[PATCH 14/17] dt-bindings/interrupt-controller: add description for Marvell SEI node

[Rob Herring]

On Sat, Apr 21, 2018 at 03:55:34PM +0200, Miquel Raynal wrote:
> Describe the SEI (System Error Interrupt) controller driver. The
> controller is part of the GIC. It aggregates two types of interrupts,
> wired and MSIs from respectively the AP and the CPs, into a single SPI
> interrupt.
> 
> Suggested-by: Haim Boot <hayim at marvell.com>
> Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
> ---
>  .../bindings/interrupt-controller/marvell,sei.txt  | 54 ++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/marvell,sei.txt
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/marvell,sei.txt b/Documentation/devicetree/bindings/interrupt-controller/marvell,sei.txt
> new file mode 100644
> index 000000000000..a246d59552b1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/marvell,sei.txt
> @@ -0,0 +1,54 @@
> +Marvell SEI (System Error Interrupt) Controller
> +-----------------------------------------------
> +
> +Marvell SEI (System Error Interrupt) controller is an interrupt aggregator.
> +It receives interrupts from several sources and aggregates them to a single
> +interrupt line (an SPI) on the primary interrupt controller.
> +
> +The IRQ chip can handle up to 64 SEIs, a set comes from the AP and is
> +wired while a second set comes from the CPs by the mean of MSIs. Each
> +'domain' is represented as a subnode.
> +
> +Required properties:
> +
> +- compatible: should be "marvell,armada-8k-sei".
> +- reg: SEI registers location and length.
> +- interrupts: identifies the parent IRQ that will be triggered.
> +- #address-cells: should be '1', represents the position of the first
> +                  IRQ of a given type in the SEI range.
> +- #size-cells: should be '1', represents the number of a given type of
> +               IRQs.
> +
> +Child node 'sei-wired-controller' required properties:
> +
> +- reg: the range of wired interrupts.
> +- #interrupt-cells: number of cells to define an SEI wired interrupt
> +                    coming from the AP, should be 1. The cell is the IRQ
> +                    number.
> +- interrupt-controller: identifies the node as an interrupt controller.
> +
> +Child node 'sei-msi-controller' required properties:
> +
> +- reg: the range of non-wired interrupts triggered by way of MSIs.
> +- msi-controller: identifies the node as an MSI controller.
> +
> +Example:
> +
> +        sei: sei at 3f0200 {
> +               compatible = "marvell,armada-8k-sei";
> +               reg = <0x3f0200 0x40>;
> +               interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +
> +               sei_wired_controller: sei-wired-controller at 0 {
> +                       reg = <0 21>;

Using interrupt numbers in reg is strange.

> +                       #interrupt-cells = <1>;
> +                       interrupt-controller;
> +               };
> +
> +               sei_msi_controller: sei-msi-controller at 21 {
> +                       reg = <21 43>;
> +                       msi-controller;

Can't the parent be both an interrupt-controller and msi-controller?

> +               };
> +       };
> -- 
> 2.14.1
>