[PATCH 0/2] i2c: cadence: Add support for Axiado AX3000

[Swark Yang]

This patch series adds support for the Cadence I2C controller
integrated into the Axiado AX3000 SoC and enables SMBus Quick
command functionality.

The Axiado AX3000 utilizes the Cadence I2C IP core (version r1p14).
While it is largely compatible with the existing i2c-cadence
driver logic, the AX3000 hardware specifically supports SMBus Quick
commands. This feature is currently disabled by default in the
i2c-cadence driver (masked out from I2C_FUNC_SMBUS_EMUL).

To enable this functionality, this series introduces a new
platform-specific quirk (CDNS_I2C_QUIRK_SMBUS_QUICK) and uses driver
match data for the "axiado,ax3000-i2c" compatible string. This allows
tools like 'i2cdetect' to properly scan the bus using quick write
commands.

The DT binding update follows the recommended fallback structure,
referencing the 'cdns,i2c-r1p14' fallback to ensure compatibility with
older kernels while allowing the new quirk to be enabled on AX3000.

Patch breakdown:

Patch 1: dt-bindings: i2c: cadence: Add Axiado AX3000
Patch 2: i2c: cadence: Add support for Axiado AX3000

These patches are expected to go via the I2C subsystem tree.

Feedback is welcome.

Signed-off-by: Swark Yang <syang at axiado.com>
---
Swark Yang (2):
      dt-bindings: i2c: cadence: Add Axiado AX3000
      i2c: cadence: Add support for Axiado AX3000

 Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml | 10 +++++++---
 drivers/i2c/busses/i2c-cadence.c                          | 10 ++++++++++
 2 files changed, 17 insertions(+), 3 deletions(-)
---
base-commit: 63804fed149a6750ffd28610c5c1c98cce6bd377
change-id: 20260111-axiado-ax3000-cadence-i2c-support-53ec117bb074

Best regards,
-- 
Swark Yang <syang at axiado.com>