Yo, I'm not au fait enough with this to leave particularly meaningful comments, so just some minor ones for you. On Tue, Sep 12, 2023 at 12:14:44PM +0200, Herve Codina wrote: > 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@xxxxxxxxxxx> > Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx> Missing a co-developed-by? > --- > .../bindings/net/lantiq,pef2256.yaml | 214 ++++++++++++++++++ > 1 file changed, 214 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..c4f21678bf6a > --- /dev/null > +++ b/Documentation/devicetree/bindings/net/lantiq,pef2256.yaml > @@ -0,0 +1,214 @@ > +# 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@xxxxxxxxxxx> > + > +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 My OCD is rather upset by the inconsistent capitalisation used here :/ > + - 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: > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [2048000, 4096000, 8192000, 16384000] -kBps is a standard suffix, would it be worth using that instead here? What you have would fit as even multiples. Otherwise Rob, should dt-schema grow -bps as a standard suffix? > + 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: > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1, 2, 3, 4, 5, 6, 7] > + default: 0 > + description: | > + The pef2256 delivers a full frame (32 8bit time-slots in E1 and 24 8bit Just a wee nit, s/8bit/8-bit/ :) Rest of this I don't really feel like I can really review. Thanks, Conor. > + time-slots 8 8bit signaling in E1/J1) every 125us. This lead to a data > + rate of 2048000 bit/s. When lantiq,data-rate-bps is more than 2048000 > + bit/s, the data (all 32 8bit) present in the frame are interleave with > + unused time-slots. The lantiq,channel-phase property allows to set the > + correct alignment of the interleave mechanism. > + For instance, suppose lantiq,data-rate-bps = 8192000 (ie 4*2048000), and > + lantiq,channel-phase = 2, the interleave schema with unused time-slots > + (nu) and used time-slots (XX) for TSi is > + nu nu XX nu nu nu XX nu nu nu XX nu > + <-- TSi --> <- TSi+1 -> <- TSi+2 -> > + With lantiq,data-rate-bps = 8192000, and lantiq,channel-phase = 1, the > + interleave schema is > + nu XX nu nu nu XX nu nu nu XX nu nu > + <-- TSi --> <- TSi+1 -> <- TSi+2 -> > + With lantiq,data-rate-bps = 4096000 (ie 2*2048000), and > + lantiq,channel-phase = 1, the interleave schema is > + nu XX nu XX nu XX > + <-- TSi --> <- TSi+1 -> <- TSi+2 -> > + > +patternProperties: > + '^codec(-([0-9]|[1-2][0-9]|3[0-1]))?$': > + 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 > + > + 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>; > + }; > + }; > + }; > -- > 2.41.0 >
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