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Wed, 30 Sep 2026 19:24:54 -0700 (PDT) From: Mikhail Kalashnikov To: Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Andre Przywara Subject: [PATCH v2 4/4] arm64: dts: allwinner: add Teclast P85T tablet Date: Thu, 1 Oct 2026 10:24:15 +0800 Message-ID: <20261001022415.913959-5-iuncuim@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20261001022415.913959-1-iuncuim@gmail.com> References: <20261001022415.913959-1-iuncuim@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The Teclast P85T is an 8-inch tablet that was announced in 2023 based on the Allwinner A523 (sun55i) SoC. Hardware summary: - Allwinner A523, 8x Cortex-A55 (2 clusters) - 4 GiB LPDDR3 DRAM - 64 GiB eMMC - microSD card slot - AXP717 and AXP323 PMICs - USB-C port wired to the USB2 OTG controller - combined WiFi and Bluetooth module based on AIC8800 (SDIO+UART) - 800x1280 MIPI-DSI panel (no mainline binding yet) - Silead GSL1680 touchscreen - MiraMEMS DA280 accelerometer - AXP717 battery/charger - USB-C OTG port (also for charging) - secure boot, but takes any key This initial submission enables only what mainline supports today: both PMICs, battery/charger, GPU (Panfrost), eMMC, SD card, SDIO WiFi (can be used with out of tree driver), USB device (without otg function), UART0 console, UART1 Bluetooth, I2C0 touchscreen, I2C1 accelerometer and the RTC with the external 32 kHz oscillator. Display (DE/TCON/DSI), PWM backlight, audio codec, camera (CSI/VIN) and LRADC keys are deliberately left out, as those blocks don't have a binding yet. The tablet uses secure boot, so it needs a signed TOC0 wrapped image to boot, but it has no key hash burnt into the efuses, so it accepts an image signed with any key. U-Boot support in progress. Later, a tablet with an Allwinner A537 processor and 3 GB of DRAM was released under the same name. This version is not supported by mainline. Assisted-by: OpenCode:DeepSeek-V4.1-Flash Signed-off-by: Mikhail Kalashnikov --- arch/arm64/boot/dts/allwinner/Makefile | 1 + .../allwinner/sun55i-a523-teclast-p85t.dts | 386 ++++++++++++++++++ 2 files changed, 387 insertions(+) create mode 100644 arch/arm64/boot/dts/allwinner/sun55i-a523-teclast-p85t.dts diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile index aa21f58a4..7025ba959 100644 --- a/arch/arm64/boot/dts/allwinner/Makefile +++ b/arch/arm64/boot/dts/allwinner/Makefile @@ -63,6 +63,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-2024.dtb dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-h.dtb dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-plus.dtb dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h700-anbernic-rg35xx-sp.dtb +dtb-$(CONFIG_ARCH_SUNXI) += sun55i-a523-teclast-p85t.dtb dtb-$(CONFIG_ARCH_SUNXI) += sun55i-a527-cubie-a5e.dtb dtb-$(CONFIG_ARCH_SUNXI) += sun55i-h728-x96qpro+.dtb dtb-$(CONFIG_ARCH_SUNXI) += sun55i-t527-avaota-a1.dtb diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523-teclast-p85t.dts b/arch/arm64/boot/dts/allwinner/sun55i-a523-teclast-p85t.dts new file mode 100644 index 000000000..d144f81d8 --- /dev/null +++ b/arch/arm64/boot/dts/allwinner/sun55i-a523-teclast-p85t.dts @@ -0,0 +1,386 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR MIT) +/* + * Copyright (C) 2026 Mikhail Kalashnikov + */ + +/dts-v1/; + +#include "sun55i-a523.dtsi" + +#include +#include + +/ { + model = "Teclast P85T"; + compatible = "teclast,p85t", "allwinner,sun55i-a523"; + chassis-type = "tablet"; + + aliases { + serial0 = &uart0; + }; + + battery: battery { + compatible = "simple-battery"; + constant-charge-current-max-microamp = <800000>; + voltage-max-design-microvolt = <4400000>; + charge-full-design-microamp-hours = <5000000>; + energy-full-design-microwatt-hours = <19250000>; + }; + + chosen { + stdout-path = "serial0:115200n8"; + }; + + ext_osc32k: ext-osc32k-clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <32768>; + clock-output-names = "ext_osc32k"; + }; + + reg_vcc5v: vcc5v { + /* board wide 5V supply from the USB-C connector */ + compatible = "regulator-fixed"; + regulator-name = "vcc-5v"; + regulator-min-microvolt = <5000000>; + regulator-max-microvolt = <5000000>; + regulator-always-on; + }; + + reg_vmmc1: vmmc1 { + compatible = "regulator-fixed"; + regulator-name = "vcc-wifi"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + vin-supply = <®_aldo3>; + gpio = <&r_pio 0 7 GPIO_ACTIVE_HIGH>; /* PL7 */ + enable-active-high; + }; + + wifi_pwrseq: pwrseq { + compatible = "mmc-pwrseq-simple"; + reset-gpios = <&r_pio 1 1 GPIO_ACTIVE_LOW>; /* PM1 */ + post-power-on-delay-ms = <200>; + }; +}; + +&gpu { + mali-supply = <®_dcdc2>; + status = "okay"; +}; + +&i2c0 { + pinctrl-names = "default"; + pinctrl-0 = <&i2c0_pins>; + clock-frequency = <400000>; + status = "okay"; + + touchscreen@40 { + compatible = "silead,gsl1680"; + reg = <0x40>; + interrupt-parent = <&pio>; + interrupts = <7 9 IRQ_TYPE_EDGE_FALLING>; /* PH9 */ + power-gpios = <&pio 7 10 GPIO_ACTIVE_HIGH>; /* PH10 */ + touchscreen-size-x = <1786>; + touchscreen-size-y = <1128>; + touchscreen-inverted-y; + touchscreen-swapped-x-y; + silead,max-fingers = <5>; + avdd-supply = <®_cldo2>; + }; +}; + +&i2c1 { + pinctrl-names = "default"; + pinctrl-0 = <&i2c1_pins>; + status = "okay"; + + accelerometer@26 { + compatible = "miramems,da280"; + reg = <0x26>; + interrupt-parent = <&pio>; + interrupts = <7 11 IRQ_TYPE_LEVEL_LOW>; /* PH11 */ + }; +}; + +&mmc0 { + vmmc-supply = <®_cldo3>; + cd-gpios = <&pio 5 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>; /* PF6 */ + bus-width = <4>; + status = "okay"; +}; + +&mmc1 { + vmmc-supply = <®_vmmc1>; + vqmmc-supply = <®_bldo1>; + mmc-pwrseq = <&wifi_pwrseq>; + bus-width = <4>; + non-removable; + status = "okay"; + + wifi@1 { + reg = <1>; + interrupt-parent = <&r_pio>; + interrupts = <1 0 IRQ_TYPE_LEVEL_LOW>; /* PM0 */ + interrupt-names = "host-wake"; + }; +}; + +&mmc2 { + vmmc-supply = <®_cldo3>; + vqmmc-supply = <®_cldo1>; + bus-width = <8>; + non-removable; + cap-mmc-hw-reset; + mmc-ddr-1_8v; + mmc-hs200-1_8v; + status = "okay"; +}; + +&pio { + vcc-pc-supply = <®_cldo1>; + vcc-pf-supply = <®_cldo3>; + vcc-pg-supply = <®_bldo1>; +}; + +&r_i2c0 { + status = "okay"; + + axp717: pmic@34 { + compatible = "x-powers,axp717"; + reg = <0x34>; + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&nmi_intc>; + interrupts = <0 IRQ_TYPE_LEVEL_LOW>; + + vin1-supply = <®_vcc5v>; + vin2-supply = <®_vcc5v>; + vin3-supply = <®_vcc5v>; + vin4-supply = <®_vcc5v>; + aldoin-supply = <®_vcc5v>; + bldoin-supply = <®_vcc5v>; + cldoin-supply = <®_vcc5v>; + + axp717_adc: adc { + compatible = "x-powers,axp717-adc"; + #io-channel-cells = <1>; + }; + + battery-power { + compatible = "x-powers,axp717-battery-power-supply"; + monitored-battery = <&battery>; + }; + + regulators { + /* Supplies the "little" cluster (1.0(?) GHz cores) */ + reg_dcdc1: dcdc1 { + regulator-always-on; + regulator-min-microvolt = <900000>; + regulator-max-microvolt = <1160000>; + regulator-name = "vdd-cpul"; + }; + + reg_dcdc2: dcdc2 { + regulator-always-on; + regulator-min-microvolt = <920000>; + regulator-max-microvolt = <920000>; + regulator-name = "vdd-gpu-sys"; + }; + + reg_dcdc3: dcdc3 { + regulator-always-on; + regulator-min-microvolt = <1260000>; + regulator-max-microvolt = <1260000>; + regulator-name = "vdd-dram"; + }; + + reg_aldo1: aldo1 { + /* camera sensor AVDD */ + regulator-min-microvolt = <2800000>; + regulator-max-microvolt = <2800000>; + regulator-name = "avdd-csi"; + }; + + reg_aldo2: aldo2 { + /* camera sensor IOVDD */ + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-name = "iovdd-csi"; + }; + + reg_aldo3: aldo3 { + /* + * supplies the I2C pins for this PMIC + * and the WiFi module + */ + regulator-always-on; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-name = "vcc-pl-pm"; + }; + + reg_aldo4: aldo4 { + regulator-always-on; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-name = "vcc-pll-dxco-avcc"; + }; + + reg_bldo1: bldo1 { + /* WiFi module 1.8V */ + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-name = "vcc-wifi-1v8"; + }; + + reg_bldo2: bldo2 { + regulator-always-on; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-name = "vcc-dram-1v8"; + }; + + reg_bldo3: bldo3 { + /* camera sensor DVDD/cameravdd */ + regulator-min-microvolt = <2800000>; + regulator-max-microvolt = <2800000>; + regulator-name = "vcc-csi"; + }; + + reg_bldo4: bldo4 { + /* camera sensor DVDD */ + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1200000>; + regulator-name = "dvdd-csi"; + }; + + reg_cldo1: cldo1 { + /* codec CPVIN, SD/eMMC 1.8V IO */ + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-name = "vcc-codec-mmc"; + }; + + reg_cldo2: cldo2 { + /* touch panel supply */ + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-name = "vcc-ctp"; + }; + + reg_cldo3: cldo3 { + /* SD/eMMC VMMC, codec VDD, UART0, g-sensor */ + regulator-always-on; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-name = "vcc-io-mmc"; + }; + + reg_cldo4: cldo4 { + /* LCD panel supply */ + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-name = "vcc-lcd"; + }; + + reg_cpusldo: cpusldo { + /* supplies the management core */ + regulator-always-on; + regulator-min-microvolt = <900000>; + regulator-max-microvolt = <900000>; + regulator-name = "vdd-cpus"; + }; + }; + + usb-power { + compatible = "x-powers,axp717-usb-power-supply"; + input-current-limit-microamp = <1750000>; + }; + }; + + axp323: pmic@36 { + compatible = "x-powers,axp323"; + reg = <0x36>; + #interrupt-cells = <1>; + interrupt-controller; + interrupt-parent = <&nmi_intc>; + interrupts = <0 IRQ_TYPE_LEVEL_LOW>; + + vin1-supply = <®_vcc5v>; + vin2-supply = <®_vcc5v>; + vin3-supply = <®_vcc5v>; + + regulators { + /* + * ALDO1 (1.8V) and DLDO1 (3.3V) have no consumers, + * although BSP enables them; the board works fine + * with both rails disabled. + */ + + /* Supplies the "big" cluster (1.8 GHz cores) */ + reg_dcdc1_323: dcdc1 { + regulator-always-on; + regulator-min-microvolt = <900000>; + regulator-max-microvolt = <1160000>; + regulator-name = "vdd-cpub"; + }; + + /* DCDC2 is polyphased with DCDC1 */ + + /* Some RISC-V management core related voltage */ + reg_dcdc3_323: dcdc3 { + regulator-always-on; + regulator-min-microvolt = <900000>; + regulator-max-microvolt = <900000>; + regulator-name = "vdd-dnr"; + }; + }; + }; +}; + +&r_pio { +/* + * Specifying the supply would create a circular dependency. + * + * vcc-pl-supply = <®_aldo3>; + */ + vcc-pm-supply = <®_aldo3>; +}; + +&rtc { + clocks = <&r_ccu CLK_BUS_R_RTC>, <&osc24M>, + <&r_ccu CLK_R_AHB>, <&ext_osc32k>; + clock-names = "bus", "hosc", "ahb", "ext-osc32k"; + assigned-clocks = <&rtc CLK_OSC32K>; + assigned-clock-rates = <32768>; +}; + +&uart0 { + pinctrl-names = "default"; + pinctrl-0 = <&uart0_pb_pins>; + status = "okay"; +}; + +&uart1 { + /* Bluetooth HCI, 4-wire with RTS/CTS */ + pinctrl-names = "default"; + pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>; + uart-has-rtscts; + status = "okay"; +}; + +&usb_otg { + /* + * The USB-C port is the primary power supply; VBUS control is not + * wired in mainline (AXP717 has no drivevbus), so the port can only + * act as a USB device powered from the host side. + */ + dr_mode = "peripheral"; + status = "okay"; +}; + +&usbphy { + usb0_vbus_det-gpios = <&pio 7 13 GPIO_ACTIVE_HIGH>; /* PH13 */ + status = "okay"; +}; -- 2.55.0