drivers: flash: flash_mcux_flexspi_nor: add IS25LP support

IS25LP flash chips have a similar P[6:3] register to the IS25WP series,
and need the same workaround.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

drivers/flash/flash_mcux_flexspi_nor.c

@@ -936,6 +936,7 @@ static int flash_flexspi_nor_check_jedec(struct flash_flexspi_nor_data *data,
 {
 	int ret;
 	uint32_t vendor_id;
+	uint32_t read_params;
 
 	ret = flash_flexspi_nor_read_id_helper(data, (uint8_t *)&vendor_id);
 	if (ret < 0) {
@@ -944,13 +945,26 @@ static int flash_flexspi_nor_check_jedec(struct flash_flexspi_nor_data *data,
 
 	/* Switch on manufacturer and vendor ID */
 	switch (vendor_id & 0xFFFF) {
+	case 0x609d: /* IS25LP flash, needs P[4:3] cleared with same method as IS25WP */
+		read_params = 0xE0U;
+		ret = flash_flexspi_nor_is25_clear_read_param(data, flexspi_lut, &read_params);
+		if (ret < 0) {
+			while (1) {
+				/*
+				 * Spin here, this flash won't configure correctly.
+				 * We can't print a warning, as we are unlikely to
+				 * be able to XIP at this point.
+				 */
+			}
+		}
+		/* Still return an error- we want the JEDEC configuration to run */
+		return -ENOTSUP;
 	case 0x709d:
 		/*
 		 * IS25WP flash. We can support this flash with the JEDEC probe,
 		 * but we need to insure P[6:3] are at the default value
 		 */
-		/* Install Set Read Parameters (Volatile) command */
-		uint32_t read_params = 0;
+		read_params = 0;
 		ret = flash_flexspi_nor_is25_clear_read_param(data, flexspi_lut, &read_params);
 		if (ret < 0) {
 			while (1) {