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Clean up the TQM8xx_YYMHz configurations; allow to use the same

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binary image for all clock frequencies. Implement run-time
optimization of flash access timing based on the actual bus
frequency.
This commit is contained in:
wdenk
2004-04-24 23:23:30 +00:00
parent 5cf91d6bdc
commit e9132ea94c
16 changed files with 141 additions and 399 deletions
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28
cpu/mpc8xx/speed.c
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@@ -347,4 +347,32 @@ static long init_pll_866 (long clk)
#endif /* CONFIG_MPC866_et_al */
#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M)
/*
* Adjust sdram refresh rate to actual CPU clock
* and set timebase source according to actual CPU clock
*/
int adjust_sdram_tbs_8xx (void)
{
DECLARE_GLOBAL_DATA_PTR;
volatile immap_t *immr = (immap_t *) CFG_IMMR;
long mamr;
long sccr;
mamr = immr->im_memctl.memc_mamr;
mamr &= ~MAMR_PTA_MSK;
mamr |= ((gd->cpu_clk / CFG_PTA_PER_CLK) << MAMR_PTA_SHIFT);
immr->im_memctl.memc_mamr = mamr;
if (gd->cpu_clk < 67000000) {
sccr = immr->im_clkrst.car_sccr;
sccr |= SCCR_TBS;
immr->im_clkrst.car_sccr = sccr;
}
return (0);
}
#endif /* CONFIG_TQM8xxL/M, !TQM866M */
/* ------------------------------------------------------------------------- */