On Tue, Sep 24, 2024 at 11:02:28AM +1200, Chris Packham wrote: > Add dtschema for the I2C controller on the RTL9300 SoC. The I2C > controllers on this SoC are part of the "switch" block which is > represented here as a syscon node. The SCL pins are dependent on the I2C > controller (GPIO8 for the first controller, GPIO 17 for the second). The > SDA pins can be assigned to either one of the I2C controllers (but not > both). > > Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx> > --- > > Notes: > Changes in v3: > - Remove parent node in example > - put unevaluatedProperties after required > - Add #address-cells and #size-cells > > Changes in v2: > - Use reg property for controller registers > - Remove global-control-offset (will be hard coded in driver) > - Integrated the multiplexing function. Child nodes now represent the > available SDA lines > > .../bindings/i2c/realtek,rtl9300-i2c.yaml | 80 +++++++++++++++++++ > MAINTAINERS | 6 ++ > 2 files changed, 86 insertions(+) > create mode 100644 Documentation/devicetree/bindings/i2c/realtek,rtl9300-i2c.yaml > > diff --git a/Documentation/devicetree/bindings/i2c/realtek,rtl9300-i2c.yaml b/Documentation/devicetree/bindings/i2c/realtek,rtl9300-i2c.yaml > new file mode 100644 > index 000000000000..979ec22e81f1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/i2c/realtek,rtl9300-i2c.yaml > @@ -0,0 +1,80 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/i2c/realtek,rtl9300-i2c.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Realtek RTL I2C Controller > + > +maintainers: > + - Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx> > + > +description: > + The RTL9300 SoC has two I2C controllers. Each of these has an SCL line (which > + if not-used for SCL can be a GPIO). There are 8 common SDA lines that can be > + assigned to either I2C controller. > + > +properties: > + compatible: > + const: realtek,rtl9300-i2c You need SoC-specific compatibles in the front followed by this fallback. For each SoC. Best regards, Krzysztof
