linux-kernel - [PATCH 2/9] arm64: dts: exynosautov920: add abox

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Message-Id: <20250721023052.3586000-3-ew.kim@samsung.com>
Date: Mon, 21 Jul 2025 11:30:45 +0900
From: ew kim <ew.kim@...sung.com>
To: broonie@...nel.org, s.nawrocki@...sung.com, robh@...nel.org,
	krzk+dt@...nel.org
Cc: lgirdwood@...il.com, tiwai@...e.com, perex@...ex.cz,
	conor+dt@...nel.org, alim.akhtar@...sung.com, linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, ew kim
	<ew.kim@...sung.com>
Subject: [PATCH 2/9] arm64: dts: exynosautov920: add abox_generic dt node

Add device tree node for the abox_generic platform driver to enable
its registration as a platform device. This node does not represent
direct hardware resources but is necessary for driver initialization
and platform device binding.

Properties added in the device tree node:

- samsung,num-pcm-playback (uint32):
  Maximum number of supported PCM playback devices.
  Here, PCM playback devices refer to ALSA PCM devices.

- samsung,num-pcm-capture (uint32):
  Maximum number of supported PCM capture devices.
  Here, PCM capture devices refer to ALSA PCM devices.

- samsung,num-i2s-dummy-backend (uint32):
  Maximum number of supported I2S dummy backend devices.

The node is declared disabled by default in the main device tree source,
and enabled via board-specific DTS overlays by setting status = "okay".

This device tree binding document will be added under
Documentation/devicetree/bindings/sound/samsung,exynosauto.yaml

to describe the node properties and usage.

Signed-off-by: ew kim <ew.kim@...sung.com>
---
 arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts |  4 ++++
 arch/arm64/boot/dts/exynos/exynosautov920.dtsi     | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts b/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
index a397f068ed53..a870c0b6847f 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
+++ b/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
@@ -86,3 +86,7 @@ &usi_0 {
 &xtcxo {
 	clock-frequency = <38400000>;
 };
+
+&abox_generic {
+	status = "okay";
+};
\ No newline at end of file
diff --git a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
index 2cb8041c8a9f..4f086a7a79c8 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
@@ -1126,6 +1126,16 @@ timer {
 			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>,
 			     <GIC_PPI 12 IRQ_TYPE_LEVEL_LOW>;
 	};
+
+	abox_generic: abox_generic {
+		compatible = "samsung,abox_generic";
+		samsung,num-pcm-playback = <32>;
+		samsung,num-pcm-capture = <32>;
+		samsung,num-i2s-dummy-backend = <5>;
+		status = "disabled";
+		#address-cells = <2>;
+		#size-cells = <1>;
+	};
 };
 
 #include "exynosautov920-pinctrl.dtsi"
-- 
2.25.1