[PATCH 19/26] dt-bindings: net: Add the Lantiq PEF2256 E1/T1/J1 framer

Herve Codina
2023-07-25T09:27:51Z

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>
---
.../bindings/net/lantiq,pef2256.yaml | 226 ++++++++++++++++++
1 file changed, 226 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/lantiq,pef2256.yaml

diff --git a/Documentation/devicetree/bindings/net/lantiq,pef2256.yaml b/Documentation/devicetree/bindings/net/lantiq,pef2256.yaml
new file mode 100644
index 000000000000..b369a20d61b1
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/lantiq,pef2256.yaml
@@ -0,0 +1,226 @@
+# 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: Receive System Clock
+ - description: Transmit System Clock
+
+ clock-names:
+ items:
+ - const: mclk
+ - const: sclkr
+ - const: sclkx
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ description:
+ GPIO used to reset the device.
+ maxItems: 1
+
+ '#framer-cells':
+ const: 0
+
+ pinctrl:
+ $ref: /schemas/pinctrl/pinctrl.yaml#
+ additionalProperties: false
+
+ patternProperties:
+ '-pins$':
+ type: object
+ $ref: /schemas/pinctrl/pincfg-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:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ 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:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3, 4, 5, 6, 7]
+ default: 0
+ description:
+ The pef2256 delivers a full frame (32 8bit time-slots in E1 and 24 8bit
+ time-slots 8 8bit signaling in E1/J1) every 125us. This lead to a data
+ rate of 2048000 bit/s. When lantiq,data-rate-bps is more than 2048000
+ bit/s, the data (all 32 8bit) present in the frame are interleave with
+ unused time-slots. The lantiq,channel-phase property allows to set the
+ correct alignment of the interleave mechanism.
+ For instance, suppose lantiq,data-rate-bps = 8192000 (ie 4*2048000), and
+ lantiq,channel-phase = 2, the interleave schema with unused time-slots
+ (nu) and used time-slots (XX) for TSi is
+ nu nu XX nu nu nu XX nu nu nu XX nu
+ <-- TSi --> <- TSi+1 -> <- TSi+2 ->
+ With lantiq,data-rate-bps = 8192000, and lantiq,channel-phase = 1, the
+ interleave schema is
+ nu XX nu nu nu XX nu nu nu XX nu nu
+ <-- TSi --> <- TSi+1 -> <- TSi+2 ->
+ With lantiq,data-rate-bps = 4096000 (ie 2*2048000), and
+ lantiq,channel-phase = 1, the interleave schema is
+ nu XX nu XX nu XX
+ <-- TSi --> <- TSi+1 -> <- TSi+2 ->
+
+patternProperties:
+ '^codec(-([0-9]|[1-2][0-9]|3[0-1]))?$':
+ 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 8bit 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
+
+ framer:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ phandle to the framer node
+
+ required:
+ - compatible
+ - '#sound-dai-cells'
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - interrupts
+ - '#framer-cells'
+
+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>;
+ #framer-cells = <0>;
+
+ 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";
+ framer = <&pef2256>;
+ #sound-dai-cells = <0>;
+ sound-name-prefix = "PEF2256_0";
+ };
+
+ pef2256_codec1: codec-1 {
+ compatible = "lantiq,pef2256-codec";
+ framer = <&pef2256>;
+ #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>;
+ };
+ };
+ };
--
2.41.0