I have some questions that span multiple subsystems including gpio/pinctrl, apm, and net subsystems.
On some of our system on module designs, we use a GPIO to toggle the enable pin on external oscillators. In particular, we are using a 50Mhz oscillator to drive a clock on a RMII Ethernet PHY. Though I can configure the pin such that the Ethernet interface works we are looking to disable the oscillator during APM sleep but after the PHY is put into a low power mode. How do I register a GPIO for use in the PHY suspend and resume code? Can it be handled outside of the PHY driver? If so how do ensure the appropriate suspend and resume sequencing? For reference, we are using a Micrel KSZ8081 PHY connected to a AT91SAMA5D35 processor. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
