ignore bit[0-15] as it stores cap_1 register val for mx6sl */
if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
val &= 0xffff0000;
/* In FSL esdhc IC module, only bit20 is used to indicate the
* ADMA2 capability of esdhc, but this bit is messed up on
* some SOCs (e.g. on MX25, MX35 this bit is set, but they