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