linux-kernel - Re: [PATCH v3 2/2] arm64: dts: meson: add support for the WeTek Core 2

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Date:   Tue, 21 Jul 2020 10:05:53 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Christian Hewitt <christianshewitt@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] arm64: dts: meson: add support for the WeTek Core
 2

On 19/07/2020 04:14, Christian Hewitt wrote:
> The WeTek Core2 is a commercial device based on the Amlogic Q200 reference
> design but with the following differences:
> 
> - 3GB RAM, 32GB eMMC
> - Blue and Red LEDs used to signal on/off status
> - uart_AO can be accessed after opening the case; soldering required
> - USB OTG is not accessible (inside the case)
> - Realtek RTL8152 Ethernet (internal USB connection)
> 
> Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
> ---
>  arch/arm64/boot/dts/amlogic/Makefile          |  1 +
>  .../dts/amlogic/meson-gxm-wetek-core2.dts     | 87 +++++++++++++++++++
>  2 files changed, 88 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-gxm-wetek-core2.dts
> 
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index 5cac4d1d487d..4e2239ffcaa5 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -41,6 +41,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxm-q201.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxm-rbox-pro.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxm-s912-libretech-pc.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxm-vega-s96.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-gxm-wetek-core2.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-sm1-sei610.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-sm1-khadas-vim3l.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-sm1-odroid-c4.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxm-wetek-core2.dts b/arch/arm64/boot/dts/amlogic/meson-gxm-wetek-core2.dts
> new file mode 100644
> index 000000000000..ec794c134c15
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxm-wetek-core2.dts
> @@ -0,0 +1,87 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2020 Christian Hewitt <christianshewitt@...il.com>
> + */
> +
> +/dts-v1/;
> +
> +#include "meson-gxm.dtsi"
> +#include "meson-gx-p23x-q20x.dtsi"
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/leds/common.h>
> +
> +/ {
> +	compatible = "wetek,core2", "amlogic,s912", "amlogic,meson-gxm";
> +	model = "WeTek Core 2";
> +
> +	memory@0 {
> +		device_type = "memory";
> +		reg = <0x0 0x0 0x0 0x80000000>; /* 2 GiB or 3 GiB */
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +
> +		blue {
> +			color = <LED_COLOR_ID_BLUE>;
> +			function = LED_FUNCTION_STATUS;
> +			gpios = <&gpio GPIODV_24 GPIO_ACTIVE_HIGH>;
> +			default-state = "on";
> +		};
> +	};
> +
> +	adc-keys {
> +		compatible = "adc-keys";
> +		io-channels = <&saradc 0>;
> +		io-channel-names = "buttons";
> +		keyup-threshold-microvolt = <1710000>;
> +
> +		button-update {
> +			label = "update";
> +			linux,code = <KEY_VENDOR>;
> +			press-threshold-microvolt = <10000>;
> +		};
> +	};
> +
> +	gpio-keys-polled {
> +		compatible = "gpio-keys-polled";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		poll-interval = <100>;
> +
> +		button-power {
> +			label = "power";
> +			linux,code = <KEY_POWER>;
> +			gpios = <&gpio_ao GPIOAO_2 GPIO_ACTIVE_LOW>;
> +		};
> +	};
> +};
> +
> +/* Disabled as Realtek RTL8152 USB provides Ethernet */
> +&ethmac {
> +	status = "disabled";
> +};
> +
> +&internal_phy {
> +	status = "disabled";
> +};
> +
> +&ir {
> +	linux,rc-map-name = "rc-wetek-play2";
> +};
> +
> +/* This is connected to the Bluetooth module: */
> +&uart_A {
> +	status = "okay";
> +	pinctrl-0 = <&uart_a_pins>, <&uart_a_cts_rts_pins>;
> +	pinctrl-names = "default";
> +	uart-has-rtscts;
> +
> +	bluetooth {
> +		compatible = "brcm,bcm43438-bt";
> +		shutdown-gpios = <&gpio GPIOX_17 GPIO_ACTIVE_HIGH>;
> +		max-speed = <2000000>;
> +		clocks = <&wifi32k>;
> +		clock-names = "lpo";
> +	};
> +};
> 

Reviewed-by: Neil Armstrong <narmstrong@...libre.com>