Oh okay, I was not aware of this issue
and have not encountered it yet.
But wouldn't it be more appropriate
to get u-boot to power cycle the host controller at boot?
From: Soeren Moch <smoch@xxxxxx>
Sent: Tuesday, April 27, 2021 5:07 PM
To: Christian Löhle <CLoehle@xxxxxxxxxxxxxx>; robh+dt@xxxxxxxxxx <robh+dt@xxxxxxxxxx>; heiko@xxxxxxxxx <heiko@xxxxxxxxx>; jbx6244@xxxxxxxxx <jbx6244@xxxxxxxxx>; devicetree@xxxxxxxxxxxxxxx <devicetree@xxxxxxxxxxxxxxx>; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>; linux-rockchip@xxxxxxxxxxxxxxxxxxx <linux-rockchip@xxxxxxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx <linux-kernel@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH] arm64: dts: rockchip: include uhs support for rockpro64
On 27.04.21 08:20, Christian L?hle wrote:
> The DesignWare Host Controller has full UHS-I support, so use it.
Enabling this UHS support makes 'reboot' hang when booting the RockPro64
from SD card. It would work when booting from eMMC, or with a modified
ATF which does a power cycle on reboot.
But for general use it is not save to enable UHS support, or did I miss
some recent changes?
Regards,
Soeren
>
> Signed-off-by: Christian Loehle <cloehle@xxxxxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> index 6bff8db7d33e..d22a489ec214 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> @@ -722,6 +722,7 @@ &sdmmc {
> max-frequency = <150000000>;
> pinctrl-names = "default";
> pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_bus4>;
> + sd-uhs-sdr104;
> vmmc-supply = <&vcc3v0_sd>;
> vqmmc-supply = <&vcc_sdio>;
> status = "okay";
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