arm64: renesas: salvator-x: Sound SSI PIO support

This patch adds PIO sound support for Salvator-X board.
It can use 44.1kHz base sound only at this point, since 48kHz base
sound needs CS2000, but it is not yet upstreamed.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index d829fdae3c56953b86f7c939633d58aa3929d5ff..90ca7faa629c762cab6d706d23551d3ba9f80a7c 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -31,6 +31,28 @@
                /* first 128MB is reserved for secure area. */
                reg = <0x0 0x48000000 0x0 0x38000000>;
        };
+
+       x12_clk: x12_clk {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <24576000>;
+       };
+
+       rsnd_ak4613: sound {
+               compatible = "simple-audio-card";
+
+               simple-audio-card,format = "left_j";
+               simple-audio-card,bitclock-master = <&sndcpu>;
+               simple-audio-card,frame-master = <&sndcpu>;
+
+               sndcpu: simple-audio-card,cpu {
+                       sound-dai = <&rcar_sound>;
+               };
+
+               sndcodec: simple-audio-card,codec {
+                       sound-dai = <&ak4613>;
+               };
+       };
 };
 
 &extal_clk {
@@ -56,6 +78,17 @@
                renesas,groups = "avb_mdc";
                renesas,function = "avb";
        };
+
+       sound_pins: sound {
+               renesas,groups = "ssi01239_ctrl", "ssi0_data", "ssi1_data_a";
+               renesas,function = "ssi";
+       };
+
+       sound_clk_pins: sound_clk {
+               renesas,groups = "audio_clk_a_a", "audio_clk_b_a", "audio_clk_c_a",
+                                "audio_clkout_a", "audio_clkout3_a";
+               renesas,function = "audio_clk";
+       };
 };
 
 &scif1 {
@@ -77,6 +110,49 @@
        pinctrl-names = "default";
 
        status = "okay";
+
+       clock-frequency = <100000>;
+
+       ak4613: codec@10 {
+               compatible = "asahi-kasei,ak4613";
+               #sound-dai-cells = <0>;
+               reg = <0x10>;
+               clocks = <&rcar_sound 3>;
+       };
+};
+
+&rcar_sound {
+       pinctrl-0 = <&sound_pins &sound_clk_pins>;
+       pinctrl-names = "default";
+
+       /* Single DAI */
+       #sound-dai-cells = <0>;
+
+       /* audio_clkout0/1/2/3 */
+       #clock-cells = <1>;
+       clock-frequency = <11289600>;
+
+       status = "okay";
+
+       rcar_sound,dai {
+               dai0 {
+                       playback = <&ssi0>;
+                       capture  = <&ssi1>;
+               };
+       };
+};
+
+&ssi0 {
+       pio-transfer;
+};
+
+&ssi1 {
+       pio-transfer;
+       shared-pin;
+};
+
+&audio_clk_a {
+       clock-frequency = <22579200>;
 };
 
 &avb {