diff options
Diffstat (limited to 'chip/npcx/i2c.c')
| -rw-r--r-- | chip/npcx/i2c.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/chip/npcx/i2c.c b/chip/npcx/i2c.c index 151f786fbf..f98697da7b 100644 --- a/chip/npcx/i2c.c +++ b/chip/npcx/i2c.c @@ -758,9 +758,9 @@ static void i2c_freq_changed(void) * Set SCL frequency by formula: * tSCL = 4 * SCLFRQ * tCLK * fSCL = fCLK / (4*SCLFRQ) - * SCLFRQ = fSCL/(4*fSCL) + * SCLFRQ = ceil(fCLK/(4*fSCL)) */ - scl_freq = (freq/1000) / (bus_freq*4); /* bus_freq is KHz */ + scl_freq = DIV_ROUND_UP(freq, bus_freq*4000); /* Unit in bps */ /* Normal mode if i2c freq is under 100kHz */ if (bus_freq <= 100) { |