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Diffstat (limited to 'kernel/drivers/clk/mxs/clk-frac.c')
-rw-r--r--kernel/drivers/clk/mxs/clk-frac.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/kernel/drivers/clk/mxs/clk-frac.c b/kernel/drivers/clk/mxs/clk-frac.c
index e6aa6b567..f8dd10f6d 100644
--- a/kernel/drivers/clk/mxs/clk-frac.c
+++ b/kernel/drivers/clk/mxs/clk-frac.c
@@ -9,7 +9,6 @@
* http://www.gnu.org/copyleft/gpl.html
*/
-#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/io.h>
@@ -42,11 +41,13 @@ static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
{
struct clk_frac *frac = to_clk_frac(hw);
u32 div;
+ u64 tmp_rate;
div = readl_relaxed(frac->reg) >> frac->shift;
div &= (1 << frac->width) - 1;
- return (parent_rate >> frac->width) * div;
+ tmp_rate = (u64)parent_rate * div;
+ return tmp_rate >> frac->width;
}
static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
@@ -55,7 +56,7 @@ static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
struct clk_frac *frac = to_clk_frac(hw);
unsigned long parent_rate = *prate;
u32 div;
- u64 tmp;
+ u64 tmp, tmp_rate, result;
if (rate > parent_rate)
return -EINVAL;
@@ -68,7 +69,11 @@ static long clk_frac_round_rate(struct clk_hw *hw, unsigned long rate,
if (!div)
return -EINVAL;
- return (parent_rate >> frac->width) * div;
+ tmp_rate = (u64)parent_rate * div;
+ result = tmp_rate >> frac->width;
+ if ((result << frac->width) < tmp_rate)
+ result += 1;
+ return result;
}
static int clk_frac_set_rate(struct clk_hw *hw, unsigned long rate,