tests/drivers/spi/spi_loopback/boards/esp32s3_devkitm_procpu.overlay

/*
 * Copyright (c) 2022 Kumar Gala <galak@kernel.org>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

&pinctrl {
	spim3_loopback: spim3_loopback {
		group1 {
			pinmux = <SPIM3_MISO_GPIO37>;
			output-enable; /* Enable internal loopback */
		};
		group2 {
			pinmux = <SPIM3_MOSI_GPIO37>;
			input-enable; /* Enable internal loopback */
		};
		group3 {
			pinmux = <SPIM3_SCLK_GPIO36>,
				<SPIM3_CSEL_GPIO38>;
		};
	};
};

&spi3 {
	slow@0 {
		compatible = "test-spi-loopback-slow";
		reg = <0>;
		spi-max-frequency = <100000>;
	};
	fast@0 {
		compatible = "test-spi-loopback-fast";
		reg = <0>;
		spi-max-frequency = <16000000>;
	};
};

&spi3 {
	dma-enabled;
	pinctrl-0 = <&spim3_loopback>;
};