[PATCH 1/3] phy: phy-can-transceiver: default silent GPIO to high during probe

[Marc Kleine-Budde]

On 30.07.2026 12:33:26, haibo.chen at oss.nxp.com wrote:
> From: Haibo Chen <haibo.chen at nxp.com>
>
> The silent pin of the CAN transceiver is active high, asserting it puts
> the transceiver into silent (listen-only) mode where the transmitter is
> disabled.
>
> At probe time, and before the PHY is powered on, the transceiver should
> default to silent mode. This is the correct and lower-power state: the
> transceiver should not actively drive the CAN bus until the PHY is
> explicitly powered on. Requesting the silent GPIO as GPIOD_OUT_LOW leaves
> the transceiver in normal mode by default, which is both incorrect and
> wastes power.
>
> Request the silent GPIO as GPIOD_OUT_HIGH so the transceiver starts in
> silent mode, and let the power_on/power_off callbacks manage the mode
> afterwards.
>
> Signed-off-by: Haibo Chen <haibo.chen at nxp.com>

Reviewed-by: Marc Kleine-Budde <mkl at pengutronix.de>

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
Vertretung Nürnberg              | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-9   |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-phy/attachments/20260730/d134e955/attachment.sig>