On 07/15/2016 05:26 AM, Alim Akhtar wrote: > Hi Krzysztof, > > On 07/14/2016 06:17 PM, Krzysztof Kozlowski wrote: >> 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 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@xxxxxxxxxxx> >> --- >> arch/arm/boot/dts/exynos5410-odroidxu.dts | 2 -- >> 1 file changed, 2 deletions(-) >> >> diff --git a/arch/arm/boot/dts/exynos5410-odroidxu.dts >> b/arch/arm/boot/dts/exynos5410-odroidxu.dts >> index d9499310a301..7536164438ca 100644 >> --- a/arch/arm/boot/dts/exynos5410-odroidxu.dts >> +++ b/arch/arm/boot/dts/exynos5410-odroidxu.dts >> @@ -447,14 +447,12 @@ >> 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>; > not sure but can we use /delete-property/ option for this removable? No need for this. This property is set only here - in Odroid XU DTS. >> samsung,read-strobe-delay = <90>; > this also need to be removed. Ah, right, thanks! >> 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; > same as above if possible use /delete-property/ Same, no need because this does not come from other DTS/DTSI. >> vmmc-supply = <&ldo20_reg>; >> vqmmc-supply = <&ldo11_reg>; >> }; >> > Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
