# 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>;
};
};
};
