From 2f0a632db0b52321f1fc3623d088a741aeb72ef7 Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Date: Sun, 4 Jul 2021 16:28:16 +0300
Subject: [PATCH] HACK: panda-es: S/PDIF support

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
---
 arch/arm/boot/dts/omap4-panda-common.dtsi | 21 ----------
 arch/arm/boot/dts/omap4-panda-es.dts      | 51 ++++++++++++++++++++---
 2 files changed, 45 insertions(+), 27 deletions(-)

diff --git a/arch/arm/boot/dts/omap4-panda-common.dtsi b/arch/arm/boot/dts/omap4-panda-common.dtsi
index 609a8dea946b3..78a45a2573b44 100644
--- a/arch/arm/boot/dts/omap4-panda-common.dtsi
+++ b/arch/arm/boot/dts/omap4-panda-common.dtsi
@@ -62,21 +62,6 @@
 		};
 	};
 
-	gpio_keys: gpio_keys {
-		compatible = "gpio-keys";
-		pinctrl-names = "default";
-		pinctrl-0 = <
-			&button_pins
-		>;
-
-		buttonS2 {
-			label = "button S2";
-			gpios = <&gpio4 25 GPIO_ACTIVE_LOW>;	/* gpio_121 */
-			linux,code = <BTN_0>;
-			wakeup-source;
-		};
-	};
-
 	sound: sound {
 		compatible = "ti,abe-twl6040";
 		ti,model = "PandaBoard";
@@ -381,12 +366,6 @@
 			OMAP4_IOPAD(0x152, PIN_INPUT_PULLUP | MUX_MODE0)	/* sdmmc5_dat3.sdmmc5_dat3 */
 		>;
 	};
-
-	button_pins: pinmux_button_pins {
-		pinctrl-single,pins = <
-			OMAP4_IOPAD(0x114, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpio_121 */
-		>;
-	};
 };
 
 &omap4_pmx_wkup {
diff --git a/arch/arm/boot/dts/omap4-panda-es.dts b/arch/arm/boot/dts/omap4-panda-es.dts
index 7c6886cd738f0..e4e8b100d02ae 100644
--- a/arch/arm/boot/dts/omap4-panda-es.dts
+++ b/arch/arm/boot/dts/omap4-panda-es.dts
@@ -6,10 +6,41 @@
 
 #include "omap4460.dtsi"
 #include "omap4-panda-common.dtsi"
+#include <dt-bindings/sound/ti-mcasp.h>
 
 / {
 	model = "TI OMAP4 PandaBoard-ES";
 	compatible = "ti,omap4-panda-es", "ti,omap4-panda", "ti,omap4460", "ti,omap4430", "ti,omap4";
+
+	dummy_codec0: dummy_codec@0 {
+		compatible = "linux,snd-soc-dummy";
+		#sound-dai-cells = <0>;
+	};
+
+	spdif_out: spdif-out {
+		#sound-dai-cells = <0>;
+		compatible = "linux,spdif-dit";
+	};
+
+	sound3: sound@3 {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "omap4-spdif";
+		simple-audio-card,format = "dsp_b";
+		simple-audio-card,bitclock-master = <&sound3_master>;
+		simple-audio-card,frame-master = <&sound3_master>;
+
+		status = "okay";
+
+		sound3_master: simple-audio-card,cpu {
+			sound-dai = <&mcasp0>;
+			clocks = <&abe_clkctrl OMAP4_MCASP_CLKCTRL 0>;
+			system-clock-id = <MCASP_CLK_HCLK_AUXCLK>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&spdif_out>;
+		};
+	};
 };
 
 /* Audio routing is differnet between PandaBoard4430 and PandaBoardES */
@@ -65,6 +96,12 @@
 			OMAP4_IOPAD(0x11e, PIN_OUTPUT | MUX_MODE0)		/* uart2_tx.uart2_tx */
 		>;
 	};
+
+	mcasp_pins: mcasp_pins {
+		pinctrl-single,pins = <
+			OMAP4_IOPAD(0x114, PIN_OUTPUT | MUX_MODE2) /* abe_dmic_din2.abe_mcasp_axr */
+		>;
+	};
 };
 
 &led_wkgpio_pins {
@@ -87,12 +124,6 @@
 	};
 };
 
-&gpio_keys {
-	buttonS2 {
-		gpios = <&gpio4 17 GPIO_ACTIVE_LOW>; /* gpio_113 */
-	};
-};
-
 &gpio1_target {
 	 ti,no-reset-on-init;
 };
@@ -112,3 +143,11 @@
 		enable-gpios = <&gpio2 14 GPIO_ACTIVE_HIGH>;	/* GPIO_46 */
 	};
 };
+
+&mcasp0 {
+	#sound-dai-cells = <0>;
+	status = "okay";
+
+	pinctrl-0 = <&mcasp_pins>;
+	pinctrl-names = "default";
+};