[PATCH 11/11] [EXAMPLE] arm64: dts: allwinner: a527-cubie-a5e: Enable I2S and SPDIF output
From: Chen-Yu Tsai <wens@kernel.org>
Date: 2025-10-20 17:11:23
Also in:
dmaengine, linux-clk, linux-devicetree, linux-sound, linux-sunxi, lkml
Subsystem:
arm/allwinner sunxi soc support, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Torvalds
This is an example change. The Radxa Cubie A5E exposes I2S2 and SPDIF on the 40-pin header. Enable both. In this example, I2S2 is connected to adafruit speaker bonnet, which sports a pair of MAX98357A for speaker amplication. SPDIF is connected to a SPDIF interface card for PCs, which has both coaxial and optical outputs. The output was connected via optical cable to a dumb SPDIF to analog audio converter. Signed-off-by: Chen-Yu Tsai <wens@kernel.org> --- .../dts/allwinner/sun55i-a527-cubie-a5e.dts | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+)
diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a527-cubie-a5e.dts b/arch/arm64/boot/dts/allwinner/sun55i-a527-cubie-a5e.dts
index bfdf1728cd14..828d101d28e8 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-a527-cubie-a5e.dts
+++ b/arch/arm64/boot/dts/allwinner/sun55i-a527-cubie-a5e.dts@@ -64,6 +64,46 @@ reg_usb_vbus: vbus { gpio = <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */ enable-active-high; }; + + codec: audio-codec { + compatible = "maxim,max98360a"; + #sound-dai-cells = <0>; + }; + + sound-i2s { + compatible = "simple-audio-card"; + simple-audio-card,name = "I2S"; + simple-audio-card,format = "left_j"; + simple-audio-card,bitclock-master = <&dailink_cpu>; + simple-audio-card,frame-master = <&dailink_cpu>; + simple-audio-card,mclk-fs = <128>; + + dailink_cpu: simple-audio-card,cpu { + sound-dai = <&i2s2>; + }; + + dailink0_master: simple-audio-card,codec { + sound-dai = <&codec>; + }; + }; + + sound-spdif { + compatible = "simple-audio-card"; + simple-audio-card,name = "spdif-out"; + + simple-audio-card,cpu { + sound-dai = <&spdif>; + }; + + simple-audio-card,codec { + sound-dai = <&spdif_out>; + }; + }; + + spdif_out: spdif-out { + #sound-dai-cells = <0>; + compatible = "linux,spdif-dit"; + }; }; &ehci0 {
@@ -101,6 +141,12 @@ &gpu { status = "okay"; }; +&i2s2 { + pinctrl-names = "default"; + pinctrl-0 = <&i2s2_pi_pins>; + status = "okay"; +}; + &mdio0 { ext_rgmii0_phy: ethernet-phy@1 { compatible = "ethernet-phy-ieee802.3-c22";
@@ -344,6 +390,12 @@ &r_pio { vcc-pm-supply = <®_aldo3>; }; +&spdif { + pinctrl-names = "default"; + pinctrl-0 = <&spdif_out_pi_pin>; + status = "okay"; +}; + &uart0 { pinctrl-names = "default"; pinctrl-0 = <&uart0_pb_pins>;
--
2.47.3