On Wed, Jan 25, 2023 at 04:42:58PM +0100, Sascha Hauer wrote: > The barebox PFUZE PMIC driver is not a real regulator driver it's just a > no-op driver providing a regmap, so by definition it is not guilty. > > My wild guess is that regulator-audio-codec needs to be enabled to let > the EEPROM work. The Audio codec sits on the same I2C bus as the EEPROM > and it could be that the codec just pulls the I2C data line low when > it's not powered up. Hi Sascha, I was ignoring my email and troubleshooting further and figured out that the PMIC driver was a no-op and that for some reason I did need the audio regulator enabled, but I wasn't sure why. This makes total sense though. > > You could verify this by doing a > > gpio_direction_output 156 0 > > on the command line and then try to read from the EEPROM. It sould fail > and start working again after a > > gpio_direction_output 156 1 I confirm this was the issue with GPIO 145. > > Sascha Thanks so much. I'll submit V2 of the Novena patches soon. John.
