Re: [PATCH v4 9/9] arm64: dts: amlogic: t7: khadas-vim4: Add MMC nodes

Ronald Claveau
2026-03-26T09:27:57Z

On 3/26/26 9:54 AM, Neil Armstrong wrote:
> On 3/25/26 10:15, Ronald Claveau wrote:
>> Enable and configure the three MMC controllers for the Khadas VIM4 board:
>> - sd_emmc_a: SDIO interface for the BCM43752 Wi-Fi module
>> - sd_emmc_b: SD card slot
>> - sd_emmc_c: eMMC storage
>>
>> Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
>> ---
>>   .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts  | 90 ++++++++++++
>> +++++++++-
>>   1 file changed, 89 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-
>> vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
>> index 770f06b0b16c7..5a73ae081036c 100644
>> --- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
>> +++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
>> @@ -14,7 +14,10 @@ / {
>>       compatible = "khadas,vim4", "amlogic,a311d2", "amlogic,t7";
>>         aliases {
>> -        serial0 = &uart_a;
>> +        serial0    = &uart_a;
>
> Spurious change
>

Thanks I will keep space instead of tab here.

>> +        mmc0    = &sd_emmc_c;
>> +        mmc1    = &sd_emmc_b;
>> +        mmc2    = &sd_emmc_a;
>>       };
>>         memory@0 {
>> @@ -159,6 +162,91 @@ &pwm_ab {
>>       pinctrl-names = "default";
>>   };
>>   +/* SDIO */
>> +&sd_emmc_a {
>> +    status = "okay";
>> +    pinctrl-0 = <&sdio_pins>;
>> +    pinctrl-1 = <&sdio_clk_gate_pins>;
>> +    pinctrl-names = "default", "clk-gate";
>> +    #address-cells = <1>;
>> +    #size-cells = <0>;
>> +
>> +    bus-width = <4>;
>> +    cap-sd-highspeed;
>> +    sd-uhs-sdr12;
>> +    sd-uhs-sdr25;
>> +    sd-uhs-sdr50;
>> +    sd-uhs-sdr104;
>> +    cap-sdio-irq;
>> +    max-frequency = <200000000>;
>> +    non-removable;
>> +    disable-wp;
>> +    no-mmc;
>> +    no-sd;
>> +
>> +    power-domains = <&pwrc PWRC_T7_SDIO_A_ID>;
>> +
>> +    keep-power-in-suspend;
>> +
>> +    mmc-pwrseq = <&sdio_pwrseq>;
>> +
>> +    vmmc-supply = <&vddao_3v3>;
>> +    vqmmc-supply = <&vddao_1v8>;
>> +
>> +    brcmf: wifi@1 {
>> +        reg = <1>;
>> +        compatible = "brcm,bcm43752-fmac", "brcm,bcm4329-fmac";
>> +    };
>> +};
>> +
>> +/* SD card */
>> +&sd_emmc_b {
>> +    status = "okay";
>> +    pinctrl-0 = <&sdcard_pins>;
>> +    pinctrl-1 = <&sdcard_clk_gate_pins>;
>> +    pinctrl-names = "default", "clk-gate";
>> +
>> +    bus-width = <4>;
>> +    cap-sd-highspeed;
>> +    sd-uhs-sdr12;
>> +    sd-uhs-sdr25;
>> +    sd-uhs-sdr50;
>> +    sd-uhs-sdr104;
>> +    max-frequency = <200000000>;
>> +    disable-wp;
>> +    no-sdio;
>> +    no-mmc;
>> +
>> +    power-domains = <&pwrc PWRC_T7_SDIO_B_ID>;
>> +
>> +    cd-gpios = <&gpio GPIOC_6 GPIO_ACTIVE_LOW>;
>> +    vmmc-supply = <&sd_3v3>;
>> +    vqmmc-supply = <&vddio_c>;
>> +};
>> +
>> +/* eMMC */
>> +&sd_emmc_c {
>> +    status = "okay";
>> +    pinctrl-0 = <&emmc_ctrl_pins>, <&emmc_data_8b_pins>,
>> <&emmc_ds_pins>;
>> +    pinctrl-1 = <&emmc_clk_gate_pins>;
>> +    pinctrl-names = "default", "clk-gate";
>> +
>> +    bus-width = <8>;
>> +    cap-mmc-highspeed;
>> +    mmc-ddr-1_8v;
>> +    mmc-hs200-1_8v;
>> +    max-frequency = <200000000>;
>> +    disable-wp;
>> +    non-removable;
>> +    no-sdio;
>> +    no-sd;
>> +
>> +    power-domains = <&pwrc PWRC_T7_EMMC_ID>;
>> +
>> +    vmmc-supply = <&vddio_3v3>;
>> +    vqmmc-supply = <&vddio_1v8>;
>> +};
>> +
>>   &uart_a {
>>       status = "okay";
>>       clocks = <&xtal>, <&xtal>, <&xtal>;
>>
>
> With that:
>
> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
>
> Thanks,
> Neil

--
Best regards,
Ronald