linux-kernel - [PATCH v2 3/4] arm64: dts: qcom: qcm2290: add LPASS LPI pin controller

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Message-Id: <20251007-rb1_hdmi_audio-v2-3-821b6a705e4c@linaro.org>
Date: Tue, 07 Oct 2025 03:03:31 +0100
From: Alexey Klimov <alexey.klimov@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
 Srinivas Kandagatla <srini@...nel.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, 
 linux-arm-msm@...r.kernel.org, linux-gpio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-sound@...r.kernel.org, Alexey Klimov <alexey.klimov@...aro.org>
Subject: [PATCH v2 3/4] arm64: dts: qcom: qcm2290: add LPASS LPI pin
 controller

Add the Low Power Audio SubSystem Low Power Island (LPASS LPI) pin
controller device node required for audio subsystem on Qualcomm
QRB2210 RB1. QRB2210 is based on qcm2290 which is based on sm6115.

While at this, also add description of lpi_i2s2 pins (active state)
required for audio playback via HDMI/I2S.

Cc: Srinivas Kandagatla <srini@...nel.org>
Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
---
 arch/arm64/boot/dts/qcom/qcm2290.dtsi | 41 +++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcm2290.dtsi b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
index 7303aff33814f256a2ea09a71a640db466370eff..02eee364e618358e5ead78c2b97fde12a57ede0a 100644
--- a/arch/arm64/boot/dts/qcom/qcm2290.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
@@ -19,6 +19,7 @@
 #include <dt-bindings/power/qcom-rpmpd.h>
 #include <dt-bindings/soc/qcom,apr.h>
 #include <dt-bindings/sound/qcom,q6asm.h>
+#include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h>
 
 / {
 	interrupt-parent = <&intc>;
@@ -673,6 +674,46 @@ data-pins {
 			};
 		};
 
+		lpass_tlmm: pinctrl@...0000 {
+			compatible = "qcom,qcm2290-lpass-lpi-pinctrl",
+				     "qcom,sm6115-lpass-lpi-pinctrl";
+			reg = <0x0 0x0a7c0000 0x0 0x20000>,
+			      <0x0 0x0a950000 0x0 0x10000>;
+
+			clocks = <&q6afecc LPASS_HW_DCODEC_VOTE LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
+			clock-names = "audio";
+
+			gpio-controller;
+			#gpio-cells = <2>;
+			gpio-ranges = <&lpass_tlmm 0 0 19>;
+
+			lpi_i2s2_active: lpi-i2s2-active-state {
+				data-pins {
+					pins = "gpio12";
+					function = "i2s2_data";
+					bias-disable;
+					drive-strength = <8>;
+					output-high;
+				};
+
+				sck-pins {
+					pins = "gpio10";
+					function = "i2s2_clk";
+					bias-disable;
+					drive-strength = <8>;
+					output-high;
+				};
+
+				ws-pins {
+					pins = "gpio11";
+					function = "i2s2_ws";
+					bias-disable;
+					drive-strength = <8>;
+					output-high;
+				};
+			};
+		};
+
 		gcc: clock-controller@...0000 {
 			compatible = "qcom,gcc-qcm2290";
 			reg = <0x0 0x01400000 0x0 0x1f0000>;

-- 
2.47.3