[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>

1 files changed, 2 insertions, 6 deletions

diff --git a/arch/arm/mach-pxa/cpufreq-pxa2xx.c b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
index 9e4d9816726a..268a9bc6be8a 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa2xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
@@ -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 */