[ARM] pxa: cpufreq-pxa2xx: fix DRI recomputation routine
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>
diff --git a/arch/arm/mach-pxa/cpufreq-pxa2xx.c b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
index 9e4d981..268a9bc 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa2xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
@@ -256,13 +256,9 @@
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 */