Commit dde9a381 authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Wolfram Sang
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i2c: riic: Allow setting frequencies lower than 50KHz 



The MR1.CKS field is 3 bits wide and all the possible values (from 0 to
7) are valid. This is true for all the SoCs currently integrated in
upstream Linux. Take into account CKS=7 which allows setting bus
frequencies lower than 50KHz. This may be useful at least for debugging.

Fixes: d982d665 ("i2c: riic: remove clock and frequency restrictions")
Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
parent 2f6aa0ac

drivers/i2c/busses/i2c-riic.c

+1 −1
Original line number Diff line number Diff line
@@ -386,7 +386,7 @@ static int riic_init_hw(struct riic_dev *riic) 
	 */

	total_ticks = DIV_ROUND_UP(rate, t->bus_freq_hz ?: 1);



	for (cks = 0; cks < 7; cks++) {

	for (cks = 0; cks <= 7; cks++) {

		/*

		 * 60% low time must be less than BRL + 2 + 1

		 * BRL max register value is 0x1F.