Date: Sun, 19 Feb 2006 08:03:08 GMT From: Warner Losh <imp@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 92031 for review Message-ID: <200602190803.k1J838Pv009526@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=92031 Change 92031 by imp@imp_plunger on 2006/02/19 08:02:58 More constants. Affected files ... .. //depot/projects/arm/src/sys/arm/at91/at91_pmc.c#6 edit .. //depot/projects/arm/src/sys/arm/at91/at91_pmcreg.h#3 edit Differences ... ==== //depot/projects/arm/src/sys/arm/at91/at91_pmc.c#6 (text+ko) ==== @@ -196,10 +196,9 @@ at91_pmc_pll_calc(uint32_t main_freq, uint32_t out_freq) { uint32_t i, div = 0, mul = 0, diff = 1 << 30; - unsigned ret = (out_freq > 155000000) ? 0xbe00 : 0x3e00; + unsigned ret = (out_freq > PMC_PLL_FAST_THRESH) ? 0xbe00 : 0x3e00; - /* PLL output max 240 MHz (or 180 MHz per errata) */ - if (out_freq > 240000000) + if (out_freq > PMC_PLL_MAX_OUT_FREQ) goto fail; for (i = 1; i < 256; i++) { ==== //depot/projects/arm/src/sys/arm/at91/at91_pmcreg.h#3 (text+ko) ==== @@ -104,9 +104,17 @@ #define PMC_PLL_MIN_IN_FREQ 100000 #define PMC_PLL_MAX_IN_FREQ 32000000 +/* + * PLL Max output frequency is 240MHz. The errata says 180MHz is the max + * for some revisions of this part. Be more permissive and optimistic. + */ +#define PMC_PLL_MAX_OUT_FREQ 240000000 + #define PMC_PLL_MULT_MIN 2 #define PMC_PLL_MULT_MAX 2048 #define PMC_PLL_SHIFT_TOL 5 /* Allow errors 1 part in 32 */ +#define PMC_PLL_FAST_THRESH 155000000 + #endif /* ARM_AT91_AT91_PMCREG_H */
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