Define the MAX_CLUSTSIZE to default of 65536 only if
CONFIG_FS_FAT_MAX_CLUSTSIZE is not defined in board
specific config file.
Also please define your own MAX_CLUSTSIZE value if
CONFIG_FS_FAT_MAX_CLUSTSIZE is defined.
This option has been provided to save memory in some
memory constrained cases.
Signed-off-by: Siva Durga Prasad Paladugu <siva...@xilinx.com>
---
Changes in v2:
-Defined CONFIG_FS_FAT_MAX_CLUSTSIZE and documented as
per review comment.
README | 7 +++++++
include/fat.h | 2 ++
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/README b/README
index 5f89552..0d947cb 100644
--- a/README
+++ b/README
@@ -1613,6 +1613,13 @@ CBFS (Coreboot Filesystem) support
filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls
and cbfsload.
+- FAT(File Allocation Table) filesystem write/read buffer size:
+ CONFIG_FS_FAT_MAX_CLUSTSIZE
+
+ If this macro is not defined then the default MAX_CLUSTSIZE
+ is defined with 65536 else specify your own MAX_CLUSTSSIZE
+ value.
+
- Keyboard Support:
CONFIG_ISA_KEYBOARD
diff --git a/include/fat.h b/include/fat.h
index 81d9790..8b67851 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -18,7 +18,9 @@
#define VFAT_MAXSEQ 9 /* Up to 9 of 13 2-byte UTF-16 entries */
#define PREFETCH_BLOCKS 2
+#ifndef CONFIG_FS_FAT_MAX_CLUSTSIZE
#define MAX_CLUSTSIZE 65536
+#endif
#define DIRENTSPERBLOCK (mydata->sect_size / sizeof(dir_entry))
#define DIRENTSPERCLUST ((mydata->clust_size * mydata->sect_size) / \
sizeof(dir_entry))
--
1.7.4
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