brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 135 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0303-BCM270X-Adding-device-tree-support-for-AudioSense-Pi.patch b/target/linux/brcm2708/patches-4.19/950-0303-BCM270X-Adding-device-tree-support-for-AudioSense-Pi.patch
new file mode 100644
index 0000000000..666da86998
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0303-BCM270X-Adding-device-tree-support-for-AudioSense-Pi.patch
@@ -0,0 +1,135 @@
+From 43f0013d9050a0011c05370c9b6123eb059f235b Mon Sep 17 00:00:00 2001
+From: b-ak <anur.bhargav@gmail.com>
+Date: Thu, 3 Jan 2019 00:29:14 +0530
+Subject: [PATCH 303/703] BCM270X: Adding device tree support for AudioSense-Pi
+ add-on soundcard
+
+Device tree overlay for AudioSense-Pi card.
+
+To enable support for the hardware add the following
+line to the RPi /boot/config.txt:
+
+	dtoverlay=audiosense-pi
+
+More documentation @ arch/arm/boot/dts/overlays/README
+
+Signed-off-by: b-ak <anur.bhargav@gmail.com>
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             |  8 ++
+ .../dts/overlays/audiosense-pi-overlay.dts    | 82 +++++++++++++++++++
+ 3 files changed, 91 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -20,6 +20,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ 	audioinjector-addons.dtbo \
+ 	audioinjector-ultra.dtbo \
+ 	audioinjector-wm8731-audio.dtbo \
++	audiosense-pi.dtbo \
+ 	audremap.dtbo \
+ 	balena-fin.dtbo \
+ 	bmp085_i2c-sensor.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -453,6 +453,14 @@ Load:   dtoverlay=audioinjector-wm8731-a
+ Params: <None>
+ 
+ 
++Name:   audiosense-pi
++Info:   Configures the audiosense-pi add on soundcard
++        For more information refer to
++        https://gitlab.com/kakar0t/audiosense-pi
++Load:   dtoverlay=audiosense-pi
++Params: <None>
++
++
+ Name:   audremap
+ Info:   Switches PWM sound output to pins 12 (Right) & 13 (Left)
+ Load:   dtoverlay=audremap,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts
+@@ -0,0 +1,82 @@
++// Definitions for audiosense add on soundcard
++/dts-v1/;
++/plugin/;
++#include <dt-bindings/pinctrl/bcm2835.h>
++#include <dt-bindings/gpio/gpio.h>
++
++/ {
++	compatible = "brcm,bcm2837", "brcm,bcm2836", "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
++
++	fragment@0 {
++		target = <&i2s>;
++		__overlay__ {
++			status = "okay";
++		};
++	};
++
++	fragment@1 {
++		target-path = "/";
++		__overlay__ {
++			codec_reg_1v8: codec-reg-1v8 {
++				compatible = "regulator-fixed";
++				regulator-name = "tlv320aic3204_1v8";
++				regulator-min-microvolt = <1800000>;
++				regulator-max-microvolt = <1800000>;
++				regulator-always-on;
++			};
++		};
++	};
++
++	fragment@2 {
++		target = <&gpio>;
++		__overlay__ {
++			codec_rst: codec-rst {
++				brcm,pins = <26>;
++				brcm,function = <BCM2835_FSEL_GPIO_OUT>;
++			};
++		};
++	};
++
++	fragment@3 {
++		target = <&i2c1>;
++		__overlay__ {
++			#address-cells = <1>;
++			#size-cells = <0>;
++			status = "okay";
++
++			/* audio external oscillator */
++			codec_osc: codec_osc {
++				compatible = "fixed-clock";
++				#clock-cells = <0>;
++				clock-frequency = <12000000>;	/* 12 MHz */
++			};
++
++			codec: tlv320aic32x4@18 {
++				#sound-dai-cells = <0>;
++				compatible = "ti,tlv320aic32x4";
++				reg = <0x18>;
++
++				clocks = <&codec_osc>;
++				clock-names = "mclk";
++
++				iov-supply = <&vdd_3v3_reg>;
++				ldoin-supply = <&vdd_3v3_reg>;
++
++				gpio-controller;
++				#gpio-cells = <2>;
++				reset-gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;
++
++				status = "okay";
++			};
++		};
++	};
++
++	fragment@4 {
++		target = <&sound>;
++		__overlay__ {
++			compatible = "as,audiosense-pi";
++			i2s-controller = <&i2s>;
++			status = "okay";
++		};
++	};
++};