Max, On Sun, Oct 12, 2014 at 5:10 AM, Max Schwarz <[email protected]> wrote: >> + /* Adjust to avoid overflow */ >> + i2c_rate_khz = DIV_ROUND_UP(i2c_rate, 1000); >> + scl_rate_khz = DIV_ROUND_UP(scl_rate, 1000); > > I'm not really comfortable with using DIV_ROUND_UP on the last line, since > this may violate the user's set SCL rate. Rounding up 1.1kHz SCL rate to 2kHz > is not good.
Ah, good point. So we round up for i2c_rate and down for scl_rate: i2c_rate_khz = DIV_ROUND_UP(i2c_rate, 1000); scl_rate_khz = scl_rate / 1000; > I suggest using scl_rate / 1000 and placing a > > if(WARN_ON(scl_rate < 1000)) > scl_rate = 1000; > > somewhere to prevent scl_rate_khz from becoming 0. Ah, makes sense. Yeah, that should be at the top. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
