drivers/memc/memc_stm32.c

/*
 * Copyright (c) 2020 Teslabs Engineering S.L.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#define DT_DRV_COMPAT st_stm32_fmc

#include <device.h>

#include <drivers/clock_control/stm32_clock_control.h>
#include <drivers/pinctrl.h>

#include <logging/log.h>
LOG_MODULE_REGISTER(memc_stm32, CONFIG_MEMC_LOG_LEVEL);

struct memc_stm32_config {
	uint32_t fmc;
	struct stm32_pclken pclken;
	const struct pinctrl_dev_config *pcfg;
};

static int memc_stm32_init(const struct device *dev)
{
	const struct memc_stm32_config *config = dev->config;

	int r;
	const struct device *clk;

	/* configure pinmux */
	r = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
	if (r < 0) {
		LOG_ERR("FMC pinctrl setup failed (%d)", r);
		return r;
	}

	/* enable FMC peripheral clock */
	clk = DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE);

	r = clock_control_on(clk, (clock_control_subsys_t *)&config->pclken);
	if (r < 0) {
		LOG_ERR("Could not initialize FMC clock (%d)", r);
		return r;
	}

	return 0;
}

PINCTRL_DT_INST_DEFINE(0);

static const struct memc_stm32_config config = {
	.fmc = DT_INST_REG_ADDR(0),
	.pclken = { .bus = DT_INST_CLOCKS_CELL(0, bus),
		    .enr = DT_INST_CLOCKS_CELL(0, bits) },
	.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(0),
};

DEVICE_DT_INST_DEFINE(0, memc_stm32_init, NULL, NULL,
	      &config, POST_KERNEL, CONFIG_MEMC_INIT_PRIORITY, NULL);