Re: [PATCH] arm64: dts: qcom: add device tree for LG G7 and LG V35

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 02/06/2022 14:07, Stefan Hansson wrote:
> From: Anton Bambura <jenneron@protonmail.com>
> 
> Adds initial support for the LG G7 (judyln) and
> LG V35 (judyp) phones.

Thank you for your patch. There is something to discuss/improve.

> 
> Currently supported features:
> 
>  - Display via simplefb (panel driver is WIP)
>  - Keys
>  - Micro SD card
>  - Modem (not tested much, but initialises)
>  - UFS (crashes during intensive workloads, may need quirks)
>  - USB in peripheral mode
> 
> Signed-off-by: Anton Bambura <jenneron@protonmail.com>
> Signed-off-by: Stefan Hansson <newbie13xd@gmail.com>
> Tested-by: Gregari Ivanov <llamashere@posteo.de>
> ---
>  arch/arm64/boot/dts/qcom/Makefile             |   2 +
>  .../arm64/boot/dts/qcom/sdm845-lg-common.dtsi | 621 ++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts |  64 ++
>  arch/arm64/boot/dts/qcom/sdm845-lg-judyp.dts  |  40 ++
>  4 files changed, 727 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi
>  create mode 100644 arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
>  create mode 100644 arch/arm64/boot/dts/qcom/sdm845-lg-judyp.dts
> 
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index f9e6343acd03..2f31e62f550c 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -99,6 +99,8 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-cheza-r1.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-cheza-r2.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-cheza-r3.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-db845c.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-lg-judyln.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-lg-judyp.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-mtp.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-oneplus-enchilada.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-oneplus-fajita.dtb
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi
> new file mode 100644
> index 000000000000..2a961454d248
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi
> @@ -0,0 +1,621 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * SDM845 LG G7 / V35 (judyln / judyp) common device tree
> + *
> + * Copyright (c) 2022, The Linux Foundation. All rights reserved.
> + */
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> +
> +#include "sdm845.dtsi"
> +#include "pm8998.dtsi"
> +#include "pmi8998.dtsi"
> +
> +/delete-node/ &adsp_mem;
> +/delete-node/ &cdsp_mem;
> +/delete-node/ &gpu_mem;
> +/delete-node/ &ipa_fw_mem;
> +/delete-node/ &mba_region;
> +/delete-node/ &mpss_region;
> +/delete-node/ &qseecom_mem;
> +/delete-node/ &rmtfs_mem;
> +/delete-node/ &slpi_mem;
> +/delete-node/ &spss_mem;
> +/delete-node/ &venus_mem;
> +/delete-node/ &wlan_msa_mem;
> +
> +/ {
> +	chosen {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		framebuffer@9d400000 {
> +			compatible = "simple-framebuffer";
> +			width = <1440>;
> +			stride = <(1440 * 4)>;
> +			format = "a8r8g8b8";
> +		};
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		qseecom_mem: memory@b2000000 {
> +			reg = <0 0xb2000000 0 0x1800000>;
> +			no-map;
> +		};
> +
> +		gpu_mem: memory@8c415000 {
> +			reg = <0 0x8c415000 0 0x2000>;
> +			no-map;
> +		};
> +
> +		ipa_fw_mem: memory@8c400000 {
> +			reg = <0 0x8c400000 0 0x10000>;
> +			no-map;
> +		};
> +
> +		adsp_mem: memory@8c500000 {
> +			reg = <0 0x8c500000 0 0x1e00000>;
> +			no-map;
> +		};
> +
> +		wlan_msa_mem: memory@8e300000 {
> +			reg = <0 0x8e300000 0 0x100000>;
> +			no-map;
> +		};
> +
> +		mpss_region: memory@8e400000 {
> +			reg = <0 0x8e400000 0 0x8900000>;
> +			no-map;
> +		};
> +
> +		venus_mem: memory@96d00000 {
> +			reg = <0 0x96d00000 0 0x500000>;
> +			no-map;
> +		};
> +
> +		cdsp_mem: memory@97200000 {
> +			reg = <0 0x97200000 0 0x800000>;
> +			no-map;
> +		};
> +
> +		mba_region: memory@97a00000 {
> +			reg = <0 0x97a00000 0 0x200000>;
> +			no-map;
> +		};
> +
> +		slpi_mem: memory@97c00000 {
> +			reg = <0 0x97c00000 0 0x1400000>;
> +			no-map;
> +		};
> +
> +		spss_mem: memory@99000000 {
> +			reg = <0 0x99000000 0 0x100000>;
> +			no-map;
> +		};
> +
> +		/* Framebuffer region */
> +		memory@9d400000 {
> +			reg = <0x0 0x9d400000 0x0 0x2400000>;
> +			no-map;
> +		};
> +
> +		/* rmtfs lower guard */
> +		memory@f0800000 {
> +			reg = <0 0xf0800000 0 0x1000>;
> +			no-map;
> +		};
> +
> +		rmtfs_mem: memory@f0801000 {
> +			compatible = "qcom,rmtfs-mem";
> +			reg = <0 0xf0801000 0 0x200000>;
> +			no-map;
> +
> +			qcom,client-id = <1>;
> +			qcom,vmid = <15>;
> +		};
> +
> +		/* rmtfs upper guard */
> +		memory@f0a01000 {
> +			reg = <0 0xf0a01000 0 0x1000>;
> +			no-map;
> +		};
> +	};
> +
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&vol_up_pin_a>;
> +
> +		label = "GPIO Buttons";

