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Message-ID: <2108bd9f-629f-e871-3cfe-441c28719d52@linaro.org>
Date:   Mon, 21 Nov 2022 12:25:30 +0100
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Subject: Re: [PATCH 2/3] arm64: dts: qcom: msm8916-acer-a1-724: Add initial
 device tree
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To:     "Lin, Meng-Bo" <linmengbo0689@protonmail.com>,
        linux-kernel@vger.kernel.org
Cc:     Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Stephan Gerhold <stephan@gerhold.net>,
        Nikita Travkin <nikita@trvn.ru>, devicetree@vger.kernel.org,
        linux-arm-msm@vger.kernel.org,
        ~postmarketos/upstreaming@lists.sr.ht
References: <20221119194340.91789-1-linmengbo0689@protonmail.com>
 <20221119194718.92052-1-linmengbo0689@protonmail.com>
From:   Konrad Dybcio <konrad.dybcio@linaro.org>
In-Reply-To: <20221119194718.92052-1-linmengbo0689@protonmail.com>
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On 19.11.2022 20:48, Lin, Meng-Bo wrote:
> Acer Iconia Talk S A1-724 is a tablet using the MSM8916 SoC released
> in 2014.
> 
> Note: The original firmware from Acer can only boot 32-bit kernels.
> To boot arm64 kernels it is necessary to flash 64-bit TZ/HYP firmware
> with EDL, e.g. taken from the DragonBoard 410c. This works because Acer
> didn't set up (firmware) secure boot.
> 
> Add a device tree for with initial support for:
> 
> - GPIO keys
> - pm8916-vibrator
> - SDHCI (internal and external storage)
> - USB Device Mode
> - UART
> - WCNSS (WiFi/BT)
> - Regulators
> 
> Signed-off-by: Lin, Meng-Bo <linmengbo0689@protonmail.com>
> ---
>  arch/arm64/boot/dts/qcom/Makefile             |   1 +
>  .../boot/dts/qcom/msm8916-acer-a1-724.dts     | 217 ++++++++++++++++++
>  2 files changed, 218 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts
> 
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index afe496a93f94..f38a20074013 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -7,6 +7,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= ipq6018-cp01-c1.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk01.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk10-c1.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk10-c2.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-acer-a1-724.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-alcatel-idol347.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-asus-z00l.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-huawei-g7.dtb
> diff --git a/arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts b/arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts
> new file mode 100644
> index 000000000000..acd909551a75
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts
> @@ -0,0 +1,217 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +
> +/dts-v1/;
> +
> +#include "msm8916-pm8916.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +
> +/*
> + * NOTE: The original firmware from Acer can only boot 32-bit kernels.
> + * To boot this device tree using arm64 it is necessary to flash 64-bit
> + * TZ/HYP firmware (e.g. taken from the DragonBoard 410c).
> + * See https://wiki.postmarketos.org/wiki/Acer_Iconia_Talk_S_(acer-a1-724)
> + * for suggested installation instructions.
> + */
> +
> +/ {
> +	model = "Acer Iconia Talk S A1-724";
> +	compatible = "acer,a1-724", "qcom,msm8916";
> +	chassis-type = "tablet";
> +
> +	aliases {
> +		serial0 = &blsp1_uart2;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0";
> +	};
> +
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&gpio_keys_default>;
> +
> +		label = "GPIO Buttons";
> +
> +		button-volume-up {
> +			label = "Volume Up";
> +			gpios = <&msmgpio 107 GPIO_ACTIVE_LOW>;
> +			linux,code = <KEY_VOLUMEUP>;
> +		};
> +	};
> +
> +	usb_id: usb-id {
> +		compatible = "linux,extcon-usb-gpio";
> +		id-gpio = <&msmgpio 110 GPIO_ACTIVE_HIGH>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&usb_id_default>;
> +	};
> +};
> +
> +&blsp1_uart2 {
> +	status = "okay";
> +};
> +
> +&pm8916_resin {
> +	status = "okay";
> +	linux,code = <KEY_VOLUMEDOWN>;
> +};
> +
> +&pm8916_vib {
> +	status = "okay";
> +};
> +
> +&pronto {
> +	status = "okay";
> +};
> +
> +&sdhc_1 {
> +	status = "okay";
status last, please.

