On Mon, 2017-03-27 at 22:12 -0700, Brendan Higgins wrote:
> Added device tree binding documentation for Aspeed I2C Interrupt
> Controller.
It's a little bit overkill ... It's not so much an interrupt controller
than a single "summary" register that reflects the state of the
interrupts of all the i2c controllers ;-) It can't do anything with
them, no individual masking or acking or similar.
In fact to be honest I wouldn't even have bothered making it an
irq_domain in the first place though it *is* nice I admit to see the
interrupt counts per bus in /proc/interrupts as a result.
Cheers,
Ben.
> Signed-off-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
> ---
> Added in v6:
> - Pulled "aspeed_i2c_controller" out into a interrupt controller
> since that is
> what it actually does.
> ---
> .../interrupt-controller/aspeed,ast2400-i2c-ic.txt | 25
> ++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/interrupt-
> controller/aspeed,ast2400-i2c-ic.txt
>
> diff --git a/Documentation/devicetree/bindings/interrupt-
> controller/aspeed,ast2400-i2c-ic.txt
> b/Documentation/devicetree/bindings/interrupt-
> controller/aspeed,ast2400-i2c-ic.txt
> new file mode 100644
> index 000000000000..033cc82e5684
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-
> controller/aspeed,ast2400-i2c-ic.txt
> @@ -0,0 +1,25 @@
> +Device tree configuration for the I2C Interrupt Controller on the
> AST24XX and
> +AST25XX SoCs.
> +
> +Required Properties:
> +- #address-cells : should be 1
> +- #size-cells : should be 1
> +- #interrupt-cells : should be 1
> +- compatible : should be "aspeed,ast2400-i2c-ic"
> + or "aspeed,ast2500-i2c-ic"
> +- reg : address start and range of controller
> +- interrupts : interrupt number
> +- interrupt-controller : denotes that the controller receives
> and fires
> + new interrupts for child busses
> +
> +Example:
> +
> +i2c_ic: interrupt-controller@0 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + #interrupt-cells = <1>;
> + compatible = "aspeed,ast2400-i2c-ic";
> + reg = <0x0 0x40>;
> + interrupts = <12>;
> + interrupt-controller;
> +};
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