Fix I2C GPIO interrupts with ATX-PSU POWER_GOOD input #81
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If the ATX-PSU POWER_GOOD input is connected to an PCA9554 I2C GPIO expander which is also connected to a shared I2C bus interrupt pin, then changes in the ATX-PSU POWER_GOOD state will block the I2C bus interrupts until the GPIO inputs are read.
Add support for multiple
gpio_i2c_devsharing the sameint_pin.Move I2C GPIO timeout to the
gpio_i2c_dev.Change
atx_psuto use interrupts and polling for thepower_goodinput state.TODO
gpio_i2c_dev