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SDMMC:

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Temporarily,the RK2926 machine reduces the sdcard frequency,due to be very prone to occur data-timeout-error.
And so the issue is resolved, and then change it back
This commit is contained in:
xbw 2012-10-17 11:51:04 +08:00
parent 90e4ae25c9
commit d4edd5332a
1 changed files with 6 additions and 0 deletions
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6
include/linux/mmc/mmc.h
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@ -344,7 +344,13 @@ struct _mmc_csd {
#define FOD_FREQ (300000) // in the identify stage, unit: hz, max is 400Khz,
// the least frequency is FREQ_HCLK_MAX/8
#define SD_FPP_FREQ (24000000) // normal sd freq, 25Mhz
#if defined(CONFIG_ARCH_RK2928)
//In rk2926 machine,very prone to occur data-timeout-error,the machine reduces the frequency.
#define SDHC_FPP_FREQ (39500000) // SDHC in the highspeed. unit is hz, max is 50Mhz.
#else
#define SDHC_FPP_FREQ (49500000) // SDHC in the highspeed. unit is hz, max is 50Mhz.
#endif
#define MMC_FPP_FREQ (19000000) // MMC freq, unit is hz, max is 20MHz
#define MMCHS_26_FPP_FREQ (24000000) // highspeed mode support 26M HS-MMC, unit is hz, max is 26Mhz,
#define MMCHS_52_FPP_FREQ (49500000) // highspeed support 52M HS-MMC, unit is hz, max is 52Mhz,