Re: [PATCH v4 3/5] soc: fsl: guts: add the RCW override of any RCWSR

[Vincent Jardin <vjardin@free.fr>]

Hi Vladimir,

> I cannot agree with your API proposal. It exports to the rest of the
> kernel a blanket API for RCW override of any RCWSR1-RCWSR31 register,
> *including* the SerDes fields for which the fsl_guts module already
> exposes an API. So with your proposal, what can be done with
> fsl_guts_lane_set_mode() can also be (un)done with fsl_guts_rcw_override().
> The possibilities of abusing this API design are endless, and I don't
> want to have to deal with them when I can avoid them.
> 
> At a minimum, I would recommend renaming the API as fsl_guts_pmux_override(),
> and make guts enforce which register fields it permits overriding via
> this API. Example:
> 
> static const struct fsl_soc_pmux_mask lx2160a_pmux[] = {
> 	{ 12, GENMASK(29, 0) }, /* IIC2..SDHC1_DIR */
> 	{ 13, GENMASK(29, 0) }, /* SDHC2_DAT74..EVT43 */
> 	{ 14, GENMASK(10, 0) }, /* EVT20..IIC1 */
> 	{ 27, GENMASK(7, 0) },  /* EC1, EC2, USB_EXT, GTX_CLK, SDHC1_DS <- your series is missing these */
> 	{}
> };

good idea, I'll apply it.

Thanks,
  Vincent