static size_t dataflash_disk_page_read(struct BattFsSuper *d, pgcnt_t page, pgaddr_t addr, void *buf, size_t len)
{
DataFlash *fd = DATAFLASH_CAST((KFile *)d->disk_ctx);
static size_t dataflash_disk_page_read(struct BattFsSuper *d, pgcnt_t page, pgaddr_t addr, void *buf, size_t len)
{
DataFlash *fd = DATAFLASH_CAST((KFile *)d->disk_ctx);