Quoting Akash Asthana (2019-11-15 02:00:44) > > On 11/14/2019 11:10 PM, Stephen Boyd wrote: > > Quoting Akash Asthana (2019-11-13 02:48:56) > >> Add system wakeup capability over UART RX line for wakeup capable UART. > >> When system is suspended, RX line act as an interrupt to wakeup system > >> for any communication requests from peer. > > How does the RX line get remuxed as a GPIO interrupt here? Is that > > through some pinctrl magic in DT or just via enabling/disabling the > > interrupt? > Yes, For wakeup capable UART node, we have registered UART RX line with > TLMM interrupt controller in DT file . Example: if GPIO48 is UART RX line > > interrupts-extended = <&intc GIC_SPI 607 IRQ_TYPE_LEVEL_HIGH>, <&tlmm > 48 IRQ_TYPE_EDGE_FALLING>; Right. So is gpio48 muxed as 'uart' function forever and the interrupt logic in tlmm is connected to that pad regardless of the function selected? I thought that gpios through TLMM had to be muxed as function 0, i.e. gpio function, so that interrupts worked. But maybe that's wrong and it can work without that.