> +
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&sdc1_clk_on &sdc1_cmd_on &sdc1_data_on>;
> +	pinctrl-1 = <&sdc1_clk_off &sdc1_cmd_off &sdc1_data_off>;
> +};
> +
> +&sdhc_2 {
> +	status = "okay";
> +
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&sdc2_clk_on &sdc2_cmd_on &sdc2_data_on>;
> +	pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off>;
> +
> +	cd-gpios = <&msmgpio 38 GPIO_ACTIVE_HIGH>;
> +};
> +
> +&usb {
> +	status = "okay";
> +	extcon = <&usb_id>, <&usb_id>;
> +};
> +
> +&usb_hs_phy {
> +	extcon = <&usb_id>;
> +};
These usb references are not sorted alphabetically.

> +
> +&smd_rpm_regulators {
> +	vdd_l1_l2_l3-supply = <&pm8916_s3>;
> +	vdd_l4_l5_l6-supply = <&pm8916_s4>;
> +	vdd_l7-supply = <&pm8916_s4>;
> +
> +	s3 {
> +		regulator-min-microvolt = <1200000>;
> +		regulator-max-microvolt = <1300000>;
> +	};
> +
> +	s4 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <2100000>;
> +	};
> +
> +	l1 {
> +		regulator-min-microvolt = <1225000>;
> +		regulator-max-microvolt = <1225000>;
> +	};
> +
> +	l2 {
> +		regulator-min-microvolt = <1200000>;
> +		regulator-max-microvolt = <1200000>;
> +	};
> +
> +	l4 {
> +		regulator-min-microvolt = <2050000>;
> +		regulator-max-microvolt = <2050000>;
> +	};
> +
> +	l5 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +	};
> +
> +	l6 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +	};
> +
> +	l7 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +	};
> +
> +	l8 {
> +		regulator-min-microvolt = <2850000>;
> +		regulator-max-microvolt = <2900000>;
> +	};
> +
> +	l9 {
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +	};
> +
> +	l10 {
> +		regulator-min-microvolt = <2700000>;
> +		regulator-max-microvolt = <2800000>;
> +	};
> +
> +	l11 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <2950000>;
> +		regulator-allow-set-load;
> +		regulator-system-load = <200000>;
Please swap these last two properties.

Looks good otherwise.

Konrad
> +	};
> +
> +	l12 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <2950000>;
> +	};
> +
> +	l13 {
> +		regulator-min-microvolt = <3075000>;
> +		regulator-max-microvolt = <3075000>;
> +	};
> +
> +	l14 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +	};
> +
> +	l15 {
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +	};
> +
> +	l16 {
> +		regulator-min-microvolt = <2900000>;
> +		regulator-max-microvolt = <2900000>;
> +	};
> +
> +	l17 {
> +		regulator-min-microvolt = <2850000>;
> +		regulator-max-microvolt = <2850000>;
> +	};
> +
> +	l18 {
> +		regulator-min-microvolt = <2700000>;
> +		regulator-max-microvolt = <2700000>;
> +	};
> +};
> +
> +&msmgpio {
> +	gpio_keys_default: gpio-keys-default-state {
> +		pins = "gpio107";
> +		function = "gpio";
> +
> +		drive-strength = <2>;
> +		bias-pull-up;
> +	};
> +
> +	usb_id_default: usb-id-default-state {
> +		pins = "gpio110";
> +		function = "gpio";
> +
> +		drive-strength = <8>;
> +		bias-pull-up;
> +	};
> +};