diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-08-30 16:45:09 +0300 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-10-01 11:24:46 +0300 |
| commit | b5dea62d34042d173ba1d1887c8dd40262423d68 (patch) | |
| tree | c620513858ddd2bbeb400a032f789762274ebc82 /drivers/clk/renesas | |
| parent | 3e8c1d4cce6b679f4cfd81dfdbbf727f06986aa5 (diff) | |
| download | linux-b5dea62d34042d173ba1d1887c8dd40262423d68.tar.xz | |
clk: renesas: rcar-gen3: Improve arithmetic divisions
- Use div64_ul() instead of div_u64() if the divisor is unsigned long,
to avoid truncation to 32-bit on 64-bit platforms,
- Use div_u64() for 64-by-32 divisions.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20190830134515.11925-3-geert+renesas@glider.be
Diffstat (limited to 'drivers/clk/renesas')
| -rw-r--r-- | drivers/clk/renesas/rcar-gen3-cpg.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c index d25c8ba00a65..c594bc067c3b 100644 --- a/drivers/clk/renesas/rcar-gen3-cpg.c +++ b/drivers/clk/renesas/rcar-gen3-cpg.c @@ -122,10 +122,10 @@ static long cpg_z_clk_round_rate(struct clk_hw *hw, unsigned long rate, unsigned int mult; prate = *parent_rate / zclk->fixed_div; - mult = div_u64(rate * 32ULL, prate); + mult = div64_ul(rate * 32ULL, prate); mult = clamp(mult, 1U, 32U); - return (u64)prate * mult / 32; + return div_u64((u64)prate * mult, 32); } static int cpg_z_clk_set_rate(struct clk_hw *hw, unsigned long rate, |