# Re: \[PATCH AUTOSEL 5.11 05/67\] can: flexcan: add CAN wakeup function for i.MX8QM

- From: Fabio Estevam \<festevam@gmail.com\>
- Date: 2021-02-25 02:49:59 
- List: stable
- Page: https://ratatoskr.run/stable/2021/02/6278433
- Thread: https://ratatoskr.run/stable/2021/02/6277678/t.md

```text
Hi Sasha,

On Wed, Feb 24, 2021 at 10:35 PM Sasha Levin [ref] wrote:
>
> From: Joakim Zhang <redacted>
>
> [ Upstream commit 812f0116c66a3ebaf0b6062226aa85574dd79f67 ]
>
> The System Controller Firmware (SCFW) is a low-level system function
> which runs on a dedicated Cortex-M core to provide power, clock, and
> resource management. It exists on some i.MX8 processors. e.g. i.MX8QM
> (QM, QP), and i.MX8QX (QXP, DX). SCU driver manages the IPC interface
> between host CPU and the SCU firmware running on M4.
>
> For i.MX8QM, stop mode request is controlled by System Controller Unit(SCU)
> firmware, this patch introduces FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW quirk
> for this function.
>
> Signed-off-by: Joakim Zhang <redacted>
> Link: https://lore.kernel.org/r/20201106105627.31061-6-qiangqing.zhang@nxp.com
> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
> Signed-off-by: Sasha Levin <sashal@kernel.org>

This is adding a new feature and not fixing a bug.

Why does it qualify for stable inclusion?
```