Re: [PATCH 2/2] arm64: dts: rockchip: Add Vicharak Vaaman board

[Krzysztof Kozlowski]

On Thu, Jul 16, 2026 at 02:58:59PM +0530, Hrushiraj Gandhi wrote:
> Add initial devicetree support for the Vicharak Vaaman, an RK3399-based
> single-board computer.
> 
> Supported peripherals:
> - RK808 PMIC with core/logic/IO regulators
> - SYR827/SYR828 (vdd_cpu_b/vdd_gpu) CPU-big and GPU regulators
> - Mali GPU
> - Gigabit Ethernet (RGMII, via &gmac)
> - eMMC (HS400, enhanced strobe)
> - microSD card slot
> - SARADC and TSADC
> - PWM-based vdd_log regulator
> - UART2 serial console
> 
> Tested by booting to a userspace shell over the serial console and
> verifying eMMC and microSD storage, and Ethernet link-up.
> 
> Signed-off-by: Hrushiraj Gandhi <hrushirajg23@xxxxxxxxx>
> ---
>  arch/arm64/boot/dts/rockchip/Makefile         |   1 +
>  .../dts/rockchip/rk3399-vicharak-vaaman.dts   | 438 ++++++++++++++++++
>  2 files changed, 439 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-vicharak-vaaman.dts
> 
> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
> index 761d82b4f4f2..e1b974502915 100644
> --- a/arch/arm64/boot/dts/rockchip/Makefile
> +++ b/arch/arm64/boot/dts/rockchip/Makefile
> @@ -90,6 +90,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rockpro64.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rockpro64-screen.dtbo
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire-excavator.dtb
> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-vicharak-vaaman.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399pro-rock-pi-n10.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-armsom-sige1.dtb
>  dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-nanopi-zero2.dtb
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-vicharak-vaaman.dts b/arch/arm64/boot/dts/rockchip/rk3399-vicharak-vaaman.dts
> new file mode 100644
> index 000000000000..6060365bf731
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-vicharak-vaaman.dts
> @@ -0,0 +1,438 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2026 Vicharak Computers Pvt Ltd
> + */
> +
> +/dts-v1/;
> +#include "rk3399.dtsi"
> +
> +/ {
> +	model = "Vicharak Vaaman";
> +	compatible = "vicharak,vaaman", "rockchip,rk3399";
> +
> +	aliases {
> +		ethernet0 = &gmac;
> +		mmc0 = &sdhci;
> +		mmc1 = &sdmmc;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial2:1500000n8";
> +	};
> +
> +	clkin_gmac: external-gmac-clock {
> +		compatible = "fixed-clock";
> +		clock-frequency = <125000000>;
> +		clock-output-names = "clkin_gmac";
> +		#clock-cells = <0>;
> +	};
> +
> +	vcc12v_dcin: vcc12v-dcin-regulator {

foo-regulator yes?

> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc12v_dcin";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +	};

This regulator is completely unused (other non-controllable do not
matter).

> +
> +	vcc3v3_lan: regulator-vcc3v3-lan {

so why here regulator-foo? Decide.

Please use name for all fixed regulators which matches current format
recommendation: 'regulator-[0-9]v[0-9]'
https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml


Best regards,
Krzysztof