On Thu, Nov 13, 2014 at 03:43:39AM +0100, Stefan Roese wrote: > The functions to detect the state of the ready / busy signal is already > available but only used in the SPL case. Lets use it always, also for the > main U-Boot. As all boards should have this HW connection. > > Testing on Siemens Draco (am335x) showed a small perfomance gain by using > this ready pin to detect the NAND chip state. Here the values tested on > Draco with Hynix 4GBit NAND: > > Without NAND ready pin: > > U-Boot# time nand read 80400000 0 400000 > > NAND read: device 0 offset 0x0, size 0x400000 > 4194304 bytes read: OK > > time: 2.947 seconds, 2947 ticks > > With NAND ready pin: > > U-Boot# time nand read 80400000 0 400000 > > NAND read: device 0 offset 0x0, size 0x400000 > 4194304 bytes read: OK > > time: 2.795 seconds, 2795 ticks > > So an increase of approx. 5%. > > Signed-off-by: Stefan Roese <s...@denx.de> > Cc: Tom Rini <tr...@ti.com> > Cc: Scott Wood <scottw...@freescale.com> > Cc: Roger Meier <r.me...@siemens.com> > Cc: Samuel Egli <samuel.e...@siemens.com>
Applied to u-boot-ti/master, thanks! -- Tom
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