> -----Original Message----- > From: Kumar Gala [mailto:[EMAIL PROTECTED] > Sent: Friday, November 21, 2008 7:43 PM > To: Liu Dave-R63238 > Cc: [email protected] > Subject: Re: [U-Boot] [PATCH 5/5] 85xx: enable the auto self > refresh for wake up ARP > > > On Nov 21, 2008, at 2:31 AM, Dave Liu wrote: > > > The wake up ARP feature need use the memory to process > > wake up packet, we enable auto self refresh to support it. > > > > Signed-off-by: Dave Liu <[EMAIL PROTECTED]> > > --- > > board/freescale/mpc8536ds/ddr.c | 6 ++++++ > > 1 files changed, 6 insertions(+), 0 deletions(-) > > > > diff --git a/board/freescale/mpc8536ds/ddr.c b/board/freescale/ > > mpc8536ds/ddr.c > > index 3135d6d..2bad787 100644 > > --- a/board/freescale/mpc8536ds/ddr.c > > +++ b/board/freescale/mpc8536ds/ddr.c > > @@ -79,4 +79,10 @@ void > fsl_ddr_board_options(memctl_options_t *popts, > > * - number of DIMMs installed > > */ > > popts->half_strength_driver_enable = 0; > > + > > + /* > > + * For wake up arp feature, we need enable auto self refresh > > + */ > > + popts->auto_self_refresh_en = 1; > > + popts->sr_it = 0x6; > > any reason we picked 6?
That is balance for performance and respond time. the 6 stand for 3ms time (3ns MCLK) _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
