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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
| commit | b4b7ff4b08e691656c9d77c758fc355833128ac0 (patch) | |
| tree | 82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /drivers/clk/mxs/clk-frac.c | |
| parent | 35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff) | |
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'drivers/clk/mxs/clk-frac.c')
| -rw-r--r-- | drivers/clk/mxs/clk-frac.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/clk/mxs/clk-frac.c b/drivers/clk/mxs/clk-frac.c index 73f024056..f8dd10f6d 100644 --- a/drivers/clk/mxs/clk-frac.c +++ b/drivers/clk/mxs/clk-frac.c @@ -41,11 +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, @@ -54,7 +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; @@ -67,7 +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, |