[00/21] pinctrl: ralink: fix ABI, improve driver, move to mediatek, improve dt-bindings

This is an ambitious effort I've been wanting to do for months.

Straight off the bat, I'm fixing the ABI that I broke a while back, by
reintroducing the ralink,rt2880-pinmux compatible string.

If you take a look at the schema for mt7620 and rt305x, some functions got
multiple lists for groups. Like refclk on mt7620. Because mt7620 and
mt7628/mt7688 SoCs use the same compatible string, it's impossible to
differentiate on the binding which SoC a devicetree is actually for.
Therefore, the binding will allow all groups listed for that function. For
example, if the SoC is mt7620, only the refclk function for the mdio group
can be used. If one were to put "spi cs1" as the function there, there
wouldn't be a warning.

I address this by introducing new compatible strings for these SoCs, then
split the schemas. I also separate mt7628/mt7688 from mt7620 pinctrl
subdriver in the process.

I wanted to split the rt305x driver too but too much code would be reused
so I backed down from that.

This platform from Ralink was acquired by MediaTek in 2011. Then, MediaTek
introduced new SoCs which utilise this platform. We're moving the Ralink
pinctrl driver to MediaTek, and rename the schemas for MediaTek SoCs to
mediatek.

I've renamed the ralink core driver to mtmips. I decided to call the core
mtmips as I've seen folks from MediaTek use the same name when they added
support for MT7621 pinctrl on U-Boot. Feel free to comment on this.

Arınç

v2:
- Address Rob and Krzysztof's reviews, add Rob's acked-by.
- More more cleanups, hooray!
- Don't add new mediatek compatible strings, we don't do that here. RIP
Chadwick Boseman.
- Don't deprecate ralink,mt7620-pinctrl, we need it now.
- More slight changes I can't currently remember to mention.

RFC to v1:
- Address Rob and Krzysztof's reviews, add Rob's acked-by.
- More cleanups, hooray!
- Keep ralink,rt2880-pinmux deprecated.
- Deprecate ralink,mt7620-pinctrl. Another one bites the dust!
- More slight changes I can't currently remember to mention.

Arınç ÜNAL (21):
  pinctrl: ralink: reintroduce ralink,rt2880-pinmux compatible string
  pinctrl: ralink: rt305x: add new compatible string for every SoC
  pinctrl: ralink: mt7620: split out to mt76x8
  pinctrl: ralink: move to mediatek as mtmips
  pinctrl: mediatek: remove OF_GPIO as reverse dependency
  dt-bindings: pinctrl: ralink: move additionalProperties to top
  dt-bindings: pinctrl: ralink: drop quotes from referred schemas
  dt-bindings: pinctrl: ralink: add new compatible strings
  dt-bindings: pinctrl: ralink: {mt7620,mt7621}: rename to mediatek
  dt-bindings: pinctrl: mediatek: mt6795: rename to mediatek,mt6795-pinctrl
  dt-bindings: pinctrl: mediatek: mt8186: rename to mediatek,mt8186-pinctrl
  dt-bindings: pinctrl: mediatek: mt8192: rename to mediatek,mt8192-pinctrl
  dt-bindings: pinctrl: mediatek: mt8195: rename to mediatek,mt8195-pinctrl
  dt-bindings: pinctrl: mediatek: fix naming inconsistency
  dt-bindings: pinctrl: {mediatek,ralink}: fix formatting
  dt-bindings: pinctrl: mediatek: fix pinmux header location
  dt-bindings: pinctrl: mediatek: drop quotes from referred schemas
  dt-bindings: pinctrl: mediatek: mt7986: fix patternProperties regex
  dt-bindings: pinctrl: ralink: rt305x: split binding
  dt-bindings: pinctrl: mediatek: mt7620: split binding
  MAINTAINERS: move ralink pinctrl to mediatek mips pinctrl

 .../pinctrl/mediatek,mt65xx-pinctrl.yaml        |  32 +-
 .../pinctrl/mediatek,mt6779-pinctrl.yaml        |  39 +-
 ...mt6795.yaml => mediatek,mt6795-pinctrl.yaml} |  43 +-
 .../pinctrl/mediatek,mt7620-pinctrl.yaml        | 298 ++++++++++++++
 ...inctrl.yaml => mediatek,mt7621-pinctrl.yaml} |  17 +-
 .../pinctrl/mediatek,mt7622-pinctrl.yaml        |  34 +-
 ...inctrl.yaml => mediatek,mt76x8-pinctrl.yaml} | 252 ++----------
 .../pinctrl/mediatek,mt7981-pinctrl.yaml        |  35 +-
 .../pinctrl/mediatek,mt7986-pinctrl.yaml        |  80 ++--
 .../pinctrl/mediatek,mt8183-pinctrl.yaml        |  32 +-
 ...mt8186.yaml => mediatek,mt8186-pinctrl.yaml} |  55 ++-
 .../pinctrl/mediatek,mt8188-pinctrl.yaml        |  80 ++--
 ...mt8192.yaml => mediatek,mt8192-pinctrl.yaml} |  57 +--
 ...mt8195.yaml => mediatek,mt8195-pinctrl.yaml} |  51 ++-
 .../pinctrl/mediatek,mt8365-pinctrl.yaml        |  30 +-
 .../bindings/pinctrl/ralink,rt2880-pinctrl.yaml |  11 +-
 .../bindings/pinctrl/ralink,rt305x-pinctrl.yaml |  89 +----
 .../bindings/pinctrl/ralink,rt3352-pinctrl.yaml | 243 ++++++++++++
 .../bindings/pinctrl/ralink,rt3883-pinctrl.yaml |  11 +-
 .../bindings/pinctrl/ralink,rt5350-pinctrl.yaml | 206 ++++++++++
 MAINTAINERS                                     |  29 +-
 drivers/pinctrl/Kconfig                         |   1 -
 drivers/pinctrl/Makefile                        |   1 -
 drivers/pinctrl/mediatek/Kconfig                |  54 ++-
 drivers/pinctrl/mediatek/Makefile               |  63 +--
 drivers/pinctrl/mediatek/pinctrl-mt7620.c       | 137 +++++++
 .../{ralink => mediatek}/pinctrl-mt7621.c       |  31 +-
 drivers/pinctrl/mediatek/pinctrl-mt76x8.c       | 283 ++++++++++++++
 .../pinctrl-mtmips.c}                           |  90 ++---
 .../pinctrl-mtmips.h}                           |  16 +-
 .../{ralink => mediatek}/pinctrl-rt2880.c       |  21 +-
 .../{ralink => mediatek}/pinctrl-rt305x.c       |  47 +--
 .../{ralink => mediatek}/pinctrl-rt3883.c       |  29 +-
 drivers/pinctrl/ralink/Kconfig                  |  35 --
 drivers/pinctrl/ralink/Makefile                 |   8 -
 drivers/pinctrl/ralink/pinctrl-mt7620.c         | 391 -------------------
 36 files changed, 1738 insertions(+), 1193 deletions(-)