linux-kernel - Re: [PATCH v8 4/7] can: Add Nuvoton NCT6694 CANFD support

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Message-ID: <20250328-gentle-dangerous-raptor-2b66fa-mkl@pengutronix.de>
Date: Fri, 28 Mar 2025 10:11:19 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Ming Yu <a0282524688@...il.com>
Cc: tmyu0@...oton.com, lee@...nel.org, linus.walleij@...aro.org, 
	brgl@...ev.pl, andi.shyti@...nel.org, mailhol.vincent@...adoo.fr, 
	andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, wim@...ux-watchdog.org, linux@...ck-us.net, jdelvare@...e.com, 
	alexandre.belloni@...tlin.com, linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org, 
	linux-i2c@...r.kernel.org, linux-can@...r.kernel.org, netdev@...r.kernel.org, 
	linux-watchdog@...r.kernel.org, linux-hwmon@...r.kernel.org, linux-rtc@...r.kernel.org, 
	linux-usb@...r.kernel.org
Subject: Re: [PATCH v8 4/7] can: Add Nuvoton NCT6694 CANFD support

On 28.03.2025 16:57:46, Ming Yu wrote:
> > > > Does your device support CAN-CC only mode?
> > >
> > > It can dynamically switch between CAN-CC and CAN-FD mode when
> > > trasmitting or receiving, depending on whether the nct6694_can_frame
> > > passs the flag with NCT6694_CAN_FRAME_FLAG_FD.
> >
> > Ok, but what about the receive path? Does the device support CAN-CC only
> > mode? Will it throw an error, if it receives a CAN-FD frame?
> 
> No, it can receive both CAN-CC and CAN-FD frames, if the hardware
> receives a CAN-FD frame, the firmware will set the
> NCT6694_CAN_FRAME_FLAG_FD flag.

Ok, then set the CAN-FD ctrl mode static.

regards,
Marc

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