From 98f993e9d2b66f3219ac9841ad836ef79a341908 Mon Sep 17 00:00:00 2001
From: RF William Hollender <whollender@gmail.com>
Date: Sun, 18 Feb 2018 14:41:43 -0600
Subject: [PATCH 219/454] Add support for SuperAudioBoard sound card (#2386)

SuperAudioBoard support using simple-audio-card driver.
---
 arch/arm/boot/dts/overlays/Makefile           |  1 +
 arch/arm/boot/dts/overlays/README             |  6 ++
 .../dts/overlays/superaudioboard-overlay.dts  | 73 +++++++++++++++++++
 arch/arm/configs/bcm2709_defconfig            |  1 +
 arch/arm/configs/bcmrpi_defconfig             |  1 +
 arch/arm64/configs/bcmrpi3_defconfig          |  1 +
 6 files changed, 83 insertions(+)
 create mode 100755 arch/arm/boot/dts/overlays/superaudioboard-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -118,6 +118,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	spi2-1cs.dtbo \
 	spi2-2cs.dtbo \
 	spi2-3cs.dtbo \
+	superaudioboard.dtbo \
 	tinylcd35.dtbo \
 	uart0.dtbo \
 	uart1.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1658,6 +1658,12 @@ Params: cs0_pin                 GPIO pin
                                 is 'okay' or enabled).
 
 
+Name:   superaudioboard
+Info:   Configures the SuperAudioBoard sound card
+Load:   dtoverlay=superaudioboard,<param>=<val>
+Params: gpiopin                 GPIO pin for codec reset
+
+
 Name:   tinylcd35
 Info:   3.5" Color TFT Display by www.tinylcd.com
         Options: Touch, RTC, keypad
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/superaudioboard-overlay.dts
@@ -0,0 +1,73 @@
+// Definitions for SuperAudioBoard
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "simple-audio-card";
+			i2s-controller = <&i2s>;
+			status = "okay";
+
+			simple-audio-card,name = "SuperAudioBoard";
+
+			simple-audio-card,widgets =
+				"Line", "Line In",
+				"Line", "Line Out";
+
+			simple-audio-card,routing =
+				"Line Out","AOUTA+",
+				"Line Out","AOUTA-",
+				"Line Out","AOUTB+",
+				"Line Out","AOUTB-",
+				"AINA","Line In",
+				"AINB","Line In";
+
+			simple-audio-card,format = "i2s";
+
+			simple-audio-card,bitclock-master = <&sound_master>;
+			simple-audio-card,frame-master = <&sound_master>;
+
+			simple-audio-card,cpu {
+				sound-dai = <&i2s>;
+				dai-tdm-slot-num = <2>;
+				dai-tdm-slot-width = <32>;
+			};
+
+			sound_master: simple-audio-card,codec {
+				sound-dai = <&cs4271>;
+				system-clock-frequency = <24576000>;
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+    
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			cs4271: cs4271@10 {
+				#sound-dai-cells = <0>;
+				compatible = "cirrus,cs4271";
+				reg = <0x10>;
+				status = "okay";
+				reset-gpio = <&gpio 26 0>; /* Pin 26, active high */
+			};
+		};
+	};
+	__overrides__ {
+		gpiopin = <&cs4271>,"reset-gpio:4";
+	};
+};
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -895,6 +895,7 @@ CONFIG_SND_PISOUND=m
 CONFIG_SND_SOC_ADAU1701=m
 CONFIG_SND_SOC_ADAU7002=m
 CONFIG_SND_SOC_AK4554=m
+CONFIG_SND_SOC_CS4271_I2C=m
 CONFIG_SND_SOC_SPDIF=m
 CONFIG_SND_SOC_WM8804_I2C=m
 CONFIG_SND_SIMPLE_CARD=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -888,6 +888,7 @@ CONFIG_SND_PISOUND=m
 CONFIG_SND_SOC_ADAU1701=m
 CONFIG_SND_SOC_ADAU7002=m
 CONFIG_SND_SOC_AK4554=m
+CONFIG_SND_SOC_CS4271_I2C=m
 CONFIG_SND_SOC_SPDIF=m
 CONFIG_SND_SOC_WM8804_I2C=m
 CONFIG_SND_SIMPLE_CARD=m
--- a/arch/arm64/configs/bcmrpi3_defconfig
+++ b/arch/arm64/configs/bcmrpi3_defconfig
@@ -870,6 +870,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_SOC_ADAU1701=m
 CONFIG_SND_SOC_AK4554=m
+CONFIG_SND_SOC_CS4271_I2C=m
 CONFIG_SND_SOC_WM8804_I2C=m
 CONFIG_SND_SIMPLE_CARD=m
 CONFIG_SOUND_PRIME=m