brcm2708: update linux 4.4 patches to latest version

As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Also adds support for Raspberry Pi Compute Module 3 (untested).

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

1 files changed, 284 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch b/target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch
new file mode 100644
index 0000000000..c29bd86667
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch
@@ -0,0 +1,284 @@
+From ae776ef7eb34d99945aadbaa607e1aec66fd04d0 Mon Sep 17 00:00:00 2001
+From: Matt Flax <flatmax@flatmax.org>
+Date: Mon, 16 May 2016 21:36:31 +1000
+Subject: [PATCH] New AudioInjector.net Pi soundcard with low jitter audio in
+ and out.
+
+Contains the sound/soc/bcm ALSA machine driver and necessary alterations to the Kconfig and Makefile.
+Adds the dts overlay and updates the Makefile and README.
+Updates the relevant defconfig files to enable building for the Raspberry Pi.
+Thanks to Phil Elwell (pelwell) for the review, simple-card concepts and discussion. Thanks to Clive Messer for overlay naming suggestions.
+---
+ arch/arm/boot/dts/overlays/Makefile                |   1 +
+ arch/arm/boot/dts/overlays/README                  |   6 +
+ .../audioinjector-wm8731-audio-overlay.dts         |  39 ++++++
+ arch/arm/configs/bcm2709_defconfig                 |   1 +
+ arch/arm/configs/bcmrpi_defconfig                  |   1 +
+ sound/soc/bcm/Kconfig                              |   7 +
+ sound/soc/bcm/Makefile                             |   3 +
+ sound/soc/bcm/audioinjector-pi-soundcard.c         | 142 +++++++++++++++++++++
+ 8 files changed, 200 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
+ create mode 100644 sound/soc/bcm/audioinjector-pi-soundcard.c
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -16,6 +16,7 @@ dtbo-$(RPI_DT_OVERLAYS) += adau1977-adc.
+ dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
++dtbo-$(RPI_DT_OVERLAYS) += audioinjector-wm8731-audio.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += boomberry-dac.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += boomberry-digi.dtbo
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -225,6 +225,12 @@ Params: interrupt               GPIO use
+                                 arrays (0=+0pF, 15=+4.5pF, default 15)
+ 
+ 
++Name:   audioinjector-wm8731-audio
++Info:   Configures the audioinjector.net audio add on soundcard
++Load:   dtoverlay=audioinjector-wm8731-audio
++Params: <None>
++
++
+ Name:   bmp085_i2c-sensor
+ Info:   Configures the BMP085/BMP180 digital barometric pressure and temperature
+         sensors from Bosch Sensortec
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
+@@ -0,0 +1,39 @@
++// Definitions for audioinjector.net audio add on soundcard
++/dts-v1/;
++/plugin/;
++
++/ {
++	compatible = "brcm,bcm2708";
++
++	fragment@0 {
++		target = <&i2s>;
++		__overlay__ {
++			status = "okay";
++		};
++	};
++
++	fragment@1 {
++		target = <&i2c1>;
++		__overlay__ {
++			#address-cells = <1>;
++			#size-cells = <0>;
++			status = "okay";
++
++			wm8731@1a {
++				#sound-dai-cells = <0>;
++				compatible = "wlf,wm8731";
++				reg = <0x1a>;
++				status = "okay";
++			};
++		};
++	};
++
++	fragment@2 {
++		target = <&sound>;
++		__overlay__ {
++			compatible = "ai,audioinjector-pi-soundcard";
++			i2s-controller = <&i2s>;
++			status = "okay";
++		};
++	};
++};
+--- a/arch/arm/configs/bcm2709_defconfig
++++ b/arch/arm/configs/bcm2709_defconfig
+@@ -863,6 +863,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
+ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
+ CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
+ CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
++CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
+ CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
+ CONFIG_SND_SOC_ADAU1701=m
+ CONFIG_SND_SOC_WM8804_I2C=m
+--- a/arch/arm/configs/bcmrpi_defconfig
++++ b/arch/arm/configs/bcmrpi_defconfig
+@@ -855,6 +855,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
+ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
+ CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
+ CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
++CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
+ CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
+ CONFIG_SND_SOC_ADAU1701=m
+ CONFIG_SND_SOC_WM8804_I2C=m
+--- a/sound/soc/bcm/Kconfig
++++ b/sound/soc/bcm/Kconfig
+@@ -85,3 +85,10 @@ config SND_BCM2708_SOC_ADAU1977_ADC
+ 	select SND_SOC_ADAU1977_I2C
+ 	help
+ 	  Say Y or M if you want to add support for ADAU1977 ADC.
++
++config SND_AUDIOINJECTOR_PI_SOUNDCARD
++	tristate "Support for audioinjector.net Pi add on soundcard"
++	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
++	select SND_SOC_WM8731
++	help
++	  Say Y or M if you want to add support for audioinjector.net Pi Hat
+--- a/sound/soc/bcm/Makefile
++++ b/sound/soc/bcm/Makefile
+@@ -15,6 +15,7 @@ snd-soc-rpi-dac-objs := rpi-dac.o
+ snd-soc-rpi-proto-objs := rpi-proto.o
