brcm2708: update to latest version

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

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

1 files changed, 178 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0068-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch b/target/linux/brcm2708/patches-4.4/0068-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch
new file mode 100644
index 0000000..d16dcc4
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0068-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch
@@ -0,0 +1,178 @@
+From 7ab81054051a41288e4aa2bb21d4740e0d78a4ac Mon Sep 17 00:00:00 2001
+From: Gordon Garrity <gordon@iqaudio.com>
+Date: Sat, 8 Mar 2014 16:56:57 +0000
+Subject: [PATCH 068/232] Add IQaudIO Sound Card support for Raspberry Pi
+
+Set a limit of 0dB on Digital Volume Control
+
+The main volume control in the PCM512x DAC has a range up to
++24dB. This is dangerously loud and can potentially cause massive
+clipping in the output stages. Therefore this sets a sensible
+limit of 0dB for this control.
+---
+ sound/soc/bcm/Kconfig       |   7 +++
+ sound/soc/bcm/Makefile      |   2 +
+ sound/soc/bcm/iqaudio-dac.c | 132 ++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 141 insertions(+)
+ create mode 100644 sound/soc/bcm/iqaudio-dac.c
+
+--- a/sound/soc/bcm/Kconfig
++++ b/sound/soc/bcm/Kconfig
+@@ -28,3 +28,10 @@ config SND_BCM2708_SOC_RPI_DAC
+         select SND_SOC_PCM1794A
+         help
+          Say Y or M if you want to add support for RPi-DAC.
++
++config SND_BCM2708_SOC_IQAUDIO_DAC
++	tristate "Support for IQaudIO-DAC"
++	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
++	select SND_SOC_PCM512x_I2C
++	help
++	  Say Y or M if you want to add support for IQaudIO-DAC.
+--- a/sound/soc/bcm/Makefile
++++ b/sound/soc/bcm/Makefile
+@@ -7,7 +7,9 @@ obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd
+ snd-soc-hifiberry-dac-objs := hifiberry_dac.o
+ snd-soc-hifiberry-digi-objs := hifiberry_digi.o
+ snd-soc-rpi-dac-objs := rpi-dac.o
++snd-soc-iqaudio-dac-objs := iqaudio-dac.o
+ 
+ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
+ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
+ obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
++obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
+--- /dev/null
++++ b/sound/soc/bcm/iqaudio-dac.c
+@@ -0,0 +1,132 @@
++/*
++ * ASoC Driver for IQaudIO DAC
++ *
++ * Author:	Florian Meier <florian.meier@koalo.de>
++ *		Copyright 2013
++ *
++ * 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/platform_device.h>
++
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/pcm_params.h>
++#include <sound/soc.h>
++#include <sound/jack.h>
++
++static int snd_rpi_iqaudio_dac_init(struct snd_soc_pcm_runtime *rtd)
++{
++	int ret;
++	struct snd_soc_card *card = rtd->card;
++
++	ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
++	if (ret < 0)
++		dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
++
++	return 0;
++}
++
++static int snd_rpi_iqaudio_dac_hw_params(struct snd_pcm_substream *substream,
++				       struct snd_pcm_hw_params *params)
++{
++	struct snd_soc_pcm_runtime *rtd = substream->private_data;
++// NOT USED	struct snd_soc_dai *codec_dai = rtd->codec_dai;
++// NOT USED	struct snd_soc_codec *codec = rtd->codec;
++	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
++
++	unsigned int sample_bits =
++		snd_pcm_format_physical_width(params_format(params));
++
++	return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
++}
++
++/* machine stream operations */
++static struct snd_soc_ops snd_rpi_iqaudio_dac_ops = {
++	.hw_params = snd_rpi_iqaudio_dac_hw_params,
++};
++
++static struct snd_soc_dai_link snd_rpi_iqaudio_dac_dai[] = {
++{
++	.name		= "IQaudIO DAC",
++	.stream_name	= "IQaudIO DAC HiFi",
++	.cpu_dai_name	= "bcm2708-i2s.0",
++	.codec_dai_name	= "pcm512x-hifi",
++	.platform_name	= "bcm2708-i2s.0",
++	.codec_name	= "pcm512x.1-004c",
++	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
++				SND_SOC_DAIFMT_CBS_CFS,
++	.ops		= &snd_rpi_iqaudio_dac_ops,
++	.init		= snd_rpi_iqaudio_dac_init,
++},
++};
++
++/* audio machine driver */
++static struct snd_soc_card snd_rpi_iqaudio_dac = {
++	.name         = "IQaudIODAC",
++	.dai_link     = snd_rpi_iqaudio_dac_dai,
++	.num_links    = ARRAY_SIZE(snd_rpi_iqaudio_dac_dai),
++};
++
++static int snd_rpi_iqaudio_dac_probe(struct platform_device *pdev)
++{
++	int ret = 0;
++
++	snd_rpi_iqaudio_dac.dev = &pdev->dev;
++
++	if (pdev->dev.of_node) {
++	    struct device_node *i2s_node;
++	    struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_dac_dai[0];
++	    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;
++	    }
++	}
++
++	ret = snd_soc_register_card(&snd_rpi_iqaudio_dac);
++	if (ret)
++		dev_err(&pdev->dev,
++			"snd_soc_register_card() failed: %d\n", ret);
++
++	return ret;
++}
++
++static int snd_rpi_iqaudio_dac_remove(struct platform_device *pdev)
++{
++	return snd_soc_unregister_card(&snd_rpi_iqaudio_dac);
++}
++
++static const struct of_device_id iqaudio_of_match[] = {
++	{ .compatible = "iqaudio,iqaudio-dac", },
++	{},
++};
++MODULE_DEVICE_TABLE(of, iqaudio_of_match);
++
++static struct platform_driver snd_rpi_iqaudio_dac_driver = {
++	.driver = {
++		.name   = "snd-rpi-iqaudio-dac",
++		.owner  = THIS_MODULE,
++		.of_match_table = iqaudio_of_match,
++	},
++	.probe          = snd_rpi_iqaudio_dac_probe,
++	.remove         = snd_rpi_iqaudio_dac_remove,
++};
++
++module_platform_driver(snd_rpi_iqaudio_dac_driver);
++
++MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
++MODULE_DESCRIPTION("ASoC Driver for IQAudio DAC");
++MODULE_LICENSE("GPL v2");