Re: [PATCH v3] i2c: rk3x: Account for repeated start time requirement

2015-01-13 Thread Wolfram Sang
On Thu, Dec 18, 2014 at 09:44:07AM -0800, Doug Anderson wrote: > On Rockchip I2C the controller drops SDA low slightly too soon to meet > the "repeated start" requirements. > > From my own experimentation over a number of rates: > - controller appears to drop SDA at .875x (7/8) programmed clk hig

[PATCH v3] i2c: rk3x: Account for repeated start time requirement

2014-12-18 Thread Doug Anderson
On Rockchip I2C the controller drops SDA low slightly too soon to meet the "repeated start" requirements. >From my own experimentation over a number of rates: - controller appears to drop SDA at .875x (7/8) programmed clk high. - controller appears to keep SCL high for 2x programmed clk high. T