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mmc: zynq_sdhci: Added qurik to disable high speed

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Add quirk to disable high speed incase the high
speed was broken.This solves the issue where the
the controller is used in High Speed Mode and the
the hold time requirement for the JEDEC/MMC 4.41
specification is NOT met.
This timing issue is not on all boards and hence
provided config option to enable it when required.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Emil Lenchak <emill@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2016-01-12 15:12:16 +05:30 • committed by Michal Simek
parent 4297900260
commit b215614638
1 changed files with 5 additions and 0 deletions
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5
drivers/mmc/zynq_sdhci.c
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@ -24,6 +24,11 @@ static int arasan_sdhci_probe(struct udevice *dev)
host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
SDHCI_QUIRK_BROKEN_R1B;
#ifdef CONFIG_ZYNQ_HISPD_BROKEN
host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
#endif
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
add_sdhci(host, CONFIG_ZYNQ_SDHCI_MAX_FREQ,