On Mon, 17 Nov 2025 10:50:37 +0800, Ryan Chen wrote:

The AST2600 I2C controller introduces a completely new register
map and Separate control/target register sets, unlike the mixed
layout used in AST2400/AST2500.

In addition, at new AST2600 configuration registers and transfer
modes require new DT properties, which are incompatible with
existing bindings. Therefore, this creates a dedicated binding
file for AST2600 to properly describe these new hardware
capabilities.

A subsequent change will modify this new binding to properly
describe the AST2600 hardware.

The example section updated to reflect the actual AST2600 SoC
register layout and interrupt configuration.
Reference: aspeed-g6.dtsi (lines 885-897)

-I2C bus and buffer register offsets
 - AST2600 I2C controller register base starts from 0x80, and the
   buffer region is located at 0xc00, as defined in AST2600 SOC
   register map.

-Interrupt configuration
 - AST2600 I2C controller are connected to ARM GIC interrupt
   controller rather than the legacy internal interrupt controller.

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
---
 .../bindings/i2c/aspeed,ast2600-i2c.yaml      | 66 +++++++++++++++++++
 .../devicetree/bindings/i2c/aspeed,i2c.yaml   |  3 +-
 2 files changed, 67 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:
./Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml:25:1: [warning] too many blank lines (2 > 1) (empty-lines)

dtschema/dtc warnings/errors:

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20251117025040.3622984-2-ryan_chen@aspeedtech.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.