dt-bindings: net: Add the Lantiq PEF2256 E1/T1/J1 framer
The Lantiq PEF2256 is a framer and line interface component designed to fulfill all required interfacing between an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus. Signed-off-by: Herve Codina <herve.codina@bootlin.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20231128132534.258459-3-herve.codina@bootlin.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Herve Codina
Linus Walleij
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Documentation/devicetree/bindings/net/lantiq,pef2256.yaml
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213
Documentation/devicetree/bindings/net/lantiq,pef2256.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/lantiq,pef2256.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Lantiq PEF2256
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maintainers:
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- Herve Codina <herve.codina@bootlin.com>
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description:
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The Lantiq PEF2256, also known as Infineon PEF2256 or FALC56, is a framer and
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line interface component designed to fulfill all required interfacing between
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an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus.
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properties:
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compatible:
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items:
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- const: lantiq,pef2256
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reg:
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maxItems: 1
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clocks:
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items:
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- description: Master Clock
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- description: System Clock Receive
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- description: System Clock Transmit
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clock-names:
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items:
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- const: mclk
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- const: sclkr
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- const: sclkx
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interrupts:
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maxItems: 1
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reset-gpios:
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description:
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GPIO used to reset the device.
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maxItems: 1
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pinctrl:
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$ref: /schemas/pinctrl/pinctrl.yaml#
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additionalProperties: false
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patternProperties:
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'-pins$':
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type: object
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$ref: /schemas/pinctrl/pinmux-node.yaml#
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additionalProperties: false
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properties:
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pins:
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enum: [ RPA, RPB, RPC, RPD, XPA, XPB, XPC, XPD ]
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function:
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enum: [ SYPR, RFM, RFMB, RSIGM, RSIG, DLR, FREEZE, RFSP, LOS,
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SYPX, XFMS, XSIG, TCLK, XMFB, XSIGM, DLX, XCLK, XLT,
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GPI, GPOH, GPOL ]
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required:
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- pins
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- function
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lantiq,data-rate-bps:
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enum: [2048000, 4096000, 8192000, 16384000]
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default: 2048000
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description:
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Data rate (bit per seconds) on the system highway.
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lantiq,clock-falling-edge:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Data is sent on falling edge of the clock (and received on the rising
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edge). If 'clock-falling-edge' is not present, data is sent on the
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rising edge (and received on the falling edge).
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lantiq,channel-phase:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2, 3, 4, 5, 6, 7]
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default: 0
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description: |
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The pef2256 delivers a full frame (32 8-bit time-slots in E1 and 24 8-bit
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time-slots 8 8-bit signaling in E1/J1) every 125us. This lead to a data
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rate of 2048000 bit/s. When lantiq,data-rate-bps is more than 2048000
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bit/s, the data (all 32 8-bit) present in the frame are interleave with
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unused time-slots. The lantiq,channel-phase property allows to set the
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correct alignment of the interleave mechanism.
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For instance, suppose lantiq,data-rate-bps = 8192000 (ie 4*2048000), and
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lantiq,channel-phase = 2, the interleave schema with unused time-slots
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(nu) and used time-slots (XX) for TSi is
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nu nu XX nu nu nu XX nu nu nu XX nu
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<-- TSi --> <- TSi+1 -> <- TSi+2 ->
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With lantiq,data-rate-bps = 8192000, and lantiq,channel-phase = 1, the
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interleave schema is
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nu XX nu nu nu XX nu nu nu XX nu nu
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<-- TSi --> <- TSi+1 -> <- TSi+2 ->
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With lantiq,data-rate-bps = 4096000 (ie 2*2048000), and
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lantiq,channel-phase = 1, the interleave schema is
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nu XX nu XX nu XX
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<-- TSi --> <- TSi+1 -> <- TSi+2 ->
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patternProperties:
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'^codec(-([0-9]|[1-2][0-9]|3[0-1]))?$':
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type: object
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$ref: /schemas/sound/dai-common.yaml
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unevaluatedProperties: false
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description:
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Codec provided by the pef2256. This codec allows to use some of the PCM
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system highway time-slots as audio channels to transport audio data over
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the E1/T1/J1 lines.
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The time-slots used by the codec must be set and so, the properties
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'dai-tdm-slot-num', 'dai-tdm-slot-width', 'dai-tdm-slot-tx-mask' and
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'dai-tdm-slot-rx-mask' must be present in the sound card node for
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sub-nodes that involve the codec. The codec uses 8-bit time-slots.
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'dai-tdm-tdm-slot-with' must be set to 8.
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The tx and rx masks define the pef2256 time-slots assigned to the codec.
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properties:
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compatible:
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const: lantiq,pef2256-codec
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'#sound-dai-cells':
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const: 0
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required:
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- compatible
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- '#sound-dai-cells'
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- interrupts
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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pef2256: framer@2000000 {
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compatible = "lantiq,pef2256";
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reg = <0x2000000 0x100>;
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interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
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interrupt-parent = <&intc>;
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clocks = <&clk_mclk>, <&clk_sclkr>, <&clk_sclkx>;
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clock-names = "mclk", "sclkr", "sclkx";
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reset-gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
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lantiq,data-rate-bps = <4096000>;
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pinctrl {
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pef2256_rpa_sypr: rpa-pins {
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pins = "RPA";
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function = "SYPR";
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};
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pef2256_xpa_sypx: xpa-pins {
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pins = "XPA";
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function = "SYPX";
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};
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};
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pef2256_codec0: codec-0 {
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compatible = "lantiq,pef2256-codec";
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#sound-dai-cells = <0>;
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sound-name-prefix = "PEF2256_0";
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};
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pef2256_codec1: codec-1 {
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compatible = "lantiq,pef2256-codec";
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#sound-dai-cells = <0>;
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sound-name-prefix = "PEF2256_1";
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};
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};
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sound {
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compatible = "simple-audio-card";
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#address-cells = <1>;
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#size-cells = <0>;
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simple-audio-card,dai-link@0 { /* CPU DAI1 - pef2256 codec 1 */
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reg = <0>;
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cpu {
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sound-dai = <&cpu_dai1>;
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};
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codec {
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sound-dai = <&pef2256_codec0>;
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dai-tdm-slot-num = <4>;
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dai-tdm-slot-width = <8>;
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/* TS 1, 2, 3, 4 */
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dai-tdm-slot-tx-mask = <0 1 1 1 1>;
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dai-tdm-slot-rx-mask = <0 1 1 1 1>;
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};
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};
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simple-audio-card,dai-link@1 { /* CPU DAI2 - pef2256 codec 2 */
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reg = <1>;
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cpu {
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sound-dai = <&cpu_dai2>;
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};
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codec {
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sound-dai = <&pef2256_codec1>;
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dai-tdm-slot-num = <4>;
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dai-tdm-slot-width = <8>;
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/* TS 5, 6, 7, 8 */
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dai-tdm-slot-tx-mask = <0 0 0 0 0 1 1 1 1>;
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dai-tdm-slot-rx-mask = <0 0 0 0 0 1 1 1 1>;
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};
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};
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};
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