drivers: flash: sam: fix flash erase last page

drivers/flash/flash_sam.c

@@ -396,17 +396,12 @@ static bool sam_flash_erase_foreach_page(const struct flash_pages_info *info, vo
 	/* Check if we've reached the end of pages to erase */
 	if (info->start_offset >= erase_data->section_end) {
 		/* Succeeded, stop iterating */
-		erase_data->succeeded = true;
 		return false;
 	}
 
-	if (sam_flash_unlock_page(dev, info) < 0) {
-		/* Failed to unlock page, stop iterating */
-		return false;
-	}
-
-	if (sam_flash_erase_page(dev, info) < 0) {
-		/* Failed to erase page, stop iterating */
+	if (sam_flash_unlock_page(dev, info) || sam_flash_erase_page(dev, info)) {
+		/* Failed to unlock page and erase page, stop iterating */
+		erase_data->succeeded = false;
 		return false;
 	}
 
@@ -436,7 +431,7 @@ static int sam_flash_erase(const struct device *dev, off_t offset, size_t size)
 	key = k_spin_lock(&sam_data->lock);
 	sam_data->erase_data.section_start = offset;
 	sam_data->erase_data.section_end = offset + size;
-	sam_data->erase_data.succeeded = false;
+	sam_data->erase_data.succeeded = true;
 	flash_page_foreach(dev, sam_flash_erase_foreach_page, sam_data);
 	if (!sam_data->erase_data.succeeded) {
 		k_spin_unlock(&sam_data->lock, key);

dts/arm/atmel/samx7xx21.dtsi

@@ -16,7 +16,7 @@
 		flash-controller@400e0c00 {
 			flash0: flash@400000 {
 				reg = <0x00400000 DT_SIZE_K(2048)>;
-				erase-blocks = <&eefc 8 2048>, <&eefc 252 8192>;
+				erase-blocks = <&eefc 8 2048>, <&eefc 254 8192>;
 			};
 		};
 	};