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[ARM] pxa: cpufreq-pxa2xx: fix DRI recomputation routine

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This patch:
1) Simpifies the DRI recomputation routine by pulling out the common code
2) Fixes a bug in PXA27x DRI recomputation caused by incorrect parenthesis

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Marek Vasut 2010-06-24 15:57:12 +02:00 committed by Eric Miao
parent 5852984a8b
commit 0357ae8f8c
1 changed files with 2 additions and 6 deletions
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8
arch/arm/mach-pxa/cpufreq-pxa2xx.c
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@ -256,13 +256,9 @@ static void init_sdram_rows(void)
static u32 mdrefr_dri(unsigned int freq)
{
u32 dri = 0;
u32 interval = freq * SDRAM_TREF / sdram_rows;
if (cpu_is_pxa25x())
dri = ((freq * SDRAM_TREF) / (sdram_rows * 32));
if (cpu_is_pxa27x())
dri = ((freq * SDRAM_TREF) / (sdram_rows - 31)) / 32;
return dri;
return (interval - (cpu_is_pxa27x() ? 31 : 0)) / 32;
}
/* find a valid frequency point */