Re: [PATCH] arm64: dts: qcom: Initial Xiaomi Mi 9 support (cepheus)

From: Konrad Dybcio
Date: Thu Jan 13 2022 - 06:05:25 EST



On 7.01.2022 03:59, Alexey Minnekhanov wrote:
> Add initial support for Xiaomi Mi 9 smartphone, based on
> Qualcomm SM8150 (Snapdragon 855) chipset.
>
> Currently the following features are supported:
> * reserved-memory map
> * debug UART
> * display using simple-framebuffer
> * physical keys: power, volume up/down, AI key
> * reboot modes
> * regulator voltages
> * USB peripheral mode
>
> Signed-off-by: Alexey Minnekhanov <alexeymin@xxxxxxxxxxxxxxxx>
> ---

[..]


> +++ b/arch/arm64/boot/dts/qcom/sm8150-xiaomi-cepheus.dts
Is there a shared xiaomi 8150/8150+/8150++(860) platform btw?

It seems like they release a new device each week, so there may be
some nice potential to commonize it in the future :D


> @@ -0,0 +1,575 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) 2021, Alexey Minnekhanov <alexeymin@xxxxxxxxxxxxxxxx>
22


> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
gpio.h can be moved to sm8150.dtsi


> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/input/gpio-keys.h>
> +#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> +#include "sm8150.dtsi"
> +#include "pm8150.dtsi"
> +#include "pm8150b.dtsi"
> +#include "pm8150l.dtsi"
> +
> +/*
> + * Rewrite reserved memory maps inherited from sm8150.dtsi to match the ones
> + * used on xiaomi-cepheus.
> + * Note: this list is ordered by its memory address in sm8150.dtsi.
> + */
> +/delete-node/ &tz_mem; /* same address but larger, no place for rmtfs_mem! */
> +/delete-node/ &rmtfs_mem; /* moved to completely different address */
> +/delete-node/ &adsp_mem; /* same start address, but larger size */
> +/delete-node/ &mpss_mem; /* same size, shifted higher, due to larger adsp_mem */
> +/delete-node/ &venus_mem; /* same size, shifted higher */
> +/delete-node/ &slpi_mem; /* same size, shifted higher */
> +/delete-node/ &ipa_fw_mem; /* same size, shifted higher */
> +/delete-node/ &ipa_gsi_mem; /* same size, shifted higher */
> +/delete-node/ &gpu_mem; /* same size, shifted higher */
> +/delete-node/ &spss_mem; /* same size, shifted higher */
> +/delete-node/ &cdsp_mem; /* same size, shifted higher */
> +
> +/ {
> + model = "Xiaomi Mi 9";
> + compatible = "xiaomi,cepheus", "qcom,sm8150";
> +
> + aliases {
> + serial0 = &uart2;
> + display0 = &framebuffer;
> + };
> +
> + chosen {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + stdout-path = "serial0:115200n8";
> +
> + framebuffer: framebuffer@9c000000 {
> + compatible = "simple-framebuffer";
> + reg = <0 0x9c000000 0 0x2300000>;
> + width = <1080>;
> + height = <2340>;
> + stride = <(1080 * 4)>;
> + format = "a8r8g8b8";
> + /*
> + * That's (going to be) a lot of clocks, but it's necessary due
> + * to unused clk cleanup & no panel driver yet (& no dispcc either)..
> + */
> + clocks = <&gcc GCC_DISP_HF_AXI_CLK>,
> + <&gcc GCC_DISP_SF_AXI_CLK>;
> + };
> + };
> +
> + gpio_keys {
> + compatible = "gpio-keys";
> + pinctrl-names = "default";
> + pinctrl-0 = <&ai_key_pin_a &vol_up_pin_a>;
> +
> + vol_up {
> + label = "volume_up";
> + gpios = <&pm8150_gpios 6 GPIO_ACTIVE_LOW>;
> + linux,input-type = <EV_KEY>;
> + linux,code = <KEY_VOLUMEUP>;
> + wakeup-source;
> + debounce-interval = <15>;
> + };
> +
> + ai_key {
> + label = "ai_key";
> + gpios = <&tlmm 97 GPIO_ACTIVE_LOW>;
> + linux,input-type = <EV_KEY>;
> + linux,code = <KEY_HOMEPAGE>; /* no AI key in Linux */
On Xperias with an additional button I set it to KEY_LEFTMETA for tiling WMs, maybe that could home in handy?
No pressure though

> + wakeup-source;
> + debounce-interval = <39>;
> + };
> + };
> +
> + reserved-memory {
> + tz_mem: memory@86200000 {
> + no-map;
> + reg = <0x0 0x86200000 0x0 0x5500000>;
> + phandle = <0x594>;
Phandle properties are generated by dtc at compile time, this is probably a leftover
from copying the decompiled dtb, also please move no-map below reg consistently in all nodes.


[..]

> +
> + vdd_boost_vreg: vdd-boost-regulator {
> + compatible = "regulator-fixed";
This regulator should have a voltage range specified.


> + regulator-name = "vdd_boost_vreg";
> + startup-delay-us = <4000>;
> + enable-active-high;
> + regulator-always-on;
> + gpio = <&pm8150b_gpios 5 GPIO_ACTIVE_HIGH>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&vdd_boost_en_pin>;
> + };
> +

[..]


