On Feb 11, 2022, at 8:32 AM, Shawn McCarney <shawnmm@linux.ibm.com> wrote:On 2/9/2022 4:30 PM, Mike Jones wrote:
The journal shows an I2C error: Device or resource busy.
Does hwmon lock out phosphor-regulators if it uses the same address?
phosphor-regulators currently communicates directly with voltage regulators using i2c-dev; it does not use device drivers.
The reason is that most regulator drivers provide either no or very limited ability to configure regulators. For the systems I work on, we need to do extensive regulator configuration to fine tune things (output voltage, pgood min/max, timing, etc.) Redundant phase fault detection is also pretty device-specific and on involves communicating with multiple devices.
I have not tested using phosphor-regulators when a driver is bound to the regulator, but I suspect you may be right. I assume hwmon is using read sensor data from a driver, and the driver being bound is stopping the phosphor-regulators read from succeeding.
Thanks,Shawn