porter: kernel: migrate porter board audio from platform data to DTS

Kernel BSP v1.9.0 contained a backported ASoC and dma descriptor mode driver for AUDIO-DMAC from the upstream kernel.
This patch series migrates the R-Car M2 Porter board audio from platform data to DTS to make use of this driver and
restore audio on the board.

1 files changed, 104 insertions, 0 deletions

diff --git a/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0002-ARM-shmobile-porter-Sound-PIO-support-on-DTS.patch b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0002-ARM-shmobile-porter-Sound-PIO-support-on-DTS.patch
new file mode 100644
index 0000000..2d46e32
--- /dev/null
+++ b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0002-ARM-shmobile-porter-Sound-PIO-support-on-DTS.patch
@@ -0,0 +1,104 @@
+From cf4fa13cdad142f1d1bdf1485cc941140062e1ce Mon Sep 17 00:00:00 2001
+From: Biju Das <biju.das@bp.renesas.com>
+Date: Thu, 2 Apr 2015 13:46:13 +0100
+Subject: [PATCH 2/7] ARM: shmobile: porter: Sound PIO support on DTS
+
+This change is identical to the koelsch patch "ARM: shmobile: koelsch: Sound PIO support on DTS"
+from Kuninori Morimoto and backported to 3.10
+Signed-off-by: Biju Das <biju.das@bp.renesas.com>
+---
+ arch/arm/boot/dts/r8a7791-porter.dts |   52 ++++++++++++++++++++++++++++++----
+ 1 file changed, 46 insertions(+), 6 deletions(-)
+
+diff --git a/arch/arm/boot/dts/r8a7791-porter.dts b/arch/arm/boot/dts/r8a7791-porter.dts
+index 4fb5cd5..b39dc6a 100644
+--- a/arch/arm/boot/dts/r8a7791-porter.dts
++++ b/arch/arm/boot/dts/r8a7791-porter.dts
+@@ -12,11 +12,9 @@
+ /*
+  * SSI-AK4643
+  *
+- * these commands are required when playback.
++ * This command is required when Playback/Capture
+  *
+- * # amixer set "LINEOUT Mixer DACL" on
+- * # amixer set "Digital" 200
+- * # amixer set "DVC Out" 50
++ * amixer set "LINEOUT Mixer DACL" on
+  */
+ 
+ /dts-v1/;
+@@ -102,6 +100,23 @@
+ 			  1800000 0>;
+ 	};
+ 
++	sound {
++		compatible = "simple-audio-card";
++
++		simple-audio-card,format = "left_j";
++		simple-audio-card,bitclock-master = <&sndcodec>;
++		simple-audio-card,frame-master = <&sndcodec>;
++
++		sndcpu: simple-audio-card,cpu {
++			sound-dai = <&rcar_sound>;
++		};
++
++		sndcodec: simple-audio-card,codec {
++			sound-dai = <&ak4643>;
++			system-clock-frequency = <11289600>;
++		};
++	};
++
+ 	hdmi_transmitter: adv7511 {
+ 		compatible = "adi,adv7511";
+ 		gpios = <&gpio3 29 GPIO_ACTIVE_LOW>;
+@@ -128,7 +143,7 @@
+ };
+ 
+ &pfc {
+-	pinctrl-0 = <&du_pins &usb0_pins &usb1_pins &sound_pins &sound_clk_pins &vin0_pins>;
++	pinctrl-0 = <&du_pins &usb0_pins &usb1_pins &vin0_pins>;
+ 	pinctrl-names = "default";
+ 
+ 	du_pins: du {
+@@ -337,7 +352,7 @@
+ 		pagesize = <16>;
+ 	};
+ 
+-	snd_codec: ak4643 {
++	ak4643: sound-codec@12 {
+ 		#sound-dai-cells = <0>;
+ 		compatible = "asahi-kasei,ak4643";
+ 		reg = <0x12>;
+@@ -395,3 +410,28 @@
+ &cpu0 {
+ 	cpu0-supply = <&vdd_dvfs>;
+ };
++
++&rcar_sound {
++	pinctrl-0 = <&sound_pins &sound_clk_pins>;
++	pinctrl-names = "default";
++
++	#sound-dai-cells = <0>;
++
++	status = "okay";
++
++	rcar_sound,dai {
++		dai0 {
++			playback = <&ssi0>;
++			capture  = <&ssi1>;
++		};
++	};
++};
++
++&ssi0 {
++	pio-transfer;
++};
++
++&ssi1 {
++	pio-transfer;
++	shared-pin;
++};
+-- 
+1.7.9.5
+