4  * SPDX-License-Identifier: Apache-2.0
26 #define EEPROM_MB85RSXX_RDSR  0x05U /* Read Status Register     */
28 #define EEPROM_MB85RSXX_READ  0x03U /* Read Memory Code		 */
30 #define EEPROM_MB85RSXX_RDID  0x9FU /* Read Device ID			 */
31 #define EEPROM_MB85RSXX_FSTRD 0x0BU /* Fast Read Memory Code	 */
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()
66 	uint8_t cmd[4] = {EEPROM_MB85RSXX_READ, 0, 0, 0};  in eeprom_mb85rsxx_read()  local
67 	uint8_t *paddr = &cmd[1];  in eeprom_mb85rsxx_read()
70 	if (offset + len > config->size) {  in eeprom_mb85rsxx_read()
71 		LOG_ERR("attempt to read past device boundary");  in eeprom_mb85rsxx_read()
72 		return -EINVAL;  in eeprom_mb85rsxx_read()
85 		.buf = cmd,  in eeprom_mb85rsxx_read()
86 		.len = sizeof(cmd),  in eeprom_mb85rsxx_read()
95 			.len = sizeof(cmd),  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()
114 		LOG_ERR("failed to read FRAM (err %d)", err);  in eeprom_mb85rsxx_read()
122 	const struct eeprom_mb85rsxx_config *config = dev->config;  in eeprom_mb85rsxx_wren()
123 	uint8_t cmd = EEPROM_MB85RSXX_WREN;  in eeprom_mb85rsxx_wren()  local
125 		.buf = &cmd,  in eeprom_mb85rsxx_wren()
126 		.len = sizeof(cmd),  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()
139 	uint8_t cmd = EEPROM_MB85RSXX_WRDI;  in eeprom_mb85rsxx_wrdi()  local
141 		.buf = &cmd,  in eeprom_mb85rsxx_wrdi()
142 		.len = sizeof(cmd),  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()
157 	uint8_t cmd[4] = {EEPROM_MB85RSXX_WRITE, 0, 0, 0};  in eeprom_mb85rsxx_write()  local
158 	uint8_t *paddr = &cmd[1];  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()
168 		return -EINVAL;  in eeprom_mb85rsxx_write()
178 			.buf = cmd,  in eeprom_mb85rsxx_write()
179 			.len = sizeof(cmd),  in eeprom_mb85rsxx_write()
191 	k_mutex_lock(&data->lock, K_FOREVER);  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()
203 		k_mutex_unlock(&data->lock);  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()
229 	uint8_t cmd = EEPROM_MB85RSXX_RDID;  in eeprom_mb85rsxx_rdid()  local
233 		.buf = &cmd,  in eeprom_mb85rsxx_rdid()
234 		.len = sizeof(cmd),  in eeprom_mb85rsxx_rdid()
243 			.len = sizeof(cmd),  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()
259 		LOG_ERR("failed to read RDID (err %d)", err);  in eeprom_mb85rsxx_rdid()
269 		return -EIO;  in eeprom_mb85rsxx_rdid()
272 	LOG_INF("device ID read successfully: %02X %02X %02X %02X", id[0], id[1], id[2], id[3]);  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()
299 	.read = &eeprom_mb85rsxx_read,