netdev - Re: [PATCH linux-can-next/flexcan 3/4] can: flexcan: add CAN wakeup function for i.MX8

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Message-ID: <f26c1dc3-f5f7-9a5a-ae2f-07cc2da6803e@pengutronix.de>
Date:   Fri, 25 Sep 2020 11:44:29 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Joakim Zhang <qiangqing.zhang@....com>, linux-can@...r.kernel.org
Cc:     linux-imx@....com, netdev@...r.kernel.org
Subject: Re: [PATCH linux-can-next/flexcan 3/4] can: flexcan: add CAN wakeup
 function for i.MX8

On 9/25/20 5:10 PM, Joakim Zhang wrote:
> 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.MX8, stop mode request is controlled by System Controller Unit(SCU)
> firmware.
> 
> Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
> ---

Just for reference, this fails to build with:

ERROR: modpost: "imx_scu_get_handle" [drivers/net/can/flexcan.ko] undefined!
ERROR: modpost: "imx_sc_misc_set_control" [drivers/net/can/flexcan.ko] undefined!

Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
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