Re: [PATCH net-next v8 3/4] net: pse-pd: realtek-pse-mcu: add I2C transport

[Kory Maincent]

On Wed, 15 Jul 2026 07:55:27 +0000
Jonas Jelonek <jelonek.jonas@xxxxxxxxx> wrote:

> Add the I2C/SMBus transport for the Realtek PSE MCU core. It registers
> the MCU on an I2C bus and provides the send/recv callbacks the core
> uses to exchange the 12-byte frames.
> 
> The MCU firmware expects one of two framings on the I2C bus, and which one
> is part of the compatible: '-smbus' (reads carry a leading command byte
> and a repeated start) or raw '-i2c' (bare block writes and reads). The
> match data flags the raw-I2C case; SMBus is the default because that's
> what the majority of devices uses.
> 
> Because i2c_master_send()/i2c_master_recv() may DMA, the raw-I2C path
> bounces each frame through a heap buffer rather than the core's stack
> buffers; the SMBus path is unaffected.
> 
> Signed-off-by: Jonas Jelonek <jelonek.jonas@xxxxxxxxx>
> Acked-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>

Reviewed-by: Kory Maincent <kory.maincent@xxxxxxxxxxx>

Thank you!
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com