On 1/7/21 10:00 PM, Fabio Estevam wrote: > On Thu, Jan 7, 2021 at 2:38 PM Fabio Estevam <festevam@xxxxxxxxx> wrote: >> >> Hi, >> >> The imx6ul-evk uses a MC34901 CAN transceiver and the STB pin >> (standby_ needs to be controlled (1 = standby, 0 = normal mode) >> >> As far as I can see, there is no support for the STB pin currently in >> he can framework. >> >> What would be the correct way to describe it in the devicetree? >> >> Would it be acceptable to use something like this? >> https://pastebin.com/raw/SsY6USdT > > I made a simpler approach and submitted patches for review. There is at least one board (IIRC the mx28evk) which has a dual transceiver with one standby pin for both channels. This is why we modeled the standby, enable or listen-only pin as a regulator. It's already supported by the flexcan driver. See xceiver-supply in the imx dst, e.g.: https://elixir.bootlin.com/linux/v5.10/source/arch/arm/boot/dts/imx6qdl-tx6.dtsi#L240 Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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