[PATCH v5 2/2] ARM: dts: aspeed: Add device tree for Nvidia's GB200 UT3.0b platform BMC

[Donald Shannon]

Hi Krzysztof,

Thank you for the button catch.

Though, I don't see a redundant status = "okay"; in the FMC flash.
It is disabled by default in the aspeed-g6.dtsi:

         fmc: spi at 1e620000 {
             reg = <0x1e620000 0xc4>, <0x20000000 0x10000000>;
             #address-cells = <1>;
             #size-cells = <0>;
             compatible = "aspeed,ast2600-fmc";
             clocks = <&syscon ASPEED_CLK_AHB>;
             status = "disabled";
             interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
             flash at 0 {
                 reg = < 0 >;
                 compatible = "jedec,spi-nor";
                 spi-max-frequency = <50000000>;
                 spi-rx-bus-width = <2>;
                 status = "disabled";
             };

I will reupload v6 with the button and subject line correction and assume the status okay is okay.

Thanks,
Donald

On 7/21/25 00:44, Krzysztof Kozlowski wrote:
> External email: Use caution opening links or attachments
>
>
> On Fri, Jul 18, 2025 at 04:11:18PM -0700, Donald Shannon wrote:
>> +
>> +/ {
>> +     model = "AST2600 GB200 UT3.0b BMC";
>> +     compatible = "nvidia,gb200-ut30b", "aspeed,ast2600";
>> +
>> +     aliases {
>> +             serial2 = &uart3;
>> +             serial4 = &uart5;
>> +             i2c16   = &imux16;
>> +             i2c17   = &imux17;
>> +             i2c18   = &imux18;
>> +             i2c19   = &imux19;
>> +             i2c20   = &imux20;
>> +             i2c21   = &imux21;
>> +             i2c22   = &imux22;
>> +             i2c23   = &imux23;
>> +             i2c24   = &imux24;
>> +             i2c25   = &imux25;
>> +             i2c26   = &imux26;
>> +             i2c27   = &imux27;
>> +             i2c28   = &imux28;
>> +             i2c29   = &imux29;
>> +             i2c30   = &imux30;
>> +             i2c31   = &imux31;
>> +             i2c32   = &imux32;
>> +             i2c33   = &imux33;
>> +             i2c34   = &imux34;
>> +             i2c35   = &imux35;
>> +             i2c36   = &imux36;
>> +             i2c37   = &imux37;
>> +             i2c38   = &imux38;
>> +             i2c39   = &imux39;
>> +             i2c40   = &e1si2c0;
>> +             i2c41   = &e1si2c1;
>> +             i2c42   = &e1si2c2;
>> +             i2c43   = &e1si2c3;
>> +             i2c48   = &i2c17mux0;
>> +             i2c49   = &i2c17mux1;
>> +             i2c50   = &i2c17mux2;
>> +             i2c51   = &i2c17mux3;
>> +             i2c52   = &i2c25mux0;
>> +             i2c53   = &i2c25mux1;
>> +             i2c54   = &i2c25mux2;
>> +             i2c55   = &i2c25mux3;
>> +             i2c56   = &i2c29mux0;
>> +             i2c57   = &i2c29mux1;
>> +             i2c58   = &i2c29mux2;
>> +             i2c59   = &i2c29mux3;
>> +     };
>> +
>> +     buttons {
>> +             button-power {
>> +                     label = "power-btn";
> How is this supposed to work? How does anything bind here?
>
>> +                     gpio = <&sgpiom0 156 GPIO_ACTIVE_LOW>;
>> +             };
>> +             button-uid {
>> +                     label = "uid-btn";
>> +                     gpio = <&sgpiom0 154 GPIO_ACTIVE_LOW>;
>> +             };
>> +     };
>> +
>> +     chosen {
>> +             stdout-path = &uart5;
>> +     };
>> +
>> +     leds {
>> +             compatible = "gpio-leds";
>> +             led-0 {
>> +                     label = "uid_led";
>> +                     gpios = <&sgpiom0 27 GPIO_ACTIVE_LOW>;
>> +             };
>> +             led-1 {
>> +                     label = "fault_led";
>> +                     gpios = <&sgpiom0 29 GPIO_ACTIVE_LOW>;
>> +             };
>> +             led-2 {
>> +                     label = "power_led";
>> +                     gpios = <&sgpiom0 31 GPIO_ACTIVE_LOW>;
>> +             };
>> +     };
>> +
>> +     memory at 80000000 {
>> +             device_type = "memory";
>> +             reg = <0x80000000 0x80000000>;
>> +     };
>> +
>> +     reg_3v3_stby: regulator-3v3-standby {
>> +             compatible = "regulator-fixed";
>> +             regulator-name = "3v3-standby";
>> +             regulator-min-microvolt = <1800000>;
>> +             regulator-max-microvolt = <1800000>;
>> +             gpio = <&gpio0 ASPEED_GPIO(M, 3) GPIO_ACTIVE_HIGH>;
>> +             enable-active-high;
>> +             regulator-always-on;
>> +     };
>> +
>> +     reserved-memory {
>> +             #address-cells = <1>;
>> +             #size-cells = <1>;
>> +             ranges;
>> +
>> +             vga_memory: framebuffer at 9f000000 {
>> +                     no-map;
>> +                     reg = <0x9f000000 0x01000000>; /* 16M */
>> +             };
>> +
>> +             ramoops at a0000000 {
>> +                     compatible = "ramoops";
>> +                     reg = <0xa0000000 0x100000>; /* 1MB */
>> +                     record-size = <0x10000>; /* 64KB */
>> +                     max-reason = <2>; /* KMSG_DUMP_OOPS */
>> +             };
>> +
>> +             gfx_memory: framebuffer {
>> +                     compatible = "shared-dma-pool";
>> +                     reusable;
>> +                     size = <0x01000000>;
>> +                     alignment = <0x01000000>;
>> +             };
>> +
>> +             video_engine_memory: jpegbuffer {
>> +                     compatible = "shared-dma-pool";
>> +                     reusable;
>> +                     size = <0x02000000>;    /* 32M */
>> +                     alignment = <0x01000000>;
>> +             };
>> +     };
>> +};
>> +
>> +// Enable Primary flash on FMC for bring up activity
>> +&fmc {
>> +     status = "okay";
>> +     flash at 0 {
>> +             compatible = "jedec,spi-nor";
>> +             label = "bmc";
>> +             spi-max-frequency = <50000000>;
>> +             status = "okay";
> Why do you need it? Anything disabled it?
>
> Best regards,
> Krzysztof
>