Hi Wolfram? ? 2016/4/16 1:58, Wolfram Sang ??: >> The default frequency rate of function clock is 50M Hz, it can match >> F/S mode, but HS mode not. If use default rate 50M to get 1.7M >> scl-frequency rate , we could not get accurately 1.7M frequecy rate. >> The input-clk-rate is more higher, we get more accurately >> scl-frequency rate, as 200M is a suitable input-clk-rate. >> >> If 200M was used for F/S mode, it would increase power consumption, so >> add a option that could be configured from DT. > If I understand you correctly, couldn't you use clk_set_rate() depending > on the desired scl frequency which is already described in DT as > clock-frequency? Yeap, the default input clock rate is too low for HS mode, and it 's flexible that we get it from DT.