Is "label" really a property of gpio-keys node?

> +
> +		vol-up {

Generic node names, please, so "key-0" or "key-vol-up".

> +			label = "Volume up";
> +			linux,code = <KEY_VOLUMEUP>;
> +			gpios = <&pm8998_gpio 6 GPIO_ACTIVE_LOW>;
> +		};
> +	};
> +
> +	vph_pwr: vph-pwr-regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vph_pwr";
> +		regulator-min-microvolt = <3700000>;
> +		regulator-max-microvolt = <3700000>;
> +	};
> +
> +	/*
> +	 * Apparently RPMh does not provide support for PM8998 S4 because it
> +	 * is always-on; model it as a fixed regulator.
> +	 */
> +	vreg_s4a_1p8: pm8998-smps4 {

Generic node names, so also please suffix it with regulator, e.g.
pm8998-smps4-regulator

> +		compatible = "regulator-fixed";
> +		regulator-name = "vreg_s4a_1p8";
> +
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		regulator-always-on;
> +		regulator-boot-on;
> +
> +		vin-supply = <&vph_pwr>;
> +	};
> +};
> +
> +&adsp_pas {
> +	status = "okay";
> +};
> +

(...)

> +
> +&gpu {
> +	status = "disabled";

Why is it being disabled?

> +
> +	zap-shader {
> +		memory-region = <&gpu_mem>;
> +	};
> +};
> +
> +&ipa {
> +	status = "okay";
> +	modem-init;
> +};
> +
> +&mss_pil {
> +	status = "okay";
> +};
> +
> +&pm8998_pon {
> +	resin {
> +		compatible = "qcom,pm8941-resin";
> +		interrupts = <0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
> +		debounce = <15625>;
> +		bias-pull-up;
> +		linux,code = <KEY_VOLUMEDOWN>;
> +	};
> +};
> +
> +&sdhc_2 {
> +	status = "okay";
> +
> +	cd-gpios = <&tlmm 126 GPIO_ACTIVE_LOW>;
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sdc2_clk &sdc2_cmd &sdc2_data &sd_card_det_n>;
> +
> +	vmmc-supply = <&vreg_l21a_2p95>;
> +	vqmmc-supply = <&vddpx_2>;
> +};
> +
> +/*
> + * UFS works partially and only with clk_ignore_unused.
> + * Sometimes it crashes with I/O errors.
> + */
> +&ufs_mem_hc {
> +	status = "okay";
> +
> +	reset-gpios = <&tlmm 150 GPIO_ACTIVE_LOW>;
> +
> +	vcc-supply = <&vreg_l20a_2p95>;
> +	vcc-max-microamp = <600000>;
> +};
> +
> +&ufs_mem_phy {
> +	status = "okay";
> +
> +	vdda-phy-supply = <&vdda_ufs1_core>;
> +	vdda-pll-supply = <&vdda_ufs1_1p2>;
> +};
> +
> +&usb_1 {
> +	status = "okay";
> +};
> +
> +&usb_1_dwc3 {
> +	/* TODO: these devices have usb id pin */
> +	dr_mode = "peripheral";
> +};
> +
> +&usb_1_hsphy {
> +	status = "okay";
> +
> +	vdd-supply = <&vdda_usb1_ss_core>;
> +	vdda-pll-supply = <&vdda_qusb_hs0_1p8>;
> +	vdda-phy-dpdm-supply = <&vdda_qusb_hs0_3p1>;
> +
> +	qcom,imp-res-offset-value = <8>;
> +	qcom,hstx-trim-value = <QUSB2_V2_HSTX_TRIM_21_6_MA>;
> +	qcom,preemphasis-level = <QUSB2_V2_PREEMPHASIS_5_PERCENT>;
> +	qcom,preemphasis-width = <QUSB2_V2_PREEMPHASIS_WIDTH_HALF_BIT>;
> +};
> +
> +&usb_1_qmpphy {
> +	status = "okay";
> +
> +	vdda-phy-supply = <&vdda_usb1_ss_1p2>;
> +	vdda-pll-supply = <&vdda_usb1_ss_core>;
> +};
> +
> +/* PINCTRL - additions to nodes defined in sdm845.dtsi */
> +
> +&tlmm {
> +	gpio-reserved-ranges = <28 4>, <81 4>;
> +
> +	sdc2_clk: sdc2-clk {
> +		pinconf {
> +			pins = "sdc2_clk";
> +			bias-disable;
> +
> +			/*
> +			 * It seems that mmc_test reports errors if drive
> +			 * strength is not 16 on clk, cmd, and data pins.
> +			 *
> +			 * TODO: copy-pasted from mtp, try other values
> +			 * on these devices.
> +			 */
> +			drive-strength = <16>;
> +		};
> +	};
> +
> +	sdc2_cmd: sdc2-cmd {
> +		pinconf {
> +			pins = "sdc2_cmd";
> +			bias-pull-up;
> +			drive-strength = <16>;
> +		};
> +	};
> +
> +	sdc2_data: sdc2-data {
> +		pinconf {
> +			pins = "sdc2_data";
> +			bias-pull-up;
> +			drive-strength = <16>;
> +		};
> +	};
> +
> +	sd_card_det_n: sd-card-det-n {
> +		pinmux {
> +			pins = "gpio126";
> +			function = "gpio";
> +		};
> +
> +		pinconf {
> +			pins = "gpio126";
> +			bias-pull-up;
> +		};
> +	};
> +};
> +
> +&pm8998_gpio {
> +	vol_up_pin_a: vol-up-active {

You need -pins suffix

https://lore.kernel.org/all/20220507194913.261121-3-krzysztof.kozlowski@linaro.org/

> +		pins = "gpio6";
> +		function = "normal";
> +		input-enable;
> +		bias-pull-up;
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_NO>;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
> new file mode 100644
> index 000000000000..a1a0110e7af7
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
> @@ -0,0 +1,64 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * SDM845 LG G7 (judyln) device tree.
> + *
> + * Copyright (c) 2022, The Linux Foundation. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "sdm845-lg-common.dtsi"
> +
> +/ {
> +	model = "LG G7 ThinQ";
> +	compatible = "lg,judyln", "qcom,sdm845";

You need to document the compatibles in arm/qcom.yaml

> +
> +	chosen {
> +		framebuffer@9d400000 {
> +			reg = <0x0 0x9d400000 0x0 (1440 * 3120 * 4)>;
> +			height = <3120>;
> +			lab-supply = <&lab>;
> +			ibb-supply = <&ibb>;

You already have it in your DTSI, so either override by label or move
everything to each DTS. I think the second seems more readable, because
it is weird to see device node with unit address but without reg (as it
is in DTSI).

> +		};
> +	};
> +
> +	/* Additional ThinQ key */
> +	gpio-keys {
> +		pinctrl-0 = <&vol_up_pin_a &thinq_key_default>;
> +
> +		thinq {

Generic node names, so "key-0" or "key-thinq".

Same comments for second DTS.

> +			label = "ThinQ";
> +			linux,code = <KEY_ASSISTANT>;
> +			interrupt-parent = <&tlmm>;
> +			interrupts = <89 IRQ_TYPE_LEVEL_LOW>;
> +		};
> +	};

Best regards,
Krzysztof