i2c: rcar: remove open coded DIV_ROUND_CLOSEST

It improves readability if we use the available helper.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 2585092bed52e10263e6ed7fcc1a13c03a0d84d1..5e97635faf785d1e6aa43a14fa9a10667981706b 100644 (file)
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -291,16 +291,15 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv)
        ick = rate / (cdf + 1);
 
        /*
-        * it is impossible to calculate large scale
-        * number on u32. separate it
+        * It is impossible to calculate a large scale number on u32. Separate it.
         *
         * F[(ticf + tr + intd) * ick] with sum = (ticf + tr + intd)
         *  = F[sum * ick / 1000000000]
         *  = F[(ick / 1000000) * sum / 1000]
         */
        sum = t.scl_fall_ns + t.scl_rise_ns + t.scl_int_delay_ns;
-       round = (ick + 500000) / 1000000 * sum;
-       round = (round + 500) / 1000;
+       round = DIV_ROUND_CLOSEST(ick, 1000000);
+       round = DIV_ROUND_CLOSEST(round * sum, 1000);
 
        /*
         * SCL  = ick / (20 + 8 * SCGD + F[(ticf + tr + intd) * ick])