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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: d982d66514 ("i2c: riic: remove clock and frequency restrictions")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Claudiu Beznea 2025-09-23 17:18:26 +03:00 committed by Wolfram Sang
parent 2f6aa0acdc
commit dde9a38195
1 changed files with 1 additions and 1 deletions
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2
drivers/i2c/busses/i2c-riic.c
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@ -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.