shell: flash: display capacity and usage

source/shell/flash.c

@@ -105,13 +105,14 @@ static void do_flash_probe(const char *s)
 	}
 
 	if (!(flash = flash_probe())) {
-		fprintf(stderr, "error: unable to probe flash device.\n");
+		fprintf(stderr, "error: unable to probe the flash device.\n");
+		return;
 	}
 }
 
 static void do_flash_info(const char *s)
 {
-	size_t size;
+	size_t size, capacity;
 
 	(void)s;
 
@@ -121,10 +122,10 @@ static void do_flash_info(const char *s)
 	}
 
 	size = flash_get_size(flash);
+	capacity = flash_get_capacity(flash);
 
-	printf("Capacity: %" PRSZu " blocks (", size / (4 * KIB));
-	print_size(size);
-	printf(")\n");
+	printf("  size: %" PRSZu "/%" PRSZu " bytes (%" PRSZu "%% usage)\n",
+		size, capacity, 100 * size / capacity);
 }
 
 static void do_flash_read(const char *s)