Re: [PATCH v8 06/11] arm64: dts: renesas: add support for solidrun rzg2lc som and hb-iiot evb

[Geert Uytterhoeven]

Hi Josua,

On Fri, 4 Sept 2026 at 13:56, Josua Mayer <josua@xxxxxxxxxxxxx> wrote:
> Add support for the SolidRun RZ/G2LC SoM [1] on HummingBoard IIoT [2].
>
> The SoM features:
> - 100Mbps Ethernet with PHY
> - eMMC
> - 1/2GB DDR
> - WiFi + Bluetooth
> - SDHI Mux switching between eMMC and Carrier Board
>
> The HummingBoard IIoT features:
> - 3x USB-2.0 Type A connector
> - 1x 100Mbps RJ45 Ethernet
> - USB Type-C Console Port
> - microSD connector
> - RTC with backup battery
> - RGB Status LED
> - 1x M.2 B-Key connector with USB-2.0 + SIM card holder
> - 1x DSI Display Connector
> - GPIO header
> - 2x RS232/RS485 ports (configurable)
>
> The RZ/G2LC SoM was designed to be pin compatible to G2L SoM, with
> slightly reduced feature set.
>
> Descriptions for eMMC, microSD, and RS485 are shared with G2L.
>
> [1] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/rz-g2lc-som/
> [2] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/hummingboard-rz-series-sbcs/hummingboard-rz-g2l-iot-sbc/
>
> Signed-off-by: Josua Mayer <josua@xxxxxxxxxxxxx>

Thanks for your patch!

> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r9a07g044c2-hummingboard-iiot.dts

> +&eth0 {
> +       phy-handle = <&phy0>;
> +       pinctrl-0 = <&eth0_pins>;
> +       pinctrl-names = "default";
> +       /*
> +        * ravb driver does not configure mac internal delays for RZ/G2L(C),
> +        * instead delays are added by the ADIN1200 phy driver.
> +        */
> +       phy-mode = "rgmii-id";
> +       status = "okay";
> +
> +       phy0: ethernet-phy@0 {
> +               reg = <0>;
> +               /* Level interrupts are typical for phy but not supported on rz/g2l gpios. */

Nit: "RZ/G2L" (in all patches)

> +               interrupts-extended = <&pinctrl RZG2L_GPIO(27, 0) IRQ_TYPE_EDGE_FALLING>;
> +       };
> +};

I didn't compare with the board schematics, but the rest LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds