linux-kernel - Re: [PATCH 4/5] ARM: dts: rockchip: Add Radxa Carrier board

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Date:   Wed, 20 Nov 2019 14:25:00 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Akash Gajjar <akash@...nedev.com>, Tom Cubie <tom@...xa.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-amarula@...rulasolutions.com
Subject: Re: [PATCH 4/5] ARM: dts: rockchip: Add Radxa Carrier board

Hi Jagan,

Am Mittwoch, 20. November 2019, 12:39:22 CET schrieb Jagan Teki:
> Carrier board often referred as baseboard. For making
> complete SBC, the associated SOM will mount on top of
> this carrier board.
> 
> Radxa has a carrier board which supports on board
> peripherals, ports like USB-2.0, USB-3.0, HDMI, MIPI DSI/CSI,
> eDP, Ethernet, PCIe, USB-C, 40-Pin GPIO header and etc.
> 
> Currently this carrier board can be used together with
> VMARC RK3399Por SOM for making Rock PI N10 SBC.
> 
> So add this carrier board dtsi as a separate file in
> ARM directory, so-that the same can reuse it in both
> arm32 and arm64 variants of Rockchip SOMs.

Do you really think someone will create an arm32 soc using that
carrier board?

Similarly so far I don't think we haven't even seen a lot of reuse
of existing carrier boards at all, other than their initial combination.

So maybe just having the content of your
	rockchip-radxa-carrierboard.dtsi
in
	rockchip/rk3399pro-rock-pi-n10.dts
from patch 5 might be a better start - at least until there is any
further usage - if at all?

Also rockchip-radxa-carrierboard might even be overly generic
as there may be multiple carrierboards from Radxa later on.

Heiko


> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> ---
>  .../boot/dts/rockchip-radxa-carrierboard.dtsi | 81 +++++++++++++++++++
>  1 file changed, 81 insertions(+)
>  create mode 100644 arch/arm/boot/dts/rockchip-radxa-carrierboard.dtsi
> 
> diff --git a/arch/arm/boot/dts/rockchip-radxa-carrierboard.dtsi b/arch/arm/boot/dts/rockchip-radxa-carrierboard.dtsi
> new file mode 100644
> index 000000000000..df3712aedf8a
> --- /dev/null
> +++ b/arch/arm/boot/dts/rockchip-radxa-carrierboard.dtsi
> @@ -0,0 +1,81 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 Fuzhou Rockchip Electronics Co., Ltd
> + * Copyright (c) 2019 Radxa Limited
> + * Copyright (c) 2019 Amarula Solutions(India)
> + */
> +
> +#include <dt-bindings/pwm/pwm.h>
> +
> +/ {
> +	chosen {
> +		stdout-path = "serial2:1500000n8";
> +	};
> +};
> +
> +&gmac {
> +	status = "okay";
> +};
> +
> +&i2c1 {
> +	status = "okay";
> +	i2c-scl-rising-time-ns = <140>;
> +	i2c-scl-falling-time-ns = <30>;
> +};
> +
> +&i2c2 {
> +	status = "okay";
> +	clock-frequency = <400000>;
> +
> +	hym8563: hym8563@51 {
> +		compatible = "haoyu,hym8563";
> +		reg = <0x51>;
> +		#clock-cells = <0>;
> +		clock-frequency = <32768>;
> +		clock-output-names = "hym8563";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&hym8563_int>;
> +		interrupt-parent = <&gpio4>;
> +		interrupts = <30 IRQ_TYPE_LEVEL_LOW>;
> +	};
> +};
> +
> +&pwm0 {
> +	status = "okay";
> +};
> +
> +&pwm2 {
> +	status = "okay";
> +};
> +
> +&sdmmc {
> +	bus-width = <4>;
> +	cap-mmc-highspeed;
> +	cap-sd-highspeed;
> +	cd-gpios = <&gpio0 RK_PA7 GPIO_ACTIVE_LOW>;
> +	disable-wp;
> +	vqmmc-supply = <&vccio_sd>;
> +	max-frequency = <150000000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_bus4>;
> +	status = "okay";
> +};
> +
> +&uart0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart0_xfer &uart0_cts>;
> +	status = "okay";
> +};
> +
> +&uart2 {
> +	status = "okay";
> +};
> +
> +&pinctrl {
> +	hym8563 {
> +		hym8563_int: hym8563-int {
> +			rockchip,pins =
> +				<4 RK_PD6 0 &pcfg_pull_up>;
> +		};
> +	};
> +};
>