[PATCH 0/2] pinctrl: sh-pfc: r8a77965: Add VIN4 and VIN5

[Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>]

Hello,
   this two patches add supports for VIN4 and VIN5 interfaces to R-Car M3-N.

On this SoC (and in the forthcoming support for E3 R8A77990) the VIN groups
could appear on different sets of pins, usually the 'a' and 'b' one.

With the existing VIN_DATA_PIN_GROUP macro we have to specify group names as:

VIN_DATA_PIN_GROUP(vin4_data_a, 8)

which results in the group being named as "vin4_data_a_8" which is
un-consistent with the canonical group names (eg. "vin4_data8_a").

This series adds a macro that allows to specify the group 'version' along with
the pin and mux numbers in patch [1/1]. I haven't been able to find a better
term than 'version' as 'group' was already taken. Suggestions welcome.

As I cannot test VIN4 nor VIN5 on Salvator-XS as the parallel pins are not
wired, I made sure the macro creates correct names and fields not only by
compile testing it, but with a small C program [1] that replicates the VIN data
layout defined in the PFC module and access fields (and has helped me testing
more easily the preprocessor stringification/concatenation process).

Final note: Simon, you took the E3 patches in your tree, and I expect them to
land on v4.20-rc1. They use the old macros, are follow up patches ok?)

Thanks
   j

[1] https://paste.debian.net/1049603/

Jacopo Mondi (2):
  pinctrl: sh-pfc: Introduce VIN_DATA_PIN_GROUP_VER
  pinctrl: sh-pfc: r8a77965: Add VIN[4|5] groups/functions

 drivers/pinctrl/sh-pfc/pfc-r8a77965.c | 254 ++++++++++++++++++++++++++++++++++
 drivers/pinctrl/sh-pfc/sh_pfc.h       |  20 ++-
 2 files changed, 269 insertions(+), 5 deletions(-)

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