Re: [PATCH net-next v9 06/15] ax88179_178a: Add HW support for AX179A-based chips

[Andrew Lunn <andrew@lunn.ch>]

On Wed, Sep 02, 2026 at 06:57:20PM +0200, Birger Koblitz wrote:
> This adds bindings and HW support for AX179A-based USB-Ethernet
> controllers. The AX179A-family of chips consists of the
> AX88279 (2.5GBit PHY)
> AX88179A/B (1GBit PHY, B variant has wider temperature range)
> AX772D/E (100Mbit PHY)
> 
> The controllers all have the same vendor and device ID
> (0x0b95, 0x1790) and are distinguished by their BCD device versions,
> which are
> 2.00 AX88179A/B
> 3.00 AX88772D/E
> 4.00 AX88279
> 
> For all chips, the driver calls the same ax88179a_bind() function
> and the chips are then distinguished by the chip version and
> BCD device ID. The AX179A-based chips all provide both a CDC-NCM
> compatible USB interface, and a proprietary vendor interface. By default,
> the proprietary vendor interface is not active and Linux will load the
> CDC-NCM driver to support the devices. If the ax88179_178a module is
> configured by the OS to have precedence over CDC-NCM, then this driver
> will switch the device to use the vendor interface, and the device will
> be controlled by the ax88179_178a driver when the device is probed again
> after an automatic reset by the device.
> 
> Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew