1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/net/lantiq,pef2256.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Lantiq PEF2256
8
9 maintainers:
10 - Herve Codina <herve.codina@bootlin.com>
11
12 description:
13 The Lantiq PEF2256, also known as Infineon PEF2256 or FALC56, is a framer and
14 line interface component designed to fulfill all required interfacing between
15 an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus.
16
17 properties:
18 compatible:
19 items:
20 - const: lantiq,pef2256
21
22 reg:
23 maxItems: 1
24
25 clocks:
26 items:
27 - description: Master Clock
28 - description: System Clock Receive
29 - description: System Clock Transmit
30
31 clock-names:
32 items:
33 - const: mclk
34 - const: sclkr
35 - const: sclkx
36
37 interrupts:
38 maxItems: 1
39
40 reset-gpios:
41 description:
42 GPIO used to reset the device.
43 maxItems: 1
44
45 pinctrl:
46 $ref: /schemas/pinctrl/pinctrl.yaml#
47 additionalProperties: false
48
49 patternProperties:
50 '-pins$':
51 type: object
52 $ref: /schemas/pinctrl/pinmux-node.yaml#
53 additionalProperties: false
54
55 properties:
56 pins:
57 enum: [ RPA, RPB, RPC, RPD, XPA, XPB, XPC, XPD ]
58
59 function:
60 enum: [ SYPR, RFM, RFMB, RSIGM, RSIG, DLR, FREEZE, RFSP, LOS,
61 SYPX, XFMS, XSIG, TCLK, XMFB, XSIGM, DLX, XCLK, XLT,
62 GPI, GPOH, GPOL ]
63
64 required:
65 - pins
66 - function
67
68 lantiq,data-rate-bps:
69 enum: [2048000, 4096000, 8192000, 16384000]
70 default: 2048000
71 description:
72 Data rate (bit per seconds) on the system highway.
73
74 lantiq,clock-falling-edge:
75 $ref: /schemas/types.yaml#/definitions/flag
76 description:
77 Data is sent on falling edge of the clock (and received on the rising
78 edge). If 'clock-falling-edge' is not present, data is sent on the
79 rising edge (and received on the falling edge).
80
81 lantiq,channel-phase:
82 $ref: /schemas/types.yaml#/definitions/uint32
83 enum: [0, 1, 2, 3, 4, 5, 6, 7]
84 default: 0
85 description: |
86 The pef2256 delivers a full frame (32 8-bit time-slots in E1 and 24 8-bit
87 time-slots 8 8-bit signaling in E1/J1) every 125us. This lead to a data
88 rate of 2048000 bit/s. When lantiq,data-rate-bps is more than 2048000
89 bit/s, the data (all 32 8-bit) present in the frame are interleave with
90 unused time-slots. The lantiq,channel-phase property allows to set the
91 correct alignment of the interleave mechanism.
92 For instance, suppose lantiq,data-rate-bps = 8192000 (ie 4*2048000), and
93 lantiq,channel-phase = 2, the interleave schema with unused time-slots
94 (nu) and used time-slots (XX) for TSi is
95 nu nu XX nu nu nu XX nu nu nu XX nu
96 <-- TSi --> <- TSi+1 -> <- TSi+2 ->
97 With lantiq,data-rate-bps = 8192000, and lantiq,channel-phase = 1, the
98 interleave schema is
99 nu XX nu nu nu XX nu nu nu XX nu nu
100 <-- TSi --> <- TSi+1 -> <- TSi+2 ->
101 With lantiq,data-rate-bps = 4096000 (ie 2*2048000), and
102 lantiq,channel-phase = 1, the interleave schema is
103 nu XX nu XX nu XX
104 <-- TSi --> <- TSi+1 -> <- TSi+2 ->
105
106 patternProperties:
107 '^codec(-([0-9]|[1-2][0-9]|3[0-1]))?$':
108 type: object
109 $ref: /schemas/sound/dai-common.yaml
110 unevaluatedProperties: false
111 description:
112 Codec provided by the pef2256. This codec allows to use some of the PCM
113 system highway time-slots as audio channels to transport audio data over
114 the E1/T1/J1 lines.
115 The time-slots used by the codec must be set and so, the properties
116 'dai-tdm-slot-num', 'dai-tdm-slot-width', 'dai-tdm-slot-tx-mask' and
117 'dai-tdm-slot-rx-mask' must be present in the sound card node for
118 sub-nodes that involve the codec. The codec uses 8-bit time-slots.
119 'dai-tdm-tdm-slot-with' must be set to 8.
120 The tx and rx masks define the pef2256 time-slots assigned to the codec.
121
122 properties:
123 compatible:
124 const: lantiq,pef2256-codec
125
126 '#sound-dai-cells':
127 const: 0
128
129 required:
130 - compatible
131 - '#sound-dai-cells'
132
133 required:
134 - compatible
135 - reg
136 - clocks
137 - clock-names
138 - interrupts
139
140 additionalProperties: false
141
142 examples:
143 - |
144 #include <dt-bindings/gpio/gpio.h>
145 #include <dt-bindings/interrupt-controller/irq.h>
146
147 pef2256: framer@2000000 {
148 compatible = "lantiq,pef2256";
149 reg = <0x2000000 0x100>;
150 interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
151 interrupt-parent = <&intc>;
152 clocks = <&clk_mclk>, <&clk_sclkr>, <&clk_sclkx>;
153 clock-names = "mclk", "sclkr", "sclkx";
154 reset-gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
155 lantiq,data-rate-bps = <4096000>;
156
157 pinctrl {
158 pef2256_rpa_sypr: rpa-pins {
159 pins = "RPA";
160 function = "SYPR";
161 };
162 pef2256_xpa_sypx: xpa-pins {
163 pins = "XPA";
164 function = "SYPX";
165 };
166 };
167
168 pef2256_codec0: codec-0 {
169 compatible = "lantiq,pef2256-codec";
170 #sound-dai-cells = <0>;
171 sound-name-prefix = "PEF2256_0";
172 };
173
174 pef2256_codec1: codec-1 {
175 compatible = "lantiq,pef2256-codec";
176 #sound-dai-cells = <0>;
177 sound-name-prefix = "PEF2256_1";
178 };
179 };
180
181 sound {
182 compatible = "simple-audio-card";
183 #address-cells = <1>;
184 #size-cells = <0>;
185 simple-audio-card,dai-link@0 { /* CPU DAI1 - pef2256 codec 1 */
186 reg = <0>;
187 cpu {
188 sound-dai = <&cpu_dai1>;
189 };
190 codec {
191 sound-dai = <&pef2256_codec0>;
192 dai-tdm-slot-num = <4>;
193 dai-tdm-slot-width = <8>;
194 /* TS 1, 2, 3, 4 */
195 dai-tdm-slot-tx-mask = <0 1 1 1 1>;
196 dai-tdm-slot-rx-mask = <0 1 1 1 1>;
197 };
198 };
199 simple-audio-card,dai-link@1 { /* CPU DAI2 - pef2256 codec 2 */
200 reg = <1>;
201 cpu {
202 sound-dai = <&cpu_dai2>;
203 };
204 codec {
205 sound-dai = <&pef2256_codec1>;
206 dai-tdm-slot-num = <4>;
207 dai-tdm-slot-width = <8>;
208 /* TS 5, 6, 7, 8 */
209 dai-tdm-slot-tx-mask = <0 0 0 0 0 1 1 1 1>;
210 dai-tdm-slot-rx-mask = <0 0 0 0 0 1 1 1 1>;
211 };
212 };
213 };
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