clk: atlas7: replace dto resolution magic number by macro

Signed-off-by: Yibo Cai <yibo.cai@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/clk/sirf/clk-atlas7.c b/drivers/clk/sirf/clk-atlas7.c
index ed77fd51692c..3d4217f38419 100644
--- a/drivers/clk/sirf/clk-atlas7.c
+++ b/drivers/clk/sirf/clk-atlas7.c
@@ -465,6 +465,9 @@ static struct clk_pll clk_sys3pll = {
  *  double resolution mode:fout = fin * finc / 2^29
  *  normal mode:fout = fin * finc / 2^28
  */
+#define DTO_RESL_DOUBLE (1ULL << 29)
+#define DTO_RESL_NORMAL (1ULL << 28)
+
 static int dto_clk_is_enabled(struct clk_hw *hw)
 {
         struct clk_dto *clk = to_dtoclk(hw);
@@ -509,9 +512,9 @@ static unsigned long dto_clk_recalc_rate(struct clk_hw *hw,
         rate *= finc;
         if (droff & BIT(0))
                 /* Double resolution off */
-                do_div(rate, 1 << 28);
+                do_div(rate, DTO_RESL_NORMAL);
         else
-                do_div(rate, 1 << 29);
+                do_div(rate, DTO_RESL_DOUBLE);
 
         return rate;
 }
@@ -519,11 +522,11 @@ static unsigned long dto_clk_recalc_rate(struct clk_hw *hw,
 static long dto_clk_round_rate(struct clk_hw *hw, unsigned long rate,
         unsigned long *parent_rate)
 {
-        u64 dividend = (u64)rate * (1 << 29);
+        u64 dividend = rate * DTO_RESL_DOUBLE;
 
         do_div(dividend, *parent_rate);
         dividend *= *parent_rate;
-        do_div(dividend, 1 << 29);
+        do_div(dividend, DTO_RESL_DOUBLE);
 
         return dividend;
 }
@@ -531,7 +534,7 @@ static long dto_clk_round_rate(struct clk_hw *hw, unsigned long rate,
 static int dto_clk_set_rate(struct clk_hw *hw, unsigned long rate,
         unsigned long parent_rate)
 {
-        u64 dividend = (u64)rate * (1 << 29);
+        u64 dividend = rate * DTO_RESL_DOUBLE;
         struct clk_dto *clk = to_dtoclk(hw);
 
         do_div(dividend, parent_rate);