Re: [PATCH v8 2/2] can: m_can: Add hrtimer to generate software interrupt

[Hiago Franco]

On Wed, May 31, 2023 at 12:51 AM Judith Mendez <jm@xxxxxx> wrote:
>
> 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.
>
> Signed-off-by: Judith Mendez <jm@xxxxxx>

Tested-by: Hiago De Franco <hiago.franco@xxxxxxxxxxx> # Toradex Verdin AM62