[PATCH v3] phy: cadence-torrent: add support for three or more links using 2 protocols

[Roger Quadros]

On 16/07/2024 13:24, Siddharth Vadapalli wrote:
> The Torrent SERDES can support at most two different protocols (PHY types).
> This only mandates that the device-tree sub-nodes used to represent the
> configuration should describe links with at-most two different protocols.
> 
> The existing implementation however imposes an artificial constraint that
> allows only two links (device-tree sub-nodes). As long as at-most two
> protocols are chosen, using more than two links to describe them in an
> alternating configuration is still a valid configuration of the Torrent
> SERDES.
> 
> A 3-Link 2-Protocol configuration of the 4-Lane SERDES can be:
> Lane 0 => Protocol 1 => Link 1
> Lane 1 => Protocol 1 => Link 1
> Lane 2 => Protocol 2 => Link 2
> Lane 3 => Protocol 1 => Link 3
> 
> A 4-Link 2-Protocol configuration of the 4-Lane SERDES can be:
> Lane 0 => Protocol 1 => Link 1
> Lane 1 => Protocol 2 => Link 2
> Lane 2 => Protocol 1 => Link 3
> Lane 3 => Protocol 2 => Link 4
> 
> Signed-off-by: Siddharth Vadapalli <s-vadapalli at ti.com>

Reviewed-by: Roger Quadros <rogerq at kernel.org>