> +&apps_rsc {
> + pm8150-rpmh-regulators {
> + compatible = "qcom,pm8150-rpmh-regulators";
> + qcom,pmic-id = "a";
> +
> + vdd-s1-supply = <&vph_pwr>;
> + vdd-s2-supply = <&vph_pwr>;
> + vdd-s3-supply = <&vph_pwr>;
> + vdd-s4-supply = <&vph_pwr>;
> + vdd-s5-supply = <&vph_pwr>;
> + vdd-s6-supply = <&vph_pwr>;
> + vdd-s7-supply = <&vph_pwr>;
> + vdd-s8-supply = <&vph_pwr>;
> + vdd-s9-supply = <&vph_pwr>;
> + vdd-s10-supply = <&vph_pwr>;
> +
> + vdd-l1-l8-l11-supply = <&vreg_s6a_0p9>;
> + vdd-l2-l10-supply = <&vreg_bob>;
> + vdd-l3-l4-l5-l18-supply = <&vreg_s6a_0p9>;
> + vdd-l6-l9-supply = <&vreg_s8c_1p3>;
> + vdd-l7-l12-l14-l15-supply = <&vreg_s5a_1p9>;
> + vdd-l13-l16-l17-supply = <&vreg_bob>;
> +
> + vreg_s2a_0p6: smps2 {
> + regulator-min-microvolt = <600000>;
> + regulator-max-microvolt = <600000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_s2a_0p6";
> + };
> +
> + vreg_s5a_1p9: smps5 {
> + regulator-min-microvolt = <1904000>;
> + regulator-max-microvolt = <2040000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_s5a_0p6";
> + };
> +
> + vreg_s6a_0p9: smps6 {
> + regulator-min-microvolt = <920000>;
> + regulator-max-microvolt = <1128000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_s6a_0p9";
> + };
> +
> + vreg_l1a_0p75: ldo1 {
> + regulator-min-microvolt = <752000>;
> + regulator-max-microvolt = <752000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_l1a_0p75";
> + };
> +
> + vreg_l2a_3p1: ldo2 {
> + regulator-min-microvolt = <3072000>;
> + regulator-max-microvolt = <3072000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_l2a_3p1";
> + };
> +
> + vreg_l3a_0p8: ldo3 {
> + regulator-min-microvolt = <480000>;
> + regulator-max-microvolt = <932000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_l3a_0p8";
0p8 seems weird considering the voltage range..

> + };
> +
> + vreg_l5a_0p875: ldo5 {
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <880000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_l5a_0p875";
definitely 0p88


> +
> + vreg_l18a_0p8: ldo18 {
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <912000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150_l18a_0p8";
and here 0p88 too


[..]


> +
> + vreg_s8c_1p3: smps8 {
> + regulator-min-microvolt = <1352000>;
> + regulator-max-microvolt = <1352000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_s8c_1p3";
1p35 unless it's voted otherwise


> + };
> +
> + vreg_l1c_1p8: ldo1 {
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l1c_1p8";
> + };
> +
> + vreg_l2c_1p3: ldo2 {
> + regulator-min-microvolt = <1304000>;
> + regulator-max-microvolt = <1304000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l2c_1p3";
> + };
> +
> + vreg_l3c_1p2: ldo3 {
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l3c_1p2";
> + };
> +
> + vreg_l4c_1p8: ldo4 {
> + regulator-min-microvolt = <1704000>;
> + regulator-max-microvolt = <2928000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l4c_1p8";
Again, 1p8 seems weird unless it's always voted to be 1p8


> + };
> +
> + vreg_l5c_1p8: ldo5 {
> + regulator-min-microvolt = <1704000>;
> + regulator-max-microvolt = <2928000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l5c_1p8";
> + };
ditto


> +
> + vreg_l6c_2p9: ldo6 {
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <2960000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-allow-set-load;
> + regulator-name = "pm8150l_l6c_2p9";
> + };
> +
> + vreg_l7c_3p0: ldo7 {
> + regulator-min-microvolt = <2856000>;
> + regulator-max-microvolt = <3104000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l7c_3p0";
> + };
> +
> + vreg_l8c_1p8: ldo8 {
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-name = "pm8150l_l8c_1p8";
> + };
> +
> + vreg_l9c_2p9: ldo9 {
> + regulator-min-microvolt = <2704000>;
> + regulator-max-microvolt = <2960000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-allow-set-load;
> + regulator-name = "pm8150l_l9c_2p9";
Again, weird unless it's voted otherwise



Btw, do we really want to name voltage lines on phones to sound like they are taken
out of a Dragonboard schematic without having the knowledge about the engineering behind it?

Well uh, unless somebody does actually have this knowledge of course..


> +&tlmm {
> + /* gpios 0..3 are NFC spi, gpios 126..129 are FP spi */
Since I'm asking you for changes already, I may as well ask you to capitalize SPI..
Also, is the entire NFC chip wired via SPI or only the Secure Element (SE)?


> + gpio-reserved-ranges = <0 4>, <126 4>;
> +
> + ai_key_pin_a: ai-key-pin-active {
> + pins = "gpio97";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-pull-up;
> + input-enable;
> + };
> +};
> +
> +&uart2 {
> + status = "okay";
> +};
> +
> +&usb_1 {
> + status = "okay";
> +};
> +
> +&usb_1_dwc3 {
> + snps,has-lpm-erratum;
> + snps,hird-threshold = /bits/ 8 <0x10>;
Looks like these two properties are set SoC-wide on 4.14


> + maximum-speed = "high-speed";
Shame, Xiaomi :(


> + dr_mode = "peripheral";
> +};
> +
> +&usb_1_hsphy {
> + status = "okay";
> + vdda-pll-supply = <&vreg_l5a_0p875>;
> + vdda18-supply = <&vreg_l12a_1p8>;
> + vdda33-supply = <&vreg_l2a_3p1>;
> +};
> +
> +&usb_1_qmpphy {
> + status = "okay";
> + vdda-phy-supply = <&vreg_l3c_1p2>;
> + vdda-pll-supply = <&vreg_l5a_0p875>;
> +};
>


Konrad