Kernel-4.18.0-80.el8_brcm,cygnus-audio

BROADCOM Cygnus Audio I2S/TDM/SPDIF controller

Required properties:
- compatible : “brcm,cygnus-audio”
- #address-cells: 32bit valued, 1 cell.
- #size-cells: 32bit valued, 0 cell.
- reg : Should contain audio registers location and length
- reg-names: names of the registers listed in “reg” property
Valid names are “aud” and “i2s_in”. “aud” contains a
set of DMA, I2S_OUT and SPDIF registers. “i2s_in” contains
a set of I2S_IN registers.
- clocks: PLL and leaf clocks used by audio ports
- assigned-clocks: PLL and leaf clocks
- assigned-clock-parents: parent clocks of the assigned clocks
(usually the PLL)
- assigned-clock-rates: List of clock frequencies of the
assigned clocks
- clock-names: names of 3 leaf clocks used by audio ports
Valid names are “ch0_audio”, “ch1_audio”, “ch2_audio”
- interrupts: audio DMA interrupt number

SSP Subnode properties:

• reg: The index of ssp port interface to use
  Valid value are 0, 1, 2, or 3 (for spdif)

Example:
cygnus_audio: audio@180ae000 {
compatible = “brcm,cygnus-audio”;
#address-cells = <1>;
#size-cells = <0>;
reg = <0x180ae000 0xafd>, <0x180aec00 0x1f8>;
reg-names = “aud”, “i2s_in”;
clocks = <&audiopll BCM_CYGNUS_AUDIOPLL_CH0>,
<&audiopll BCM_CYGNUS_AUDIOPLL_CH1>,
<&audiopll BCM_CYGNUS_AUDIOPLL_CH2>;
assigned-clocks = <&audiopll BCM_CYGNUS_AUDIOPLL>,
<&audiopll BCM_CYGNUS_AUDIOPLL_CH0>,
<&audiopll BCM_CYGNUS_AUDIOPLL_CH1>,
<&audiopll BCM_CYGNUS_AUDIOPLL_CH2>;
assigned-clock-parents = <&audiopll BCM_CYGNUS_AUDIOPLL>;
assigned-clock-rates = <1769470191>,
<0>,
<0>,
<0>;
clock-names = “ch0_audio”, “ch1_audio”, “ch2_audio”;
interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;

    ssp0: ssp_port@0 {
        reg = <0>;
    };

    ssp1: ssp_port@1 {
        reg = <1>;
    };

    ssp2: ssp_port@2 {
        reg = <2>;
    };

    spdif: spdif_port@3 {
        reg = <3>;
    };
};