+ snd-soc-iqaudio-dac-objs := iqaudio-dac.o
+ snd-soc-raspidac3-objs := raspidac3.o
++snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
+ 
+ obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
+ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
+@@ -27,3 +28,5 @@ obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) +=
+ obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
+ obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
+ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
++obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
++
+--- /dev/null
++++ b/sound/soc/bcm/audioinjector-pi-soundcard.c
+@@ -0,0 +1,142 @@
++/*
++ * ASoC Driver for AudioInjector Pi add on soundcard
++ *
++ *  Created on: 13-May-2016
++ *      Author: flatmax@flatmax.org
++ *              based on code by  Cliff Cai <Cliff.Cai@analog.com> for the ssm2602 machine blackfin.
++ *              with help from Lars-Peter Clausen for simplifying the original code to use the dai_fmt field.
++ *		i2s_node code taken from the other sound/soc/bcm machine drivers.
++ *
++ * Copyright (C) 2016 Flatmax Pty. Ltd.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * version 2 as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
++ * General Public License for more details.
++ */
++
++#include <linux/module.h>
++#include <linux/types.h>
++
++#include <sound/core.h>
++#include <sound/soc.h>
++#include <sound/pcm_params.h>
++#include <sound/control.h>
++
++#include "../codecs/wm8731.h"
++
++static int audioinjector_pi_soundcard_dai_init(struct snd_soc_pcm_runtime *rtd)
++{
++	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
++
++	// not connected
++	snd_soc_dapm_nc_pin(dapm, "Mic Bias");
++	snd_soc_dapm_nc_pin(dapm, "MICIN");
++	snd_soc_dapm_nc_pin(dapm, "RHPOUT");
++	snd_soc_dapm_nc_pin(dapm, "LHPOUT");
++
++	return snd_soc_dai_set_sysclk(rtd->codec_dai, WM8731_SYSCLK_XTAL, 12000000, SND_SOC_CLOCK_IN);
++}
++
++static struct snd_soc_dai_link audioinjector_pi_soundcard_dai[] = {
++	{
++		.name = "AudioInjector audio",
++		.stream_name = "AudioInjector audio",
++		.cpu_dai_name	= "bcm2708-i2s.0",
++		.codec_dai_name = "wm8731-hifi",
++		.platform_name	= "bcm2835-i2s.0",
++		.codec_name = "wm8731.1-001a",
++		.init = audioinjector_pi_soundcard_dai_init,
++		.dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF,
++	},
++};
++
++static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
++	SND_SOC_DAPM_SPK("Ext Spk", NULL),
++	SND_SOC_DAPM_LINE("Line In Jacks", NULL),
++};
++
++/* Corgi machine connections to the codec pins */
++static const struct snd_soc_dapm_route audioinjector_audio_map[] = {
++	/* speaker connected to LOUT, ROUT */
++	{"Ext Spk", NULL, "ROUT"},
++	{"Ext Spk", NULL, "LOUT"},
++
++	/* line inputs */
++	{"Line In Jacks", NULL, "Line Input"},
++};
++
++static struct snd_soc_card snd_soc_audioinjector = {
++	.name = "audioinjector-pi-soundcard",
++	.dai_link = audioinjector_pi_soundcard_dai,
++	.num_links = 1,
++
++	.dapm_widgets = wm8731_dapm_widgets,
++	.num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
++	.dapm_routes = audioinjector_audio_map,
++	.num_dapm_routes = ARRAY_SIZE(audioinjector_audio_map),
++};
++
++static int audioinjector_pi_soundcard_probe(struct platform_device *pdev)
++{
++	struct snd_soc_card *card = &snd_soc_audioinjector;
++	int ret;
++	
++	card->dev = &pdev->dev;
++
++	if (pdev->dev.of_node) {
++		struct snd_soc_dai_link *dai = &audioinjector_pi_soundcard_dai[0];
++		struct device_node *i2s_node = of_parse_phandle(pdev->dev.of_node,
++								"i2s-controller", 0);
++
++		if (i2s_node) {
++			dai->cpu_dai_name = NULL;
++			dai->cpu_of_node = i2s_node;
++			dai->platform_name = NULL;
++			dai->platform_of_node = i2s_node;
++		} else
++			if (!dai->cpu_of_node) {
++				dev_err(&pdev->dev, "Property 'i2s-controller' missing or invalid\n");
++				return -EINVAL;
++			}
++	}
++
++	if ((ret = snd_soc_register_card(card))) {
++		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
++	}
++	return ret;
++}
++
++static int audioinjector_pi_soundcard_remove(struct platform_device *pdev)
++{
++	struct snd_soc_card *card = platform_get_drvdata(pdev);
++	return snd_soc_unregister_card(card);
++
++}
++
++static const struct of_device_id audioinjector_pi_soundcard_of_match[] = {
++	{ .compatible = "ai,audioinjector-pi-soundcard", },
++	{},
++};
++MODULE_DEVICE_TABLE(of, audioinjector_pi_soundcard_of_match);
++
++static struct platform_driver audioinjector_pi_soundcard_driver = {
++       .driver         = {
++		.name   = "audioinjector-audio",
++		.owner  = THIS_MODULE,
++		.of_match_table = audioinjector_pi_soundcard_of_match,
++       },
++       .probe          = audioinjector_pi_soundcard_probe,
++       .remove         = audioinjector_pi_soundcard_remove,
++};
++
++module_platform_driver(audioinjector_pi_soundcard_driver);
++MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>");
++MODULE_DESCRIPTION("AudioInjector.net Pi Soundcard");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:audioinjector-pi-soundcard");
++