AuxXxilium/linux_dsm_epyc7002
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ARM: dts: exynos: Properly select eMMC HighSpeed mode on Odroid XU

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Exynos5410 supports eMMC version 4.41 so HS200 is the top mode which
should be configured.  This is reflected in usage of
"samsung,exynos5250-dw-mshc" compatible.  However Odroid XU DTS
contained also property "mmc-hs400-1_8v" which is parsed by MMC core
therefore resulting in mixed configuration.  MMC core set HS400 but
dwmmc_exynos driver did not configure the data strobe for HS400 DDR
mode.

Removal of HS400 properties fixes semi-random mmc errors during boot:
  mmc_host mmc0: Bus speed (slot 0) = 400000000Hz (slot req 200000000Hz, actual 200000000HZ div = 1)
  mmc0: mmc_select_hs400 failed, error -84
  mmc0: error -84 whilst initialising MMC card

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
This commit is contained in:
Krzysztof Kozlowski 2016-07-15 10:12:49 +02:00
parent 29b4817d40
commit 162f2db394
1 changed files with 0 additions and 3 deletions
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arch/arm/boot/dts/exynos5410-odroidxu.dts
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@ -447,14 +447,11 @@ &mmc_0 {
samsung,dw-mshc-ciu-div = <3>;
samsung,dw-mshc-sdr-timing = <0 4>;
samsung,dw-mshc-ddr-timing = <0 2>;
samsung,dw-mshc-hs400-timing = <0 2>;
samsung,read-strobe-delay = <90>;
pinctrl-names = "default";
pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8 &sd0_cd>;
bus-width = <8>;
cap-mmc-highspeed;
mmc-hs200-1_8v;
mmc-hs400-1_8v;
vmmc-supply = <&ldo20_reg>;
vqmmc-supply = <&ldo11_reg>;
};