FAT: Make it possible to read from any file position
When storage devices contain files larger than the embedded RAM, it is
useful to be able to read these files by chunks, e.g. for a software
update to the embedded NAND Flash from an external storage device (USB
stick, SD card, etc.).
Hence, this patch makes it possible by adding a new FAT API to read
files from a given position. This patch also adds this feature to the
fatload command.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Wolfgang Denk <wd@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/include/fat.h b/include/fat.h
index f1b4a0d..cc85b06 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -208,6 +208,8 @@
int file_cd(const char *path);
int file_fat_detectfs(void);
int file_fat_ls(const char *dir);
+long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+ unsigned long maxsize);
long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
const char *file_getfsname(int idx);
int fat_register_device(block_dev_desc_t *dev_desc, int part_no);