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authorJens Gehrlein <jens.gehrlein@tqs.de>2007-09-27 14:54:46 +0200
committerWolfgang Denk <wd@denx.de>2007-12-27 01:59:33 +0100
commit492c7049869348d31168de8dad89651315e468e0 (patch)
tree573286b141da27fd8ee66b0a15f2876dd56ce55c /cpu/mpc8xx/speed.c
parentdabad4b9bc46908e301f73ce76b38b23626a96e9 (diff)
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TQM885D: fix SDRAM refresh
At 133 MHz the current SDRAM refresh rate is too fast (measured 4 * 1.17 us). CFG_MAMR_PTA changes from 39 to 128. This result in a refresh rate of 4 * 7.8 us at the default clock 66 MHz. At 133 MHz the value will be then 4 * 3.8 us. This is a compromise until a new method is found to adjust the refresh rate. Signed-off-by: Martin Krause <martin.krause@tqs.de>
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