Re: [PATCH 02/12] arm64: dts: qcom: qcs6490-radxa-dragon-q6a: Enable UFS controller

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 4/7/26 5:19 PM, Xilin Wu wrote:
> Add and enable UFS related nodes for this board.
> 
> Note that UFS Gear-4 Rate-B is unstable due to board and UFS module design
> limitations. UFS on this board is stable when working at Gear-4 Rate-A.
> 
> Signed-off-by: Xilin Wu <sophon@radxa.com>
> ---
>  .../boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts     | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts b/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts
> index bb5a42b038f1..c961d3ec625f 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts
> @@ -959,6 +959,29 @@ &uart5 {
>  	status = "okay";
>  };
>  
> +&ufs_mem_hc {
> +	reset-gpios = <&tlmm 175 GPIO_ACTIVE_LOW>;
> +	vcc-supply = <&vreg_l7b_2p96>;
> +	vcc-max-microamp = <800000>;
> +	vccq-supply = <&vreg_l9b_1p2>;
> +	vccq-max-microamp = <900000>;
> +	vccq2-supply = <&vreg_l9b_1p2>;
> +	vccq2-max-microamp = <1300000>;
> +
> +	/* Gear-4 Rate-B is unstable due to board */
> +	/* and UFS module design limitations */

/* it's a bit weird to add two single-line */
/* comments near one another for a single paragraph */

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad