[PATCH v2 0/9] gpiolib: more quirks to handle legacy names

[Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>]

In preparation to converting several drivers to gpiod API, and to keep
existing DTS working, this series adds additional quirks to locate
gpio lines with legacy names.

Additionally the quirk handling has been reworked (once again) to pull
all simple renames (ones that do not involve change of indices or other
complex manipulations) into a single quirk with a table containing
transformations. This should make adding new quirks easier.
When using legacy names gpiolib will emit a message to nudge users to
update DTSes (when possible).

Note that the last patch requires the following change from the OF tree:

        88269151be67 ("of: base: make of_device_compatible_match() accept const device node")

The change is also available in mainline - it has been merged in 6.1
merge window.

Thanks.

To: Linus Walleij <linus.walleij@xxxxxxxxxx>
To: Bartosz Golaszewski <brgl@xxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
Cc: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Cc: linux-gpio@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-mediatek@xxxxxxxxxxxxxxxxxxx

---
Changes in v2:
- fixed 'fsl,imx8mq-fec' & 'fsl,imx8qm-fec' compatibles issue noticed
  by Alexander Stein
- implemented Daniel Thompson's suggestion on tightening configs
  selecting renaming quirks and added a comment to discourage adding
  rename quirks without checks for specific compatible(s) 
- added a polarity quirk for Himax LCDs
- collected reviewed-by tags
- Link to v1: https://lore.kernel.org/r/20221011-gpiolib-quirks-v1-0-e01d9d3e7b29@xxxxxxxxx

---
Dmitry Torokhov (9):
      gpiolib: of: add a quirk for legacy names in Mediatek mt2701-cs42448
      gpiolib: of: consolidate simple renames into a single quirk
      gpiolib: of: tighten selection of gpio renaming quirks
      gpiolib: of: add quirk for locating reset lines with legacy bindings
      gpiolib: of: add a quirk for reset line for Marvell NFC controller
      gpiolib: of: add a quirk for reset line for Cirrus CS42L56 codec
      gpiolib: of: factor out code overriding gpio line polarity
      gpiolib: of: add quirk for phy reset polarity for Freescale Ethernet
      gpiolib: of: add a quirk for reset line polarity for Himax LCDs

 drivers/gpio/gpiolib-of.c | 344 ++++++++++++++++++++++++++++++----------------
 1 file changed, 222 insertions(+), 122 deletions(-)
---
base-commit: cd9fd78f5c11b5e165d9317ef11e613f4aef4dd1
change-id: 20221011-gpiolib-quirks-d452ed31d24e

Best regards,
Dmitry