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/rk3399_rockchip-uboot/drivers/mmc/
H A Dsdhci.cf88a429f1179c9d9ab2883fba0ed0aa13c9bd72e Thu Feb 19 18:22:53 UTC 2015 Matt Reimer <mreimer@sdgsystems.com> mmc: sdhci: fix bus width switching on Samsung SoCs

Fix bus width switching from 8-bit mode down to 4-bit or 1-bit modes on
Samsung SoCs using SDHCI_QUIRK_USE_WIDE8. These SoCs report controller
version 2.0 yet they support 8-bit bus widths. If 8-bit mode was
previously enabled and then an operation like "mmc dev" caused a switch
back down to 4-bit or 1-bit mode, WIDE8 was left set, causing failures.

This problem was manifested by "mmc dev" timing out.

Signed-off-by: Matt Reimer <mreimer@sdgsystems.com>