Re: [PATCH 00/04] pinctrl: sh-pfc: r8a7794: DU support

From: Laurent Pinchart
Date: Thu Nov 19 2015 - 21:46:46 EST

Hi Magnus,

Thank you for the patch.

On Tuesday 17 November 2015 12:18:32 Magnus Damm wrote:
> pinctrl: sh-pfc: r8a7794: DU support
> [PATCH 01/04] pinctrl: sh-pfc: r8a7794: Add DU pin groups
> [PATCH 02/04] pinctrl: sh-pfc: r8a7794: Separate DU CDE and DISP
> [PATCH 03/04] pinctrl: sh-pfc: r8a7794: Add missing dot clock signals
> [PATCH 04/04] pinctrl: sh-pfc: r8a7794: Break out ODDF from sync
> These patches take the r8a7794 PFC DU support code from the BSP
> and reworks it to fit the r8a7794 ALT board. Tested with the ALT
> VGA port - by default PFC is not used however enabling PFC using
> an incremental (yet to be posted) patch works well.
> It is worth noting that patch 2-4 modifies the pin groups. This
> means that the upstream DT ABI for PFC DU will differ compared
> to the unreviewed BSP code.
> In general it is not considered good practice to change the pin
> groups and break compatibility since they are part of the DT ABI.
> For this particular case upstream never have had PFC DU support
> for r8a7794, so treating the BSP bindings as experimental and
> migrate away seems reasonable.

If we start considering DT bindings that never went upstream as stable we'll
have a big problem. I mean even bigger than the upstream DT bindings stability
problem :-)

> Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>

Wouldn't it make sense to merge the 4 patches together ?

> ---
> Written against v4.4-rc1
> drivers/pinctrl/sh-pfc/pfc-r8a7794.c | 282 +++++++++++++++++++++++++++----
> 1 file changed, 252 insertions(+), 30 deletions(-)


Laurent Pinchart

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