Re: [PATCH] arm64: dts: ti: k3-am64-main: Add PRU system events for virtio

[Ravi Gunasekaran <r-gunasekaran@ti.com>]

On 4/23/2024 3:36 PM, MD Danish Anwar wrote:
> From: Suman Anna <s-anna@ti.com>
>
> PRU system events "vring" have been added to each PRU and RTU node
> in each of the ICSSG0 and ICSSG1 remote processor subsystems to
> enable the virtio/rpmsg communication between MPU and that PRU/RTU core.
> No events have been added to the Tx_PRU cores at present. The
> additions are done in the base k3-am64main.dtsi, and so are inherited
> by all the K3 AM64x boards.
>
> The PRU system events is the preferred approach over using TI
> mailboxes, as it eliminates an external peripheral access from
> the PRU/RTU-side, and keeps the interrupt generation internal to
> the ICSSG. The difference from MPU would be minimal in using one
> versus the other.
>
> Mailboxes can still be used if desired, but currently there is
> no support on firmware-side for K3 SoCs to use mailboxes. Either
> approach would require that an appropriate firmware image is
> loaded/booted on the PRU.
>
> Signed-off-by: Suman Anna <s-anna@ti.com>
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
> ---
> This patch is based on linux-next tag next-20240423
>  
>  arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>
>

Acked-by: Ravi Gunasekaran <r-gunasekaran@ti.com>

Regards,
Ravi