tree a011e33764deec5b848280f3f2ed386f60967929
parent 6e5221558d35563dc656833a021543fba8185c41
author Kamal Dasu <kdasu.kdev@gmail.com> 1398991879 -0400
committer Brian Norris <computersforpeace@gmail.com> 1400628932 -0700

mtd: nand: Add support to use nand_base poi databuf as bounce buffer

nand_base can be passed a kmap()'d buffers from highmem by
filesystems like jffs2. This results in failure to map the
physical address of the DMA buffer on various contoller
driver on different platforms. This change adds a chip option
to use preallocated databuf as bounce buffers used in
nand_do_read_ops() and nand_do_write_ops().
This allows for specific nand controller driver to set this
option as needed.

Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>