Adding pisound-micro-overlay.dts

Signed-off-by: Giedrius Trainavičius <giedrius@blokas.io>

Author: gtrainavicius

arch/arm/boot/dts/overlays/Makefile

@@ -213,6 +213,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	piscreen.dtbo \
 	piscreen2r.dtbo \
 	pisound.dtbo \
+	pisound-micro.dtbo \
 	pisound-pi5.dtbo \
 	pitft22.dtbo \
 	pitft28-capacitive.dtbo \

arch/arm/boot/dts/overlays/README

@@ -3863,6 +3863,21 @@ Load:   dtoverlay=pisound
 Params: <None>
 
 
+Name:   pisound-micro
+Info:   Configures the Blokas Labs Pisound Micro card
+Load:   dtoverlay=pisound-micro,<param>=<val>
+Params: input-mode              'differential' (default) or 'single-ended'.
+                                Configures the input pin mode.
+        hp-out-mode             'capless-headphone' (default), 'headphone' or
+                                'line-out'. Configures the HP output mode.
+        line-out-mode           'line-out' (default) or 'headphone'. Configures
+                                the LINE_OUT pins for different impedances.
+        mono-out-mode           'line-out' (default) or 'headphone'. Configures
+                                the MONO_OUT pin mode for different impedances.
+                                Only available when hp-out-mode is not
+                                'capless-headphone'.
+
+
 Name:   pisound-pi5
 Info:   Pi 5 specific overlay override for Blokas Labs Pisound card, see pisound
 Load:   dtoverlay=pisound-pi5

arch/arm/boot/dts/overlays/pisound-micro-overlay.dts

@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Pisound Micro Linux kernel module.
+ * Copyright (C) 2017-2025  Vilniaus Blokas UAB, https://blokas.io/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/bcm2835.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&gpio>;
+		__overlay__ {
+			pisound_micro_pins: pisound_micro_pins {
+				brcm,pins = <16 26>;
+				brcm,function = <BCM2835_FSEL_GPIO_IN BCM2835_FSEL_GPIO_IN>;
+				brcm,pull = <BCM2835_PUD_UP BCM2835_PUD_UP>;
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/";
+		__overlay__ {
+			clk_codec: clk-codec {
+				compatible = "fixed-clock";
+				#clock-cells = <0>;
+				clock-frequency = <12000000>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c_arm>;
+		__overlay__ {
+			status = "okay";
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			pisound_micro_ctrl: pisound_micro_ctrl@12 {
+				compatible = "blokas,upisnd-ctrl";
+
+				pinctrl-names = "default";
+				pinctrl-0 = <&pisound_micro_pins>;
+
+				reg = <0x12>;
+				status = "okay";
+
+				interrupt-parent = <&gpio>;
+				interrupt-controller;
+				interrupts = <26 IRQ_TYPE_LEVEL_LOW>;
+				interrupt-names = "data_available";
+
+				gpio-controller;
+				#gpio-cells = <2>;
+
+				data_available-gpios = <&gpio 26 GPIO_ACTIVE_LOW>;
+				reset-gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+			};
+
+			pisound_micro_codec: upisnd_codec@3b {
+				#sound-dai-cells = <0>;
+				compatible = "blokas,upisnd-codec";
+				reg = <0x3b>;
+
+				clock-names = "mclk";
+				clocks = <&clk_codec>;
+
+				// Additional options with default values and alternative values:
+
+				//input-mode    = "differential"; // Or "single-ended"
+
+				//hp-out-mode   = "headphone";    // Or "capless-headphone"
+								  // Or "line-out"
+
+				//line-out-mode = "line-out";     // Or "headphone"
+				//mono-out-mode = "line-out";     // Or "headphone"
+
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@3 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "blokas,pisound-micro";
+			codec = <&pisound_micro_codec>;
+			ctrl = <&pisound_micro_ctrl>;
+			i2s-controller = <&i2s_clk_consumer>;
+			status = "okay";
+		};
+	};
+
+	fragment@4 {
+		target = <&i2s_clk_consumer>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	__overrides__ {
+		input-mode=<&pisound_micro_codec>,"input-mode{single-ended,differential}";
+		hp-out-mode=<&pisound_micro_codec>,
+			"hp-out-mode{capless-headphone,headphone,line-out}";
+		line-out-mode=<&pisound_micro_codec>,"line-out-mode{line-out,headphone}";
+		mono-out-mode=<&pisound_micro_codec>,"mono-out-mode{line-out,headphone}";
+	};
+
+	__exports__ {
+		pisound_micro_ctrl;
+	};
+};
+
+/* vim: set ts=8 sw=8 noexpandtab: */