[PATCH v5 0/2] i2c: Add driver support Amlogic A9 I2C

[Xianwei Zhao via B4 Relay]

Add a Device Tree binding and driver for the I2C controller found on the
Amlogic A9 SoC.

Signed-off-by: Xianwei Zhao <xianwei.zhao at amlogic.com>
---
Changes in v5:
- Mask out I2C_FUNC_SMBUS_QUICK and return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK).
- Link to v4: https://lore.kernel.org/r/20261102-a9-i2c-v4-0-5a169215b8e9@amlogic.com

Changes in v4:
- Repocess xfer len equal 0 use I2C_AQ_NO_ZERO_LEN, and Optimized the function.
- Disable A9_RX_THRESH_READ/A9_TX_THRESH_WRITE enables of irq when xfer timeout.
- Use guard(spinlock_irqsave) instead for direct call spinlock in xfer timeout process.
- Link to v3: https://lore.kernel.org/r/20261029-a9-i2c-v3-0-7b30ccc00533@amlogic.com

Changes in v3:
- Based on the questions raised by the robot, the data flow was reorganized.
- Some processing was optimized according to Andi's and Markus's suggestions.
- Link to v2: https://lore.kernel.org/r/20261022-a9-i2c-v2-0-45e3cef175bf@amlogic.com

Changes in v2:
- dtbinding: make some minor modifications, suggestted by Conor and robot.
- driver: Make some adjustments, including macro definitions, format adjustments,
          adding quirks, process optimization, and so on. According to Andi and robot's suggestion
- Give up MAINTAINERS file the separate submission, make it together with the driver.
- Link to v1: https://lore.kernel.org/r/20260924-a9-i2c-v1-0-b8ad9b46f4a8@amlogic.com

---
Junyi Zhao (1):
      i2c: amlogic: Add Amlogic A9 I2C controller driver

Xianwei Zhao (1):
      dt-bindings: i2c: add Amlogic A9 I2C controller

 .../devicetree/bindings/i2c/amlogic,a9-i2c.yaml    |  56 +++
 MAINTAINERS                                        |   9 +
 drivers/i2c/busses/Kconfig                         |   8 +
 drivers/i2c/busses/Makefile                        |   1 +
 drivers/i2c/busses/i2c-amlogic-a9.c                | 431 +++++++++++++++++++++
 5 files changed, 505 insertions(+)
---
base-commit: 4ec2365c08de306f52650d8736aef5862baedb8d
change-id: 20260911-a9-i2c-24478e22e683

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