* Judith Mendez <jm@xxxxxx> [230530 22:48]: > Introduce timer polling method to MCAN since some SoCs may not > have M_CAN interrupt routed to A53 Linux and do not have > interrupt property in device tree M_CAN node. > > On AM62x SoC, MCANs on MCU domain do not have hardware interrupt > routed to A53 Linux, instead they will use timer polling method. > > Add an hrtimer to MCAN class device. Each MCAN will have its own > hrtimer instantiated if there is no hardware interrupt found in > device tree M_CAN node. The timer will generate a software > interrupt every 1 ms. In hrtimer callback, we check if there is > a transaction pending by reading a register, then process by > calling the isr if there is. Reviewed-by: Tony Lindgren <tony@xxxxxxxxxxx>
