boards/google/icetower/google_icetower.dts

/*
 * Copyright (c) 2024 Google LLC
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;

#include <st/h7/stm32h743Xi.dtsi>
#include <st/h7/stm32h743vitx-pinctrl.dtsi>

/ {
	model = "Google Icetower development board";
	compatible = "google,icetower-fpmcu";

	chosen {
		zephyr,console = &usart1;
		zephyr,shell-uart = &usart1;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
	};
};

&clk_lsi {
	/* LSI clock frequency is 32kHz */
	status = "okay";
};

&clk_hsi {
	status = "okay";
	hsi-div = <1>;
	clock-frequency = <DT_FREQ_M(64)>;
};

&rcc {
	clocks = <&clk_hsi>;
	clock-frequency = <DT_FREQ_M(64)>;
	d1cpre = <1>;
	hpre = <1>;
	d1ppre = <1>;
	d2ppre1 = <1>;
	d2ppre2 = <1>;
	d3ppre = <1>;
};

/* USART1: Servo UART (console) */
&usart1 {
	pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
	pinctrl-names = "default";
	current-speed = <115200>;
	status = "okay";
};

/* SPI1: communication with the AP */
&spi1 {
	pinctrl-0 = <&spi1_nss_pa4 &spi1_sck_pa5
		     &spi1_miso_pa6 &spi1_mosi_pa7>;
	pinctrl-names = "default";
	status = "okay";
};

/* SPI4: communication with the fingerprint sensor */
&spi4 {
	pinctrl-0 = <&spi4_nss_pe11 &spi4_sck_pe12
		     &spi4_miso_pe13 &spi4_mosi_pe14>;
	pinctrl-names = "default";
	status = "okay";
};

&rtc {
	clocks = <&rcc STM32_CLOCK_BUS_APB4 0x00010000>,
		 <&rcc STM32_SRC_LSI RTC_SEL(2)>;
	status = "okay";

	backup_regs {
		status = "okay";
	};
};