Commit 3c417c94 authored by Wolfram Sang's avatar Wolfram Sang Committed by Wolfram Sang
Browse files

i2c: rcar: remove open coded DIV_ROUND_CLOSEST 



It improves readability if we use the available helper.

Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
parent 47280af8

drivers/i2c/busses/i2c-rcar.c

+3 −4
Original line number Diff line number Diff line
@@ -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])