Hi Tamás,
On 2024-11-11 19:17, Tamás Szűcs wrote:
> Add all supported UHS-I rates to sdmmc0 and allow 200 MHz maximum clock to
> benefit modern SD cards.
>
> Signed-off-by: Tamás Szűcs <tszucs@xxxxxxxxx>
> ---
> arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
> index 3d0c1ccfaa79..242af5337cdf 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
> @@ -670,8 +670,14 @@ &sdmmc0 {
> bus-width = <4>;
> cap-sd-highspeed;
> disable-wp;
> + max-frequency = <200000000>;
> pinctrl-names = "default";
> pinctrl-0 = <&sdmmc0_bus4 &sdmmc0_clk &sdmmc0_cmd &sdmmc0_det>;
> + sd-uhs-sdr12;
> + sd-uhs-sdr25;
> + sd-uhs-sdr50;
> + sd-uhs-sdr104;
> + sd-uhs-ddr50;
There is an issue with io-domain driver not always being probed before
mmc driver, this typically result in io-domain being configured wrong,
and mmc tuning happen before io-domain is correctly configured.
You can usually observe this by looking at the tuning value during boot
and comparing it to the tuning value after removing and re-insering a
sd-card.
Because of this uhs modes was left out from initial DT submission, some
cards will work others wont, sd-uhs-sdr50 is known to be working with
most cards even with the probe order issue.
Also I thought that lower speeds where implied?
Regards,
Jonas
> vmmc-supply = <&vcc3v3_sd>;
> vqmmc-supply = <&vccio_sd>;
> status = "okay";
