Add a binding description for Realtek's GPIO controller found on several
of their MIPS-based SoCs (codenamed Otto), such as the RTL838x and
RTL839x series of switch SoCs.
A fallback binding 'realtek,otto-gpio' is provided for cases where the
actual port ordering is not known yet, and enabling the interrupt
controller may result in uncaught interrupts.
Signed-off-by: Sander Vanheule <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
---
.../bindings/gpio/gpio-realtek-otto.yaml | 80 +++++++++++++++++++
1 file changed, 80 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
diff --git a/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml b/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
new file mode 100644
index 000000000000..3e8151e3a169
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-realtek-otto.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek Otto GPIO controller
+
+maintainers:
+ - Sander Vanheule <[email protected]>
+ - Bert Vermeulen <[email protected]>
+
+description: |
+ Realtek's GPIO controller on their MIPS switch SoCs (Otto platform) consists
+ of two banks of 32 GPIOs. These GPIOs can generate edge-triggered interrupts.
+ Each bank's interrupts are cascased into one interrupt line on the parent
+ interrupt controller, if provided.
+ This binding allows defining a single bank in the devicetree. The interrupt
+ controller is not supported on the fallback compatible name, which only
+ allows for GPIO port use.
+
+properties:
+ $nodename:
+ pattern: "^gpio@[0-9a-f]+$"
+
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - realtek,rtl8380-gpio
+ - realtek,rtl8390-gpio
+ - const: realtek,otto-gpio
+ - const: realtek,otto-gpio
+
+ reg:
+ maxItems: 1
+
+ "#gpio-cells":
+ const: 2
+
+ gpio-controller: true
+
+ ngpios:
+ minimum: 1
+ maximum: 32
+
+ interrupt-controller: true
+
+ "#interrupt-cells":
+ const: 2
+
+ interrupts:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - "#gpio-cells"
+ - gpio-controller
+
+additionalProperties: false
+
+dependencies:
+ interrupt-controller: [ interrupts ]
+
+examples:
+ - |
+ gpio@3500 {
+ compatible = "realtek,rtl8380-gpio", "realtek,otto-gpio";
+ reg = <0x3500 0x1c>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ ngpios = <24>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&rtlintc>;
+ interrupts = <23>;
+ };
+
+...
--
2.30.2
On Mon, Mar 15, 2021 at 08:08:05PM +0100, Sander Vanheule wrote:
> Add a binding description for Realtek's GPIO controller found on several
> of their MIPS-based SoCs (codenamed Otto), such as the RTL838x and
> RTL839x series of switch SoCs.
>
> A fallback binding 'realtek,otto-gpio' is provided for cases where the
> actual port ordering is not known yet, and enabling the interrupt
> controller may result in uncaught interrupts.
>
> Signed-off-by: Sander Vanheule <[email protected]>
> Reviewed-by: Linus Walleij <[email protected]>
> ---
> .../bindings/gpio/gpio-realtek-otto.yaml | 80 +++++++++++++++++++
Use compatible string: realtek,otto-gpio.yaml
> 1 file changed, 80 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml b/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
> new file mode 100644
> index 000000000000..3e8151e3a169
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/gpio-realtek-otto.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Realtek Otto GPIO controller
> +
> +maintainers:
> + - Sander Vanheule <[email protected]>
> + - Bert Vermeulen <[email protected]>
> +
> +description: |
> + Realtek's GPIO controller on their MIPS switch SoCs (Otto platform) consists
> + of two banks of 32 GPIOs. These GPIOs can generate edge-triggered interrupts.
> + Each bank's interrupts are cascased into one interrupt line on the parent
> + interrupt controller, if provided.
> + This binding allows defining a single bank in the devicetree. The interrupt
> + controller is not supported on the fallback compatible name, which only
> + allows for GPIO port use.
> +
> +properties:
> + $nodename:
> + pattern: "^gpio@[0-9a-f]+$"
> +
> + compatible:
> + oneOf:
> + - items:
> + - enum:
> + - realtek,rtl8380-gpio
> + - realtek,rtl8390-gpio
> + - const: realtek,otto-gpio
> + - const: realtek,otto-gpio
This should be dropped. You should always have an SoC specific
compatible.
> +
> + reg:
> + maxItems: 1
> +
> + "#gpio-cells":
> + const: 2
> +
> + gpio-controller: true
> +
> + ngpios:
> + minimum: 1
> + maximum: 32
> +
> + interrupt-controller: true
> +
> + "#interrupt-cells":
> + const: 2
> +
> + interrupts:
> + maxItems: 1
> +
> +required:
> + - compatible
> + - reg
> + - "#gpio-cells"
> + - gpio-controller
> +
> +additionalProperties: false
> +
> +dependencies:
> + interrupt-controller: [ interrupts ]
> +
> +examples:
> + - |
> + gpio@3500 {
> + compatible = "realtek,rtl8380-gpio", "realtek,otto-gpio";
> + reg = <0x3500 0x1c>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + ngpios = <24>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + interrupt-parent = <&rtlintc>;
> + interrupts = <23>;
> + };
> +
> +...
> --
> 2.30.2
>