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path: root/drivers/clk/mmp/clk-frac.c
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Diffstat (limited to 'drivers/clk/mmp/clk-frac.c')
-rw-r--r--drivers/clk/mmp/clk-frac.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index fabc09aca6c4..ed9928f5bdc7 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -28,13 +28,15 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
- unsigned long rate = 0, prev_rate;
+ u64 rate = 0, prev_rate;
int i;
for (i = 0; i < factor->ftbl_cnt; i++) {
prev_rate = rate;
- rate = (((*prate / 10000) * factor->ftbl[i].den) /
- (factor->ftbl[i].num * factor->masks->factor)) * 10000;
+ rate = *prate;
+ rate *= factor->ftbl[i].den;
+ do_div(rate, factor->ftbl[i].num * factor->masks->factor);
+
if (rate > drate)
break;
}
@@ -54,6 +56,7 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
struct mmp_clk_factor *factor = to_clk_factor(hw);
struct mmp_clk_factor_masks *masks = factor->masks;
unsigned int val, num, den;
+ u64 rate;
val = readl_relaxed(factor->base);
@@ -66,8 +69,11 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
if (!den)
return 0;
- return (((parent_rate / 10000) * den) /
- (num * factor->masks->factor)) * 10000;
+ rate = parent_rate;
+ rate *= den;
+ do_div(rate, num * factor->masks->factor);
+
+ return rate;
}
/* Configures new clock rate*/
@@ -78,12 +84,14 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long drate,
struct mmp_clk_factor_masks *masks = factor->masks;
int i;
unsigned long val;
- unsigned long rate = 0;
unsigned long flags = 0;
+ u64 rate = 0;
for (i = 0; i < factor->ftbl_cnt; i++) {
- rate = (((prate / 10000) * factor->ftbl[i].den) /
- (factor->ftbl[i].num * factor->masks->factor)) * 10000;
+ rate = prate;
+ rate *= factor->ftbl[i].den;
+ do_div(rate, factor->ftbl[i].num * factor->masks->factor);
+
if (rate > drate)
break;
}