4  * SPDX-License-Identifier: Apache-2.0
32 #define EEPROM_AT25_STATUS_WIP BIT(0) /* Write-In-Process   (RO) */
49 	} bus;  member
57 	uint16_t timeout;  member
70 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_write_protect()
72 	if (!config->wp_gpio.port) {  in eeprom_at2x_write_protect()
76 	return gpio_pin_set_dt(&config->wp_gpio, 1);  in eeprom_at2x_write_protect()
81 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_write_enable()
83 	if (!config->wp_gpio.port) {  in eeprom_at2x_write_enable()
87 	return gpio_pin_set_dt(&config->wp_gpio, 0);  in eeprom_at2x_write_enable()
94 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_read()
95 	struct eeprom_at2x_data *data = dev->data;  in eeprom_at2x_read()
103 	if ((offset + len) > config->size) {  in eeprom_at2x_read()
105 		return -EINVAL;  in eeprom_at2x_read()
108 	k_mutex_lock(&data->lock, K_FOREVER);  in eeprom_at2x_read()
110 		ret = config->read_fn(dev, offset, pbuf, len);  in eeprom_at2x_read()
113 			k_mutex_unlock(&data->lock);  in eeprom_at2x_read()
119 		len -= ret;  in eeprom_at2x_read()
122 	k_mutex_unlock(&data->lock);  in eeprom_at2x_read()
131 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_limit_write_count()
136 	if (count > config->pagesize) {  in eeprom_at2x_limit_write_count()
137 		count = config->pagesize;  in eeprom_at2x_limit_write_count()
141 	page_boundary = ROUND_UP(offset + 1, config->pagesize);  in eeprom_at2x_limit_write_count()
143 		count = page_boundary - offset;  in eeprom_at2x_limit_write_count()
153 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_write()
154 	struct eeprom_at2x_data *data = dev->data;  in eeprom_at2x_write()
158 	if (config->readonly) {  in eeprom_at2x_write()
159 		LOG_WRN("attempt to write to read-only device");  in eeprom_at2x_write()
160 		return -EACCES;  in eeprom_at2x_write()
167 	if ((offset + len) > config->size) {  in eeprom_at2x_write()
169 		return -EINVAL;  in eeprom_at2x_write()
172 	k_mutex_lock(&data->lock, K_FOREVER);  in eeprom_at2x_write()
177 		LOG_ERR("failed to write-enable EEPROM (err %d)", ret);  in eeprom_at2x_write()
178 		k_mutex_unlock(&data->lock);  in eeprom_at2x_write()
184 		ret = config->write_fn(dev, offset, pbuf, len);  in eeprom_at2x_write()
190 			k_mutex_unlock(&data->lock);  in eeprom_at2x_write()
196 		len -= ret;  in eeprom_at2x_write()
202 		LOG_ERR("failed to write-protect EEPROM (err %d)", ret);  in eeprom_at2x_write()
208 	k_mutex_unlock(&data->lock);  in eeprom_at2x_write()
215 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_size()
217 	return config->size;  in eeprom_at2x_size()
224 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at24_bus_is_ready()
226 	return device_is_ready(config->bus.i2c.bus);  in eeprom_at24_bus_is_ready()
239 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at24_translate_offset()
241 	const uint16_t addr_incr = *offset >> config->addr_width;  in eeprom_at24_translate_offset()
242 	*offset &= BIT_MASK(config->addr_width);  in eeprom_at24_translate_offset()
244 	return config->bus.i2c.addr + addr_incr;  in eeprom_at24_translate_offset()
250 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at24_adjust_read_count()
251 	const size_t remainder = BIT(config->addr_width) - offset;  in eeprom_at24_adjust_read_count()
263 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at24_read()
264 	int64_t timeout;  in eeprom_at24_read()  local
271 	if (config->addr_width == 16) {  in eeprom_at24_read()
283 	timeout = k_uptime_get() + config->timeout;  in eeprom_at24_read()
286 		err = i2c_write_read(config->bus.i2c.bus, bus_addr,  in eeprom_at24_read()
287 				     addr, config->addr_width / 8,  in eeprom_at24_read()
289 		if (!err || now > timeout) {  in eeprom_at24_read()
305 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at24_write()
307 	uint8_t block[config->addr_width / 8 + count];  in eeprom_at24_write()
308 	int64_t timeout;  in eeprom_at24_write()  local
320 	if (config->addr_width == 16) {  in eeprom_at24_write()
331 	timeout = k_uptime_get() + config->timeout;  in eeprom_at24_write()
334 		err = i2c_write(config->bus.i2c.bus, block, sizeof(block),  in eeprom_at24_write()
336 		if (!err || now > timeout) {  in eeprom_at24_write()
354 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at25_bus_is_ready()
356 	return spi_is_ready_dt(&config->bus.spi);  in eeprom_at25_bus_is_ready()
361 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at25_rdsr()
382 	err = spi_transceive_dt(&config->bus.spi, &tx, &rx);  in eeprom_at25_rdsr()
392 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at25_wait_for_idle()
393 	int64_t timeout;  in eeprom_at25_wait_for_idle()  local
397 	timeout = k_uptime_get() + config->timeout;  in eeprom_at25_wait_for_idle()
409 		if (now > timeout) {  in eeprom_at25_wait_for_idle()
415 	return -EBUSY;  in eeprom_at25_wait_for_idle()
421 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at25_read()
422 	size_t cmd_len = 1 + config->addr_width / 8;  in eeprom_at25_read()
453 	if ((offset + len) > config->size) {  in eeprom_at25_read()
455 		return -EINVAL;  in eeprom_at25_read()
459 	switch (config->addr_width) {  in eeprom_at25_read()
475 		LOG_ERR("EEPROM idle wait failed (err %d)", err);  in eeprom_at25_read()
479 	err = spi_transceive_dt(&config->bus.spi, &tx, &rx);  in eeprom_at25_read()
489 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at25_wren()
500 	return spi_write_dt(&config->bus.spi, &tx);  in eeprom_at25_wren()
506 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at25_write()
509 	size_t cmd_len = 1 + config->addr_width / 8;  in eeprom_at25_write()
528 	switch (config->addr_width) {  in eeprom_at25_write()
544 		LOG_ERR("EEPROM idle wait failed (err %d)", err);  in eeprom_at25_write()
554 	err = spi_transceive_dt(&config->bus.spi, &tx, NULL);  in eeprom_at25_write()
565 	const struct eeprom_at2x_config *config = dev->config;  in eeprom_at2x_init()
566 	struct eeprom_at2x_data *data = dev->data;  in eeprom_at2x_init()
568 	k_mutex_init(&data->lock);  in eeprom_at2x_init()
570 	if (!config->bus_is_ready(dev)) {  in eeprom_at2x_init()
571 		LOG_ERR("parent bus device not ready");  in eeprom_at2x_init()
572 		return -EINVAL;  in eeprom_at2x_init()
576 	if (config->wp_gpio.port) {  in eeprom_at2x_init()
578 		if (!gpio_is_ready_dt(&config->wp_gpio)) {  in eeprom_at2x_init()
580 			return -EINVAL;  in eeprom_at2x_init()
583 		err = gpio_pin_configure_dt(&config->wp_gpio, GPIO_OUTPUT_ACTIVE);  in eeprom_at2x_init()
609 	BUILD_ASSERT((page != 0U) && ((page & (page - 1)) == 0U),	\
637 		.bus = EEPROM_AT##t##_BUS(n, t), \
643 		.timeout = DT_PROP(INST_DT_AT2X(n, t), timeout), \