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authorStefan Roese <sr@denx.de>2008-01-05 09:12:41 +0100
committerStefan Roese <sr@denx.de>2008-01-05 09:12:41 +0100
commit845c6c95dbfe6c915ce68a0a115852fa17932fb4 (patch)
treeb935ef67e63cae739a497daf7e70869653c1b2cb /doc/README.amigaone
parent5c740711f0ea5b51414b341b71597c4a0751be74 (diff)
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ppc4xx: Update Katmai/44x_spd_ddr2.c code for optimal DDR2 setup
On Katmai the complete auto-calibration somehow doesn't seem to produce the best results, meaning optimal values for RQFD/RFFD. This was discovered by GDA using a high bandwidth scope, analyzing the DDR2 signals. GDA provided a fixed value for RQFD, so now on Katmai "only" RFFD is auto-calibrated. This patch also adds RDCC calibration as mentioned on page 7 of the AMCC PowerPC440SP/SPe DDR2 application note: "DDR1/DDR2 Initialization Sequence and Dynamic Tuning" Signed-off-by: Stefan Roese <sr@denx.de>
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