linux-kernel - Re: [PATCH v2] dt-bindings: phy: ti,tcan104x-can: Document TI TCAN1046

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Message-ID: <20251210-persuaded-rewire-8ac93b0cc039@spud>
Date: Wed, 10 Dec 2025 18:21:34 +0000
From: Conor Dooley <conor@...nel.org>
To: Marc Kleine-Budde <mkl@...gutronix.de>
Cc: Prabhakar <prabhakar.csengg@...il.com>,
	Vincent Mailhol <mailhol@...nel.org>, Vinod Koul <vkoul@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Aswath Govindraju <a-govindraju@...com>,
	Frank Li <Frank.li@....com>, linux-can@...r.kernel.org,
	linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2] dt-bindings: phy: ti,tcan104x-can: Document TI
 TCAN1046

On Wed, Dec 10, 2025 at 08:52:58AM +0100, Marc Kleine-Budde wrote:
> On 09.12.2025 16:21:19, Prabhakar wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > Document the TI TCAN1046 automotive CAN transceiver. The TCAN1046 is a
> > dual high-speed CAN transceiver with sleep-mode support and no EN pin,
> > mirroring the behaviour of the NXP TJA1048, which also provides dual
> > channels and STB1/2 sleep-control lines.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> > TCAN 1046, https://www.ti.com/lit/ds/symlink/tcan1046v-q1.pdf?ts=1765297159307&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTCAN1046V-Q1
> > NXP TJA1048, https://www.nxp.com/docs/en/data-sheet/TJA1048.pdf
> 
> The polarity of the standby line of the chips is different.
> 
> You must set the correct active high/low property for the GPIO, as the
> driver uses logical levels.
> 
> Reviewed-by: Marc Kleine-Budde <mkl@...gutronix.de>

What you're saying seems to contradict the tag you've given, is a
fallback really suitable if the standby polarity is not the same?

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