From d4ccbc564084ec5a5082a5b0a58c6d0d66f5358a 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 238/277] 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 ++
 .../boot/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

diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index 3c8222020562..a4c5b740bf74 100644
--- 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 \
diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index dadbccc18f45..65a93e655575 100644
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1658,6 +1658,12 @@ Params: cs0_pin                 GPIO pin for CS0 (default 43 - BCM SPI2_CE0).
                                 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
diff --git a/arch/arm/boot/dts/overlays/superaudioboard-overlay.dts b/arch/arm/boot/dts/overlays/superaudioboard-overlay.dts
new file mode 100755
index 000000000000..e625faeed7fb
--- /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";
+	};
+};
diff --git a/arch/arm/configs/bcm2709_defconfig b/arch/arm/configs/bcm2709_defconfig
index 766e1d12436d..29915443fce6 100644
--- 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
diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
index 4e92a1107513..7af3dd3cc385 100644
--- 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
diff --git a/arch/arm64/configs/bcmrpi3_defconfig b/arch/arm64/configs/bcmrpi3_defconfig
index 003209bf2362..1352f5d343e0 100644
--- a/arch/arm64/configs/bcmrpi3_defconfig
+++ b/arch/arm64/configs/bcmrpi3_defconfig
@@ -872,6 +872,7 @@ 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
-- 
2.16.1