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authorYibo Cai <yibo.cai@csr.com>2015-08-04 17:45:29 +0300
committerMichael Turquette <mturquette@baylibre.com>2015-08-25 02:49:06 +0300
commitd1ccbddd090b74b8027727cb543b9c23d7f0f23e (patch)
tree15d05c56ebd6e85d6382c63659165445a19eedc8 /drivers/clk/sirf
parent6132e89aef51df044246b5aef822144217794ae1 (diff)
downloadlinux-d1ccbddd090b74b8027727cb543b9c23d7f0f23e.tar.xz
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>
Diffstat (limited to 'drivers/clk/sirf')
-rw-r--r--drivers/clk/sirf/clk-atlas7.c13
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);