[PATCH v4 phy-next 8/9] soc: fsl: guts: implement the RCW override procedure

[Ioana Ciornei]

On Wed, Jul 22, 2026 at 02:16:02AM +0300, Vladimir Oltean wrote:
> Add support for the RCW override procedure which enables runtime
> reconfiguration of the protocol running on a SerDes lane. The procedure
> is done through the DCFG DCSR space which now can be defined as the
> second memory region of the guts DT node.
> Support is added on the following SoCs: LS1046A, LS1088A, LS2088A.
> 
> The procedure is exported to the "client" driver - the Lynx10G SerDes
> PHY driver - through the following functions:
> - fsl_guts_lane_validate() used to validate that changing the protocol
>   on a specific lane is supported.
> - fsl_guts_lane_set_mode() which can be used to request the RCW
>   procedure be executed for a specific lane.
> 
> Since the RCW override procedure is different depending on the SoC, the
> private fsl_soc_data structure is updated with two new per SoC callbacks
> (.serdes_get_rcw_override() and .serdes_init_rcwcr()) which get used
> from the generic fsl_guts_lane_set_mode() function. These two callbacks
> hide all the SoC specific register offsets, masks and values so that the
> _set_mode() procedure is straightforward.
> 
> Signed-off-by: Ioana Ciornei <ioana.ciornei at nxp.com>
> Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>

Reviewed-by: Ioana Ciornei <ioana.ciornei at nxp.com>