[PATCH v3] dt-bindings: interrupt-controller: Convert Amlogic Meson GPIO interrupt controller binding
Heiner Kallweit
hkallweit1 at gmail.com
Tue Jan 31 22:47:58 PST 2023
On 01.02.2023 03:03, Rob Herring wrote:
> On Mon, Jan 30, 2023 at 09:53:21PM +0100, Heiner Kallweit wrote:
>> Convert Amlogic Meson GPIO interrupt controller binding to yaml.
>>
>> Signed-off-by: Heiner Kallweit <hkallweit1 at gmail.com>
>> ---
>> v2:
>> - consider that more than one compatible may be set
>> - remove bus part from example
>> v3:
>> - remove minItem/maxItem properties for compatible
>> ---
>> .../amlogic,meson-gpio-intc.txt | 38 ---------
>> .../amlogic,meson-gpio-intc.yaml | 84 +++++++++++++++++++
>> 2 files changed, 84 insertions(+), 38 deletions(-)
>> delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt
>> create mode 100644 Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt
>> deleted file mode 100644
>> index bde63f8f0..000000000
>> --- a/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt
>> +++ /dev/null
>> @@ -1,38 +0,0 @@
>> -Amlogic meson GPIO interrupt controller
>> -
>> -Meson SoCs contains an interrupt controller which is able to watch the SoC
>> -pads and generate an interrupt on edge or level. The controller is essentially
>> -a 256 pads to 8 GIC interrupt multiplexer, with a filter block to select edge
>> -or level and polarity. It does not expose all 256 mux inputs because the
>> -documentation shows that the upper part is not mapped to any pad. The actual
>> -number of interrupt exposed depends on the SoC.
>> -
>> -Required properties:
>> -
>> -- compatible : must have "amlogic,meson8-gpio-intc" and either
>> - "amlogic,meson8-gpio-intc" for meson8 SoCs (S802) or
>> - "amlogic,meson8b-gpio-intc" for meson8b SoCs (S805) or
>> - "amlogic,meson-gxbb-gpio-intc" for GXBB SoCs (S905) or
>> - "amlogic,meson-gxl-gpio-intc" for GXL SoCs (S905X, S912)
>> - "amlogic,meson-axg-gpio-intc" for AXG SoCs (A113D, A113X)
>> - "amlogic,meson-g12a-gpio-intc" for G12A SoCs (S905D2, S905X2, S905Y2)
>> - "amlogic,meson-sm1-gpio-intc" for SM1 SoCs (S905D3, S905X3, S905Y3)
>> - "amlogic,meson-a1-gpio-intc" for A1 SoCs (A113L)
>> - "amlogic,meson-s4-gpio-intc" for S4 SoCs (S802X2, S905Y4, S805X2G, S905W2)
>> -- reg : Specifies base physical address and size of the registers.
>> -- interrupt-controller : Identifies the node as an interrupt controller.
>> -- #interrupt-cells : Specifies the number of cells needed to encode an
>> - interrupt source. The value must be 2.
>> -- meson,channel-interrupts: Array with the 8 upstream hwirq numbers. These
>> - are the hwirqs used on the parent interrupt controller.
>> -
>> -Example:
>> -
>> -gpio_interrupt: interrupt-controller at 9880 {
>> - compatible = "amlogic,meson-gxbb-gpio-intc",
>> - "amlogic,meson-gpio-intc";
>> - reg = <0x0 0x9880 0x0 0x10>;
>> - interrupt-controller;
>> - #interrupt-cells = <2>;
>> - meson,channel-interrupts = <64 65 66 67 68 69 70 71>;
>> -};
>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.yaml
>> new file mode 100644
>> index 000000000..da55a2d25
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.yaml
>> @@ -0,0 +1,84 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/interrupt-controller/amlogic,meson-gpio-intc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Amlogic Meson GPIO interrupt controller
>> +
>> +maintainers:
>> + - Heiner Kallweit <hkallweit1 at gmail.com>
>> +
>> +description: |
>> + Meson SoCs contains an interrupt controller which is able to watch the SoC
>> + pads and generate an interrupt on edge or level. The controller is essentially
>> + a 256 pads to 8 GIC interrupt multiplexer, with a filter block to select edge
>> + or level and polarity. It does not expose all 256 mux inputs because the
>> + documentation shows that the upper part is not mapped to any pad. The actual
>> + number of interrupt exposed depends on the SoC.
>> +
>> +allOf:
>> + - $ref: /schemas/interrupt-controller.yaml#
>> +
>> +properties:
>> + compatible:
>> + oneOf:
>> + - items:
>> + - enum:
>> + - amlogic,meson-gpio-intc
>> + - amlogic,meson8-gpio-intc
>> + - amlogic,meson8b-gpio-intc
>> + - amlogic,meson-gxbb-gpio-intc
>> + - amlogic,meson-gxl-gpio-intc
>> + - amlogic,meson-axg-gpio-intc
>> + - amlogic,meson-g12a-gpio-intc
>> + - amlogic,meson-sm1-gpio-intc
>> + - amlogic,meson-a1-gpio-intc
>> + - amlogic,meson-s4-gpio-intc
>> + - items:
>> + - enum:
>> + - amlogic,meson8-gpio-intc
>
> We allow this with or without a fallback? Again, that should not be
> allowed and any dts files fixed.
>
I'll check this and will see if and which dts files need fixing.
>> + - amlogic,meson-axg-gpio-intc
>> + - amlogic,meson-g12a-gpio-intc
>> + - amlogic,meson-sm1-gpio-intc
>> + - amlogic,meson-s4-gpio-intc
>> + - const: amlogic,meson-gpio-intc
>> + - items:
>> + - const: amlogic,meson-gpio-intc
>> + - enum:
>> + - amlogic,meson8b-gpio-intc
>> + - amlogic,meson-gxbb-gpio-intc
>> + - amlogic,meson-gxl-gpio-intc
>
> This looks wrong. The order is most specific to least specific
> compatible. amlogic,meson-gpio-intc is more specific (or a superset of)
> than amlogic,meson8b-gpio-intc?
>
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + interrupt-controller: true
>> +
>> + "#interrupt-cells":
>> + const: 2
>> +
>> + amlogic,channel-interrupts:
>
> This was 'meson', not 'amlogic'. You can't just change things.
>
In driver and dts it has been 'amlogic' since 2017.
Obviously the documentation has been wrong.
> Really, 'interrupts' should have been used here, but oh well.
>
I remember there was a discussion back then on why 'interrupts'
wouldn't be a good fit here. Don't remember the details,
but the current naming is the result of a longer discussion.
>> + description: Array with the upstream hwirq numbers
>> + minItems: 8
>> + maxItems: 12
>> + $ref: /schemas/types.yaml#/definitions/uint32-array
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - interrupt-controller
>> + - "#interrupt-cells"
>> + - amlogic,channel-interrupts
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + interrupt-controller at 9880 {
>> + compatible = "amlogic,meson-gxbb-gpio-intc";
>> + reg = <0x9880 0x10>;
>> + interrupt-controller;
>> + #interrupt-cells = <2>;
>> + amlogic,channel-interrupts = <64 65 66 67 68 69 70 71>;
>> + };
>> --
>> 2.39.1
>>
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