On Thu, 2013-11-14 at 09:18 +0100, Holger Brunck wrote: > Hi Scott, > > On 11/14/2013 02:31 AM, Scott Wood wrote: > > On Mon, Aug 26, 2013 at 02:10:56PM +0200, Phil Sutter wrote: > >> From: Nico Erfurth <[email protected]> > >> > >> The basic idea is taken from the linux-kernel, but further optimized. > >> > >> First align the buffer to 8 bytes, then use ldrd/strd to read and store > >> in 8 byte quantities, then do the final bytes. > >> > >> Tested using: 'date ; nand read.raw 0xE00000 0x0 0x10000 ; date'. > >> Without this patch, NAND read of 132MB took 49s (~2.69MB/s). With this > >> patch in place, reading the same amount of data was done in 27s > >> (~4.89MB/s). So read performance is increased by ~80%! > >> > >> Signed-off-by: Nico Erfurth <[email protected]> > >> Tested-by: Phil Sutter <[email protected]> > >> Cc: Prafulla Wadaskar <[email protected]> > >> > >> --- > >> Changed since V3: > >> - fixed author > >> --- > >> drivers/mtd/nand/kirkwood_nand.c | 32 ++++++++++++++++++++++++++++++++ > >> 1 file changed, 32 insertions(+) > > > > I tried to build-test this, and I couldn't find any board that defines > > CONFIG_NAND_KIRKWOOD. > > > > it's not in board specific code defined it's defined in a common kirkwood > header: > > arch/arm/include/asm/arch-kirkwood/config.h:58:#define CONFIG_NAND_KIRKWOOD
Oops. I thought I grepped the whole tree rather than just include/, but apparently not. -Scott _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
