[PATCH v4 0/5] Pinctrl: Add Amlogic pinctrl driver

[Xianwei Zhao via B4 Relay <devnull+xianwei.zhao.amlogic.com@kernel.org>]

Add pinctrl driver support for Amloigc SoCs

Base on the previous discussion,
https://lore.kernel.org/r/20241113-a4_pinctrl-v6-0-35ba2401ee35@amlogic.com
The existed meson driver failed to meet the requirement of the current dt-binding.
So we start this new pinctrl driver to solve problem.

The advantage of this version: Once the source file and binding document
are added, adding dts node will be only operation for subsequent Amlogic SoCs
(such as A4, A5).

The code in DTS file is also readable when using GPIO, as below:
reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>;

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
Changes in v4:
- Drop bank-number property, and get information from gpio-ranges property.
- Keep required of pinctrol after patternProperties, and add missing "ranges" for required.
- Add required(pinmux) of function.
- Keep address-cells and size-cells property values, because:
  Previously only represented a register address offset value, now directly represents a register, through 'ranges" which to represent.
- Some little modifications were made to bindings and dts according to Krzysztof's suggestions.
- Link to v3: https://lore.kernel.org/r/20250115-amlogic-pinctrl-v3-0-2b8536457aba@amlogic.com

Changes in v3:
- Move reg and reg-name from pin controller node into gpio-controller node and drop mask property.
- Use gpio-range instead of ngpios property.
- Some little modifications were made to bindings according to Rob's suggestions.
- Fix bug reported by kernel test robot.
- Two pin controller node compressed into one because of register address defined in gpio-controller.
- Link to v2: https://lore.kernel.org/r/20241226-amlogic-pinctrl-v2-0-cdae42a67b76@amlogic.com

Changes in v2:
- Some modifications and optimizations were made to bindings according to Rob's suggestions.
- Refined some details on functions node for bindings. 
- Some source code optimizations were made according to Linus's suggestions.
- Add stand API to generic to deal pinmux propertity.
- Add private reg data to deal with for future SoCs.
- Simplified some unused processing (previously used for extension).
- Sync add to MAINTAINERS files.
- Link to v1: https://lore.kernel.org/r/20241211-amlogic-pinctrl-v1-0-410727335119@amlogic.com

---
Xianwei Zhao (5):
      dt-bindings: pinctrl: Add support for Amlogic SoCs
      pinctrl: pinconf-generic: Add API for pinmux propertity in DTS file
      pinctrl: Add driver support for Amlogic SoCs
      arm64: dts: amlogic: a4: add pinctrl node
      MAINTAINERS: Add an entry for Amlogic pinctrl driver

 .../bindings/pinctrl/amlogic,pinctrl-a4.yaml       |  127 +++
 MAINTAINERS                                        |    8 +
 arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi        |  120 +++
 drivers/pinctrl/Kconfig                            |   18 +
 drivers/pinctrl/Makefile                           |    1 +
 drivers/pinctrl/pinconf-generic.c                  |  130 +++
 drivers/pinctrl/pinconf.h                          |    4 +
 drivers/pinctrl/pinctrl-amlogic.c                  | 1053 ++++++++++++++++++++
 include/dt-bindings/pinctrl/amlogic,pinctrl.h      |   46 +
 include/linux/pinctrl/pinconf-generic.h            |    4 +
 10 files changed, 1511 insertions(+)
---
base-commit: 4de5110762b94b9978fb8182a568572fb2194f8b
change-id: 20241211-amlogic-pinctrl-22ea61820d0d

Best regards,
-- 
Xianwei Zhao <xianwei.zhao@amlogic.com>



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