Linux preempt-rt

Check our new training course

Real-Time Linux with PREEMPT_RT

Check our new training course
with Creative Commons CC-BY-SA
lecture and lab materials

Bootlin logo

Elixir Cross Referencer

/*
 * Copyright (c) 2018 Bryan O'Donoghue
 * Copyright (c) 2019 Benjamin Valentin
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <init.h>
#include <drivers/pinmux.h>
#include <soc.h>

static int board_pinmux_init(const struct device *dev)
{
	const struct device *muxa = DEVICE_DT_GET(DT_NODELABEL(pinmux_a));
	const struct device *muxb = DEVICE_DT_GET(DT_NODELABEL(pinmux_b));
	const struct device *muxc = DEVICE_DT_GET(DT_NODELABEL(pinmux_c));

	ARG_UNUSED(dev);

	if (!device_is_ready(muxa)) {
		return -ENXIO;
	}
	if (!device_is_ready(muxb)) {
		return -ENXIO;
	}
	if (!device_is_ready(muxc)) {
		return -ENXIO;
	}

#if (ATMEL_SAM0_DT_SERCOM_CHECK(0, atmel_sam0_spi) && CONFIG_SPI_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(1, atmel_sam0_spi) && CONFIG_SPI_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(2, atmel_sam0_spi) && CONFIG_SPI_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(3, atmel_sam0_spi) && CONFIG_SPI_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(4, atmel_sam0_spi) && CONFIG_SPI_SAM0)
	/**
	 * SPI SERCOM4 on
	 *  MISO = PC19/pad 0,
	 *  CS   = PB31/pad 1,
	 *  MOSI = PB30/pad 2,
	 *  SCK  = PC18/pad 3
	 */
	pinmux_pin_set(muxc, 19, PINMUX_FUNC_F);
	pinmux_pin_set(muxb, 31, PINMUX_FUNC_F);
	pinmux_pin_set(muxb, 30, PINMUX_FUNC_F);
	pinmux_pin_set(muxc, 18, PINMUX_FUNC_F);
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(5, atmel_sam0_spi) && CONFIG_SPI_SAM0)
	pinmux_pin_set(muxb,  2, PINMUX_FUNC_D);
	pinmux_pin_set(muxb, 22, PINMUX_FUNC_D);
	pinmux_pin_set(muxb, 23, PINMUX_FUNC_D);
#endif

#if (ATMEL_SAM0_DT_SERCOM_CHECK(0, atmel_sam0_i2c) && CONFIG_I2C_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(1, atmel_sam0_i2c) && CONFIG_I2C_SAM0)
	/* SERCOM1 on SDA=PA16, SCL=PA17 */
	pinmux_pin_set(muxa, 16, PINMUX_FUNC_C);
	pinmux_pin_set(muxa, 17, PINMUX_FUNC_C);
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(2, atmel_sam0_i2c) && CONFIG_I2C_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(3, atmel_sam0_i2c) && CONFIG_I2C_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(4, atmel_sam0_i2c) && CONFIG_I2C_SAM0)
#warning Pin mapping may not be configured
#endif
#if (ATMEL_SAM0_DT_SERCOM_CHECK(5, atmel_sam0_i2c) && CONFIG_I2C_SAM0)
#warning Pin mapping may not be configured
#endif

#if (ATMEL_SAM0_DT_TCC_CHECK(0, atmel_sam0_tcc_pwm) && \
	defined(CONFIG_PWM_SAM0_TCC))

	/* TCC0 on WO3=PA19 */
	pinmux_pin_set(muxa, 19, PINMUX_FUNC_F);
#endif

#ifdef CONFIG_USB_DC_SAM0
	/* USB DP on PA25, USB DM on PA24 */
	pinmux_pin_set(muxa, 25, PINMUX_FUNC_G);
	pinmux_pin_set(muxa, 24, PINMUX_FUNC_G);
#endif
	return 0;
}

SYS_INIT(board_pinmux_init, PRE_KERNEL_2, CONFIG_PINMUX_INIT_PRIORITY);