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Fri, 13 Nov 2026 11:08:07 -0800 (PST) Received: from [192.168.1.100] ([163.245.50.16]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c5095b23b09sm129444166b.26.2026.11.13.11.08.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 11:08:07 -0800 (PST) From: Alexander Letuchiy Date: Fri, 13 Nov 2026 22:05:05 +0300 Subject: [PATCH v2 9/9] arm64: dts: mediatek: Add Xiaomi Poco X4 GT X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261113-initial-mt6895-v2-9-4ab0aa9fa391@gmail.com> References: <20261113-initial-mt6895-v2-0-4ab0aa9fa391@gmail.com> In-Reply-To: <20261113-initial-mt6895-v2-0-4ab0aa9fa391@gmail.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Sean Wang , Greg Kroah-Hartman , Jiri Slaby , Wim Van Sebroeck , Guenter Roeck , Daniel Lezcano , Thomas Gleixner , Mattijs Korpershoek , Dmitry Torokhov , Kees Cook , Tony Luck , "Guilherme G. Piccoli" Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-serial@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-input@vger.kernel.org, phone-devel@vger.kernel.org, Alexander Letuchiy X-Mailer: b4 0.15.2 Add a device tree for the Xiaomi xaga board, which is sold as Xiaomi Poco X4 GT, Redmi Note 11T Pro/Pro+ and Redmi K50i. It enables a serial console on UART0 and the volume down key on the SoC keypad. The power and volume up keys are connected to the MT6363 PMIC, which isn't supported yet. The DT only describes the memory that Linux itself uses, which is the ramoops region. The bootloader updates the /memory node and adds the firmware carveouts to /reserved-memory, so their addresses are not hardcoded here. This DT must not be booted with a bootloader that does not do this, as Linux would then use memory owned by the firmware. The ramoops zone sizes place the console zone at the offset where the bootloader expects to find it. Signed-off-by: Alexander Letuchiy --- arch/arm64/boot/dts/mediatek/Makefile | 1 + .../arm64/boot/dts/mediatek/mt6895-xiaomi-xaga.dts | 87 ++++++++++++++++++++++ 2 files changed, 88 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile index a86fb313b1a9..d73489149ab5 100644 --- a/arch/arm64/boot/dts/mediatek/Makefile +++ b/arch/arm64/boot/dts/mediatek/Makefile @@ -6,6 +6,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-sony-xperia-m5.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-evb.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-x20-dev.dtb +dtb-$(CONFIG_ARCH_MEDIATEK) += mt6895-xiaomi-xaga.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-rfb1.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-bananapi-bpi-r64.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt7981b-cudy-wr3000-v1.dtb diff --git a/arch/arm64/boot/dts/mediatek/mt6895-xiaomi-xaga.dts b/arch/arm64/boot/dts/mediatek/mt6895-xiaomi-xaga.dts new file mode 100644 index 000000000000..8d529062eea1 --- /dev/null +++ b/arch/arm64/boot/dts/mediatek/mt6895-xiaomi-xaga.dts @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* + * Copyright (C) 2026 Alexander Letuchiy + */ + +/dts-v1/; +#include + +#include "mt6895.dtsi" + +/ { + model = "Xiaomi Poco X4 GT"; + compatible = "xiaomi,xaga", "mediatek,mt6895"; + chassis-type = "handset"; + + aliases { + serial0 = &uart0; + }; + + chosen { + stdout-path = "serial0:921600n8"; + }; + + memory@40000000 { + device_type = "memory"; + /* The size is updated by the bootloader. */ + reg = <0x0 0x40000000 0x2 0x0>; + }; + + reserved-memory { + ranges; + #address-cells = <2>; + #size-cells = <2>; + + /* The firmware carveouts are added by the bootloader. */ + + ramoops@48090000 { + compatible = "ramoops"; + reg = <0 0x48090000 0 0xe0000>; + no-map; + record-size = <0x10000>; + console-size = <0x40000>; + ftrace-size = <0x10000>; + pmsg-size = <0x10000>; + }; + }; +}; + +&keypad { + pinctrl-0 = <&keypad_pins>; + pinctrl-names = "default"; + debounce-delay-ms = <32>; + keypad,num-columns = <1>; + keypad,num-rows = <1>; + linux,keymap = ; + + status = "okay"; +}; + +&pio { + keypad_pins: keypad-pins { + pins-col { + pinmux = ; + bias-pull-up = ; + input-enable; + }; + }; + + uart0_pins: uart0-pins { + pins-rx { + pinmux = ; + bias-pull-up; + input-enable; + }; + + pins-tx { + pinmux = ; + }; + }; +}; + +&uart0 { + pinctrl-0 = <&uart0_pins>; + pinctrl-names = "default"; + + status = "okay"; +}; -- 2.56.0