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Date: Tue, 14 Sep 2021 10:29:52 -0500
From: Rob Herring <robh@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: net: Add bindings for IXP4xx V.35 WAN HSS
On Thu, Sep 09, 2021 at 12:11:18AM +0200, Linus Walleij wrote:
> This adds device tree bindings for the IXP4xx V.35 WAN high
> speed serial (HSS) link.
>
> An example is added to the NPE example where the HSS appears
> as a child.
>
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> Currently only adding these bindings so we can describe the
> hardware in device trees.
> ---
> ...ntel,ixp4xx-network-processing-engine.yaml | 26 ++++
> .../bindings/net/intel,ixp4xx-hss.yaml | 129 ++++++++++++++++++
> 2 files changed, 155 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/net/intel,ixp4xx-hss.yaml
>
> diff --git a/Documentation/devicetree/bindings/firmware/intel,ixp4xx-network-processing-engine.yaml b/Documentation/devicetree/bindings/firmware/intel,ixp4xx-network-processing-engine.yaml
> index c435c9f369a4..179e5dea32b0 100644
> --- a/Documentation/devicetree/bindings/firmware/intel,ixp4xx-network-processing-engine.yaml
> +++ b/Documentation/devicetree/bindings/firmware/intel,ixp4xx-network-processing-engine.yaml
> @@ -45,9 +45,35 @@ additionalProperties: false
>
> examples:
> - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> npe: npe@...06000 {
> compatible = "intel,ixp4xx-network-processing-engine";
> reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + hss@0 {
> + compatible = "intel,ixp4xx-hss";
> + reg = <0>;
> + intel,npe-handle = <&npe 0>;
> + queue-chl-rxtrig = <&qmgr 12>;
> + queue-pkt-rx = <&qmgr 13>;
> + queue-pkt-tx0 = <&qmgr 14>;
> + queue-pkt-tx1 = <&qmgr 15>;
> + queue-pkt-tx2 = <&qmgr 16>;
> + queue-pkt-tx3 = <&qmgr 17>;
> + queue-pkt-rxfree0 = <&qmgr 18>;
> + queue-pkt-rxfree1 = <&qmgr 19>;
> + queue-pkt-rxfree2 = <&qmgr 20>;
> + queue-pkt-rxfree3 = <&qmgr 21>;
> + queue-pkt-txdone = <&qmgr 22>;
Need vendor prefix on all these. Maybe some can be arrays (e.g. tx0,
tx1, tx2, tx3)?
> + cts-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
> + rts-gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
> + dcd-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
> + dtr-gpios = <&gpio_74 2 GPIO_ACTIVE_LOW>;
> + clk-internal-gpios = <&gpio_74 0 GPIO_ACTIVE_HIGH>;
> + };
>
> crypto {
> compatible = "intel,ixp4xx-crypto";
> diff --git a/Documentation/devicetree/bindings/net/intel,ixp4xx-hss.yaml b/Documentation/devicetree/bindings/net/intel,ixp4xx-hss.yaml
> new file mode 100644
> index 000000000000..a5a9a14a1242
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/intel,ixp4xx-hss.yaml
> @@ -0,0 +1,129 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2021 Linaro Ltd.
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/net/intel,ixp4xx-hss.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Intel IXP4xx V.35 WAN High Speed Serial Link (HSS)
> +
> +maintainers:
> + - Linus Walleij <linus.walleij@...aro.org>
> +
> +description: |
> + The Intel IXP4xx HSS makes use of the IXP4xx NPE (Network
> + Processing Engine) and the IXP4xx Queue Manager to process
> + V.35 Wideband Modem (WAN) links.
> +
> +properties:
> + compatible:
> + const: intel,ixp4xx-hss
> +
> + reg:
> + maxItems: 1
> + description: The HSS instance
> +
> + intel,npe-handle:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the NPE this HSS instance is using
> + and the instance to use in the second cell
> +
> + queue-chl-rxtrig:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the RX trigger queue on the NPE
> +
> + queue-pkt-rx:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet RX queue on the NPE
> +
> + queue-pkt-tx0:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet TX0 queue on the NPE
> +
> + queue-pkt-tx1:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet TX1 queue on the NPE
> +
> + queue-pkt-tx2:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet TX2 queue on the NPE
> +
> + queue-pkt-tx3:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet TX3 queue on the NPE
> +
> + queue-pkt-rxfree0:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet RXFREE0 queue on the NPE
> +
> + queue-pkt-rxfree1:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet RXFREE1 queue on the NPE
> +
> + queue-pkt-rxfree2:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet RXFREE2 queue on the NPE
> +
> + queue-pkt-rxfree3:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet RXFREE3 queue on the NPE
> +
> + queue-pkt-txdone:
> + $ref: '/schemas/types.yaml#/definitions/phandle-array'
> + maxItems: 1
> + description: phandle to the packet TXDONE queue on the NPE
> +
> + cts-gpios:
> + maxItems: 1
> + description: Clear To Send (CTS) GPIO line
> +
> + rts-gpios:
> + maxItems: 1
> + description: Ready To Send (RTS) GPIO line
> +
> + dcd-gpios:
> + maxItems: 1
> + description: Data Carrier Detect (DCD) GPIO line
> +
> + dtr-gpios:
> + maxItems: 1
> + description: Data Terminal Ready (DTR) GPIO line
> +
> + clk-internal-gpios:
> + maxItems: 1
> + description: Clock internal GPIO line, driving this high will make the HSS
> + use internal clocking as opposed to external clocking
> +
> +required:
> + - compatible
> + - reg
> + - intel,npe-handle
> + - queue-chl-rxtrig
> + - queue-pkt-rx
> + - queue-pkt-tx0
> + - queue-pkt-tx1
> + - queue-pkt-tx2
> + - queue-pkt-tx3
> + - queue-pkt-rxfree0
> + - queue-pkt-rxfree1
> + - queue-pkt-rxfree2
> + - queue-pkt-rxfree3
> + - queue-pkt-txdone
> + - cts-gpios
> + - rts-gpios
> + - dcd-gpios
> + - dtr-gpios
> + - clk-internal-gpios
> +
> +additionalProperties: false
> --
> 2.31.1
>
>
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