ASoC: cygnus: Add DT bindings for Broadcom Cygnus audio

Add bindings for audio driver in Broadcom Cygnus.

Signed-off-by: Lori Hikichi <lhikichi@broadcom.com>
Signed-off-by: Simran Rai <ssimran@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt b/Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt
new file mode 100644 (file)
index 0000000..b139e66
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt
@@ -0,0 +1,67 @@
+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>;
+                       status = "okay";
+               };
+
+               ssp1: ssp_port@1 {
+                       reg = <1>;
+                       status = "disabled";
+               };
+
+               ssp2: ssp_port@2 {
+                       reg = <2>;
+                       status = "disabled";
+               };
+
+               spdif: spdif_port@3 {
+                       reg = <3>;
+                       status = "disabled";
+               };
+       };