From 151ca3a31f472d05dfe4eb711a94ac8f4c786da5 Mon Sep 17 00:00:00 2001
From: Xudong Zheng <7pkvm5aw@slicealias.com>
Date: Fri, 17 Jan 2025 16:52:50 -0500
Subject: [PATCH] fs: littlefs: define default disk version in Kconfig

This makes it possible to set the disk version when Devicetree is not
used for configuration.

Signed-off-by: Xudong Zheng <7pkvm5aw@slicealias.com>
---
 subsys/fs/Kconfig.littlefs | 7 +++++++
 subsys/fs/littlefs_fs.c    | 5 ++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/subsys/fs/Kconfig.littlefs b/subsys/fs/Kconfig.littlefs
index b7e1c4bf8d4..72de8279c1a 100644
--- a/subsys/fs/Kconfig.littlefs
+++ b/subsys/fs/Kconfig.littlefs
@@ -125,4 +125,11 @@ config FS_LITTLEFS_DISK_VERSION
 	  to maintain backward compatibility with existing littlefs
 	  with the same major disk version.
 
+config FS_LITTLEFS_DISK_VERSION_NUMBER
+	hex "Default littlefs disk version"
+	default 0
+	depends on FS_LITTLEFS_DISK_VERSION
+	help
+	  Set to 0 to use the latest littlefs disk version (LFS_DISK_VERSION).
+
 endif # FILE_SYSTEM_LITTLEFS
diff --git a/subsys/fs/littlefs_fs.c b/subsys/fs/littlefs_fs.c
index 7cd05d5be33..7cf8aaa44c7 100644
--- a/subsys/fs/littlefs_fs.c
+++ b/subsys/fs/littlefs_fs.c
@@ -793,7 +793,10 @@ static int littlefs_init_cfg(struct fs_littlefs *fs, int flags)
 	uint32_t disk_version = lcp->disk_version;
 
 	if (disk_version == 0) {
-		disk_version = LFS_DISK_VERSION;
+		disk_version = CONFIG_FS_LITTLEFS_DISK_VERSION_NUMBER;
+		if (disk_version == 0) {
+			disk_version = LFS_DISK_VERSION;
+		}
 	}
 #endif /* CONFIG_FS_LITTLEFS_DISK_VERSION */