On Fri 14 May 05:43 CDT 2021, Stephan Gerhold wrote: > The Huawei Ascend G7 is a smartphone from Huawei based on MSM8916. > It's fairly similar to the other MSM8916 devices, the only notable > exception are the "cd-gpios" for detecting if a SD card was inserted: > It looks like Huawei forgot to re-route this to gpio38, so the correct > GPIO seems to be gpio56 on this device. > > Note: The original firmware from Huawei 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 Huawei > forgot to set up (firmware) secure boot for some reason. > > Also note that Huawei no longer provides bootloader unlock codes. > This can be bypassed by patching the bootloader from a custom HYP firmware, > making it think the bootloader is unlocked. I use a modified version of > qhypstub [1], that patches a single instruction in the Huawei bootloader. > > The device tree contains initial support for the Huawei Ascend G7 with: > - UART (untested, probably available via some test points) > - eMMC/SD card > - Buttons > - Notification LED (combination of 3 GPIO LEDs) > - Vibrator > - WiFi/Bluetooth (WCNSS) > - USB > > [1]: https://github.com/msm8916-mainline/qhypstub > > Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx> > --- > arch/arm64/boot/dts/qcom/Makefile | 1 + > .../arm64/boot/dts/qcom/msm8916-huawei-g7.dts | 279 ++++++++++++++++++ > 2 files changed, 280 insertions(+) > create mode 100644 arch/arm64/boot/dts/qcom/msm8916-huawei-g7.dts > > diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile > index 456502aeee49..c894de19654e 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-$(CONFIG_ARCH_QCOM) += msm8916-alcatel-idol347.dtb > dtb-$(CONFIG_ARCH_QCOM) += msm8916-asus-z00l.dtb > +dtb-$(CONFIG_ARCH_QCOM) += msm8916-huawei-g7.dtb > dtb-$(CONFIG_ARCH_QCOM) += msm8916-longcheer-l8150.dtb > dtb-$(CONFIG_ARCH_QCOM) += msm8916-longcheer-l8910.dtb > dtb-$(CONFIG_ARCH_QCOM) += msm8916-mtp.dtb > diff --git a/arch/arm64/boot/dts/qcom/msm8916-huawei-g7.dts b/arch/arm64/boot/dts/qcom/msm8916-huawei-g7.dts > new file mode 100644 > index 000000000000..d67aa7dd4a21 > --- /dev/null > +++ b/arch/arm64/boot/dts/qcom/msm8916-huawei-g7.dts > @@ -0,0 +1,279 @@ > +// SPDX-License-Identifier: GPL-2.0-only Would it be possible to change this to BSD license instead? Apart from that, the patches looks really good. Thanks, Bjorn > +// Copyright (C) 2021 Stephan Gerhold > + > +/dts-v1/; > + > +#include "msm8916-pm8916.dtsi" > +#include <dt-bindings/gpio/gpio.h> > +#include <dt-bindings/input/input.h> > +#include <dt-bindings/leds/common.h> > + > +/* > + * Note: The original firmware from Huawei 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 Huawei > + * forgot to set up (firmware) secure boot for some reason. > + * > + * Also note that Huawei no longer provides bootloader unlock codes. > + * This can be bypassed by patching the bootloader from a custom HYP firmware, > + * making it think the bootloader is unlocked. > + * > + * See: https://wiki.postmarketos.org/wiki/Huawei_Ascend_G7_(huawei-g7) > + */ > + > +/ { > + model = "Huawei Ascend G7"; > + compatible = "huawei,g7", "qcom,msm8916"; > + > + aliases { > + serial0 = &blsp1_uart2; > + }; > + > + chosen { > + stdout-path = "serial0"; > + }; > + > + gpio-keys { > + compatible = "gpio-keys"; > + > + pinctrl-names = "default"; > + pinctrl-0 = <&gpio_keys_default>; > + > + label = "GPIO Buttons"; > + > + volume-up { > + label = "Volume Up"; > + gpios = <&msmgpio 107 GPIO_ACTIVE_LOW>; > + linux,code = <KEY_VOLUMEUP>; > + }; > + }; > + > + leds { > + compatible = "gpio-leds"; > + > + pinctrl-names = "default"; > + pinctrl-0 = <&gpio_leds_default>; > + > + led-0 { > + gpios = <&msmgpio 8 GPIO_ACTIVE_HIGH>; > + color = <LED_COLOR_ID_RED>; > + default-state = "off"; > + function = LED_FUNCTION_INDICATOR; > + }; > + > + led-1 { > + gpios = <&msmgpio 9 GPIO_ACTIVE_HIGH>; > + color = <LED_COLOR_ID_GREEN>; > + default-state = "off"; > + function = LED_FUNCTION_INDICATOR; > + }; > + > + led-2 { > + gpios = <&msmgpio 10 GPIO_ACTIVE_HIGH>; > + color = <LED_COLOR_ID_BLUE>; > + default-state = "off"; > + function = LED_FUNCTION_INDICATOR; > + }; > + }; > + > + usb_id: usb-id { > + compatible = "linux,extcon-usb-gpio"; > + id-gpio = <&msmgpio 117 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"; > + > + 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 &sdhc2_cd_default>; > + pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off &sdhc2_cd_default>; > + > + /* > + * The Huawei device tree sets cd-gpios = <&msmgpio 38 GPIO_ACTIVE_HIGH>. > + * However, gpio38 does not change its state when inserting/removing the > + * SD card, it's just low all the time. The Huawei kernel seems to use > + * polling for SD card detection instead. > + * > + * However, looking closer at the GPIO debug output it turns out that > + * gpio56 switches its state when inserting/removing the SD card. > + * It behaves just like gpio38 normally does. Usually GPIO56 is used as > + * "UIM2_PRESENT", i.e. to check if a second SIM card is inserted. > + * Maybe Huawei decided to replace the second SIM card slot with the > + * SD card slot and forgot to re-route to gpio38. > + */ > + cd-gpios = <&msmgpio 56 GPIO_ACTIVE_LOW>; > +}; > + > +&usb { > + status = "okay"; > + extcon = <&usb_id>, <&usb_id>; > +}; > + > +&usb_hs_phy { > + extcon = <&usb_id>; > +}; > + > +&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 = <2950000>; > + regulator-max-microvolt = <2950000>; > + }; > + > + 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>; > + }; > + > + 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 = <1800000>; > + regulator-max-microvolt = <3300000>; > + }; > + > + 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 { > + pins = "gpio107"; > + function = "gpio"; > + > + drive-strength = <2>; > + bias-pull-up; > + }; > + > + gpio_leds_default: gpio-leds-default { > + pins = "gpio8", "gpio9", "gpio10"; > + function = "gpio"; > + > + drive-strength = <2>; > + bias-disable; > + }; > + > + sdhc2_cd_default: sdhc2-cd-default { > + pins = "gpio56"; > + function = "gpio"; > + > + drive-strength = <2>; > + bias-disable; > + }; > + > + usb_id_default: usb-id-default { > + pins = "gpio117"; > + function = "gpio"; > + > + drive-strength = <8>; > + bias-pull-up; > + }; > +}; > -- > 2.31.1 >
