From: Tien Fong Chee <tien.fong.c...@intel.com>
Most of the time SPL only needs very simple FAT reading, so having
CONFIG_SPL_FAT_WRITE to exclude or undefined would help to save 64KiB
default max clustersize from memory.
Signed-off-by: Tien Fong Chee <tien.fong.c...@intel.com>
---
common/spl/Kconfig | 7 +++++++
fs/fat/Makefile | 7 ++++++-
fs/fat/fat.c | 4 +++-
fs/fs.c | 3 ++-
4 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 0ddbffc..dad4c11 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -403,6 +403,13 @@ config SPL_FAT_SUPPORT
filesystem from within SPL. Support for the underlying block
device (e.g. MMC or USB) must be enabled separately.
+config SPL_FAT_WRITE
+ bool "Support write for FAT filesystems"
+ help
+ Enable write support for FAT and VFAT filesystems with SPL.
+ Support for the underlying block device (e.g. MMC or USB) must be
+ enabled separately.
+
config SPL_FPGA_SUPPORT
bool "Support FPGAs"
help
diff --git a/fs/fat/Makefile b/fs/fat/Makefile
index e64b61a..654b8c3 100644
--- a/fs/fat/Makefile
+++ b/fs/fat/Makefile
@@ -1,5 +1,10 @@
# SPDX-License-Identifier: GPL-2.0+
#
+ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_FS_FAT) := fat.o
-obj-$(CONFIG_FAT_WRITE):= fat_write.o
+obj-$(CONFIG_SPL_FAT_WRITE) = fat_write.o
+else
+obj-$(CONFIG_FS_FAT) := fat.o
+obj-$(CONFIG_FAT_WRITE) = fat_write.o
+endif
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index ac8913e..8803fb4 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -145,7 +145,9 @@ static void get_name(dir_entry *dirent, char *s_name)
}
static int flush_dirty_fat_buffer(fsdata *mydata);
-#if !defined(CONFIG_FAT_WRITE)
+
+#if (!defined(CONFIG_SPL_BUILD) && !defined(CONFIG_FAT_WRITE)) || \
+ (defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_FAT_WRITE))
/* Stub for read only operation */
int flush_dirty_fat_buffer(fsdata *mydata)
{
diff --git a/fs/fs.c b/fs/fs.c
index cb26517..0b8088b 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -168,7 +168,8 @@ static struct fstype_info fstypes[] = {
.exists = fat_exists,
.size = fat_size,
.read = fat_read_file,
-#ifdef CONFIG_FAT_WRITE
+#if (!defined(CONFIG_SPL_BUILD) && defined(CONFIG_FAT_WRITE)) || \
+ (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_FAT_WRITE))
.write = file_fat_write,
.unlink = fat_unlink,
.mkdir = fat_mkdir,
--
1.7.7.4
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