| # 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>; |
| }; |
| }; |
| }; |
