4  * SPDX-License-Identifier: Apache-2.0
24 #define EEPROM_MB85RSXX_WREN  0x06U /* Set Write Enable Latch	 */
25 #define EEPROM_MB85RSXX_WRDI  0x04U /* Reset Write Enable Latch */
27 #define EEPROM_MB85RSXX_WRSR  0x01U /* Write Status Register    */
29 #define EEPROM_MB85RSXX_WRITE 0x02U /* Write Memory Code		 */
35 #define EEPROM_MB85RSXX_STATUS_WPEN BIT(7) /* Status Register Write Protect  (RW) */
38 #define EEPROM_MB85RSXX_STATUS_WEL  BIT(1) /* Write Enable Latch			  (RO) */
64 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_read()
65 	struct eeprom_mb85rsxx_data *data = dev->data;  in eeprom_mb85rsxx_read()
70 	if (offset + len > config->size) {  in eeprom_mb85rsxx_read()
72 		return -EINVAL;  in eeprom_mb85rsxx_read()
107 	k_mutex_lock(&data->lock, K_FOREVER);  in eeprom_mb85rsxx_read()
109 	err = spi_transceive_dt(&config->spi, &tx, &rx);  in eeprom_mb85rsxx_read()
111 	k_mutex_unlock(&data->lock);  in eeprom_mb85rsxx_read()
122 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_wren()
133 	return spi_write_dt(&config->spi, &tx);  in eeprom_mb85rsxx_wren()
138 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_wrdi()
149 	return spi_write_dt(&config->spi, &tx);  in eeprom_mb85rsxx_wrdi()
155 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_write()
156 	struct eeprom_mb85rsxx_data *data = dev->data;  in eeprom_mb85rsxx_write()
161 	if (config->readonly) {  in eeprom_mb85rsxx_write()
162 		LOG_ERR("attempt to write to read-only device");  in eeprom_mb85rsxx_write()
163 		return -EACCES;  in eeprom_mb85rsxx_write()
166 	if (offset + len > config->size) {  in eeprom_mb85rsxx_write()
167 		LOG_ERR("attempt to write past device boundary");  in eeprom_mb85rsxx_write()
168 		return -EINVAL;  in eeprom_mb85rsxx_write()
191 	k_mutex_lock(&data->lock, K_FOREVER);  in eeprom_mb85rsxx_write()
195 		LOG_ERR("failed to disable write protection (err %d)", err);  in eeprom_mb85rsxx_write()
196 		k_mutex_unlock(&data->lock);  in eeprom_mb85rsxx_write()
200 	err = spi_write_dt(&config->spi, &tx);  in eeprom_mb85rsxx_write()
202 		LOG_ERR("failed to write to FRAM (err %d)", err);  in eeprom_mb85rsxx_write()
203 		k_mutex_unlock(&data->lock);  in eeprom_mb85rsxx_write()
209 		LOG_ERR("failed to disable write (err %d)", err);  in eeprom_mb85rsxx_write()
212 	k_mutex_unlock(&data->lock);  in eeprom_mb85rsxx_write()
219 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_size()
221 	return config->size;  in eeprom_mb85rsxx_size()
226 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_rdid()
227 	struct eeprom_mb85rsxx_data *data = dev->data;  in eeprom_mb85rsxx_rdid()
254 	k_mutex_lock(&data->lock, K_FOREVER);  in eeprom_mb85rsxx_rdid()
255 	err = spi_transceive_dt(&config->spi, &tx, &rx);  in eeprom_mb85rsxx_rdid()
256 	k_mutex_unlock(&data->lock);  in eeprom_mb85rsxx_rdid()
269 		return -EIO;  in eeprom_mb85rsxx_rdid()
278 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_init()
279 	struct eeprom_mb85rsxx_data *data = dev->data;  in eeprom_mb85rsxx_init()
282 	k_mutex_init(&data->lock);  in eeprom_mb85rsxx_init()
284 	if (!spi_is_ready_dt(&config->spi)) {  in eeprom_mb85rsxx_init()
286 		return -EINVAL;  in eeprom_mb85rsxx_init()
300 	.write = &eeprom_mb85rsxx_write,