[PATCH] arm64: dts: rockchip: Lower sd speed on soquartz

[Dan Johansen]

Den 05.03.2023 kl. 14.43 skrev Peter Geis:
> On Sat, Mar 4, 2023 at 11:42 AM Dan Johansen <strit at manjaro.org> wrote:
>> Just like the Quartz64 Model B the previously stated speed of sdr-104
>> in soquartz is too high for the hardware to reliably communicate with
>> some fast SD cards.
>> Especially on some carrierboards.
>>
>> Lower this to sd-uhs-sdr50 to fix this.
>>
>> Fixes: 5859b5a9c3ac ("arm64: dts: rockchip: add SoQuartz CM4IO dts")
>>
>> Signed-off-by: Dan Johansen <strit at manjaro.org>
> Makes sense, considering the problems we're having with other boards.
> We should probably stop using sdr104 altogether on Rockchip, at least
> until they release a chip that improves on the limitations of pinctrl
> speed. Considering the frequency cap it isn't that much of a hit.
I agree, better have a safe default.
>
> Acked-by: Peter Geis <pgwipeout at gmail.com>
Thank you for the Ack.
>
>> ---
>>   arch/arm64/boot/dts/rockchip/rk3566-soquartz.dtsi | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3566-soquartz.dtsi b/arch/arm64/boot/dts/rockchip/rk3566-soquartz.dtsi
>> index ce7165d7f1a1..102e448bc026 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3566-soquartz.dtsi
>> +++ b/arch/arm64/boot/dts/rockchip/rk3566-soquartz.dtsi
>> @@ -598,7 +598,7 @@ &sdmmc1 {
>>          non-removable;
>>          pinctrl-names = "default";
>>          pinctrl-0 = <&sdmmc1_bus4 &sdmmc1_cmd &sdmmc1_clk>;
>> -       sd-uhs-sdr104;
>> +       sd-uhs-sdr50;
>>          vmmc-supply = <&vcc3v3_sys>;
>>          vqmmc-supply = <&vcc_1v8>;
>>          status = "okay";
>> --
>> 2.39.2
>>
>>
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-- 
Kind regards
*Dan Johansen*
Project lead of the *Manjaro ARM* project
Manjaro-ARM <https://manjaro.org>