[PATCH v2 2/8] clk: renesas: rcar-gen3: Improve arithmetic divisions

[Geert Uytterhoeven]

  - 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+rene...@glider.be>
---
v2:
  - New.
---
 drivers/clk/renesas/rcar-gen3-cpg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c 
b/drivers/clk/renesas/rcar-gen3-cpg.c
index 043ab6ed9d550732..3480284a08308134 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,
-- 
2.17.1