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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>
hifive-unleashed-5.1
Yibo Cai 2015-08-04 14:45:29 +00:00 committed by Michael Turquette
parent 6132e89aef
commit d1ccbddd09
1 changed files with 8 additions and 5 deletions
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13
drivers/clk/sirf/clk-atlas7.c
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@ -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);