board: Google Twinkie V2

This is a new board for the google Twinkie V2 tool.

Signed-off-by: Jason Yuan <jasonyuan@google.com>

boards/arm/google_twinkie_v2/Kconfig.board

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+# Copyright 2023 The ChromiumOS Authors
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_GOOGLE_TWINKIE_V2
+	bool "Google Twinkie V2 Board"
+	depends on SOC_STM32G0B1XX

boards/arm/google_twinkie_v2/Kconfig.defconfig

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+# Copyright 2023 The ChromiumOS Authors
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_GOOGLE_TWINKIE_V2
+
+config BOARD
+	default "google_twinkie_v2"
+
+endif # BOARD_GOOGLE_TWINKIE_V2

boards/arm/google_twinkie_v2/board.cmake

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+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(dfu-util "--pid=0483:df11" "--alt=0" "--dfuse")
+board_runner_args(stm32cubeprogrammer "--port=swd" "--reset=hw")
+board_runner_args(jlink "--device=STM32G0B1RE" "--speed=4000")
+
+include(${ZEPHYR_BASE}/boards/common/dfu-util.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/stm32cubeprogrammer.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/arm/google_twinkie_v2/doc/index.rst

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+.. _google_twinkie_v2_board:
+
+Google Twinkie V2
+#################
+
+Overview
+********
+
+Google Twinkie V2 is a reference board for the google power delivery analyzer
+(PDA) Twinkie V2.
+
+Hardware
+********
+
+- STM32G0B1REI6
+
+Supported Features
+==================
+
+The following features are supported:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| PINMUX    | on-chip    | pinmux                              |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| CLOCK     | on-chip    | reset and clock control             |
++-----------+------------+-------------------------------------+
+| FLASH     | on-chip    | flash memory                        |
++-----------+------------+-------------------------------------+
+
+The default configuration can be found in the defconfig file:
+``boards/arm/google_twinkie_v2/google_twinkie_v2_defconfig``
+
+Pin Mapping
+===========
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+- CC1_BUF : PA1
+- CC2_BUF : PA3
+- VBUS_READ_BUF : PB11
+- CSA_VBUS : PC4
+- CSA_CC2 : PC5
+
+Programming and Debugging
+*************************
+
+Build application as usual for the ``google_twinkie_v2`` board, and flash
+using dfu-util or J-Link.
+
+Debugging
+=========
+
+Use SWD with a J-Link or ST-Link.

boards/arm/google_twinkie_v2/google_twinkie_v2.dts

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+/*
+ * Copyright 2023 The ChromiumOS Authors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/g0/stm32g0b1Xe.dtsi>
+#include <st/g0/stm32g0b1r(b-c-e)ixn-pinctrl.dtsi>
+
+/ {
+	model = "Google Twinkie V2";
+	compatible = "google,twinkie-v2";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		red_led_0: led0 {
+			gpios = <&gpioc 8 GPIO_ACTIVE_LOW>;
+		};
+		green_led_1: led1 {
+			gpios = <&gpiob 6 GPIO_ACTIVE_LOW>;
+		};
+		blue_led_2: led2 {
+			gpios = <&gpiob 7 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		/* does not go to an actual button in current hardware.
+		 * short TP5 to TP6 to activate.
+		 */
+		dfu_detect: dfudetect {
+			gpios = <&gpioa 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+		};
+	};
+
+	cc1_buf: cc1buf {
+		compatible = "voltage-divider";
+		io-channels = <&adc1 1>;
+		output-ohms = <2000000000>;
+	};
+
+	cc2_buf: cc2buf {
+		compatible = "voltage-divider";
+		io-channels = <&adc1 3>;
+		output-ohms = <2000000000>;
+	};
+
+	vbus_read_buf: vbusv {
+		compatible = "voltage-divider";
+		io-channels = <&adc1 15>;
+		output-ohms = <68000>;
+		full-ohms = <(2000000 + 68000)>;
+	};
+
+	csa_vbus: vbusc {
+		compatible = "current-sense-amplifier";
+		io-channels = <&adc1 17>;
+		sense-resistor-micro-ohms = <3000>;
+		sense-gain-mult = <100>;
+	};
+
+	csa_cc2: vconc {
+		compatible = "current-sense-amplifier";
+		io-channels = <&adc1 18>;
+		sense-resistor-micro-ohms = <10000>;
+		sense-gain-mult = <25>;
+	};
+
+	aliases {
+		led0 = &red_led_0;
+		led1 = &green_led_1;
+		led2 = &blue_led_2;
+		bootloader-led0 = &blue_led_2;
+		vcc1 = &cc1_buf;
+		vcc2 = &cc2_buf;
+		vbus = &vbus_read_buf;
+		cbus = &csa_vbus;
+		ccon = &csa_cc2;
+	};
+};
+
+
+&adc1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	pinctrl-0 = <&adc1_in1_pa1	/* CC1_BUF	 */
+		     &adc1_in3_pa3	/* CC2_BUF	 */
+		     &adc1_in15_pb11	/* VBUS_READ_BUF */
+		     &adc1_in17_pc4	/* CSA_VBUS	 */
+		     &adc1_in18_pc5	/* CSA_CC2	 */
+		    >;
+	pinctrl-names = "default";
+	status = "okay";
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@3 {
+		reg = <3>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@15 {
+		reg = <15>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@17 {
+		reg = <17>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@18 {
+		reg = <18>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};
+
+&clk_hsi {
+	status = "okay";
+};
+
+&pll {
+	div-m = <1>;
+	mul-n = <8>;
+	div-p = <2>;
+	div-q = <2>;
+	div-r = <2>;
+	clocks = <&clk_hsi>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(64)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <1>;
+};
+
+&iwdg {
+	status = "okay";
+};
+
+&ucpd1 {
+	status = "okay";
+
+	psc-ucpdclk = <1>;
+	hbitclkdiv = <27>;
+	pinctrl-0 = <&ucpd1_cc1_pa8 &ucpd1_cc2_pb15>;
+	pinctrl-names = "default";
+};

boards/arm/google_twinkie_v2/google_twinkie_v2.yaml

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+identifier: google_twinkie_v2
+name: Google Twinkie V2
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+ram: 144
+flash: 512
+testing:
+  ignore_tags:
+    - net
+    - bluetooth

boards/arm/google_twinkie_v2/google_twinkie_v2_defconfig

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+# Copyright 2023 The ChromiumOS Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_SERIES_STM32G0X=y
+CONFIG_SOC_STM32G0B1XX=y
+
+# GPIO Controller
+CONFIG_GPIO=y
+
+# Enable Clocks
+CONFIG_CLOCK_CONTROL=y
+
+# enable pin controller
+CONFIG_PINCTRL=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y