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openwrtv4/target/linux/brcm2708/patches-4.4/0323-ARM-adau1977-adc-Add-basic-machine-driver-for-adau19.patch
Álvaro Fernández Rojas 20402106a3 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

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-07-09 16:29:18 +02:00

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From 8c2a8f26d78f29aa349b184a9e87586df735b51e Mon Sep 17 00:00:00 2001
From: Andrey Grodzovsky <andrey2805@gmail.com>
Date: Tue, 3 May 2016 22:10:59 -0400
Subject: [PATCH 323/423] ARM: adau1977-adc: Add basic machine driver for
adau1977 codec driver.
This commit adds basic support for the codec usage including: Device tree overlay,
binding I2S bus and setting I2S mode, clock source and frequency setting according
to spec.
Signed-off-by: Andrey Grodzovsky <andrey2805@gmail.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 7 ++
.../arm/boot/dts/overlays/adau1977-adc-overlay.dts | 53 +++++++++
arch/arm/configs/bcm2709_defconfig | 1 +
arch/arm/configs/bcmrpi_defconfig | 1 +
sound/soc/bcm/Kconfig | 7 ++
sound/soc/bcm/Makefile | 2 +
sound/soc/bcm/adau1977-adc.c | 125 +++++++++++++++++++++
8 files changed, 197 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/adau1977-adc-overlay.dts
create mode 100644 sound/soc/bcm/adau1977-adc.c
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -12,6 +12,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
RPI_DT_OVERLAYS=y
endif
+dtbo-$(RPI_DT_OVERLAYS) += adau1977-adc.dtbo
dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -161,6 +161,13 @@ Params:
and the other i2c baudrate parameters.
+Name: adau1977-adc
+Info: Overlay for activation of ADAU1977 ADC codec over I2C for control
+ and I2S for data.
+Load: dtoverlay=adau1977-adc
+Params: <None>
+
+
Name: ads7846
Info: ADS7846 Touch controller
Load: dtoverlay=ads7846,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/adau1977-adc-overlay.dts
@@ -0,0 +1,53 @@
+// Definitions for ADAU1977 ADC
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target = <&soc>;
+
+ __overlay__ {
+ codec_supply: fixedregulator@0 {
+ compatible = "regulator-fixed";
+ regulator-name = "AVDD";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&i2c>;
+
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ adau1977: codec@11 {
+ compatible = "adi,adau1977";
+ reg = <0x11>;
+ reset-gpios = <&gpio 5 0>;
+ AVDD-supply = <&codec_supply>;
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&i2s>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@3 {
+ target = <&sound>;
+ __overlay__ {
+ compatible = "adi,adau1977-adc";
+ i2s-controller = <&i2s>;
+ status = "okay";
+ };
+ };
+};
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -861,6 +861,7 @@ 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_BCM2708_SOC_ADAU1977_ADC=m
CONFIG_SND_SOC_ADAU1701=m
CONFIG_SND_SOC_WM8804_I2C=m
CONFIG_SND_SIMPLE_CARD=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -853,6 +853,7 @@ 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_BCM2708_SOC_ADAU1977_ADC=m
CONFIG_SND_SOC_ADAU1701=m
CONFIG_SND_SOC_WM8804_I2C=m
CONFIG_SND_SIMPLE_CARD=m
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -78,3 +78,10 @@ config SND_BCM2708_SOC_RASPIDAC3
select SND_SOC_TPA6130A2
help
Say Y or M if you want to add support for RaspiDAC Rev.3x.
+
+config SND_BCM2708_SOC_ADAU1977_ADC
+ tristate "Support for ADAU1977 ADC"
+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+ select SND_SOC_ADAU1977_I2C
+ help
+ Say Y or M if you want to add support for ADAU1977 ADC.
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -4,6 +4,7 @@ snd-soc-bcm2835-i2s-objs := bcm2835-i2s.
obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd-soc-bcm2835-i2s.o
# BCM2708 Machine Support
+snd-soc-adau1977-adc-objs := adau1977-adc.o
snd-soc-hifiberry-dac-objs := hifiberry_dac.o
snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
snd-soc-hifiberry-digi-objs := hifiberry_digi.o
@@ -15,6 +16,7 @@ snd-soc-rpi-proto-objs := rpi-proto.o
snd-soc-iqaudio-dac-objs := iqaudio-dac.o
snd-soc-raspidac3-objs := raspidac3.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
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
--- /dev/null
+++ b/sound/soc/bcm/adau1977-adc.c
@@ -0,0 +1,125 @@
+/*
+ * ASoC Driver for ADAU1977 ADC
+ *
+ * Author: Andrey Grodzovsky <andrey2805@gmail.com>
+ * Copyright 2016
+ *
+ * This file is based on hifibery_dac driver by Florian Meier.
+ *
+ * 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>
+
+enum adau1977_clk_id {
+ ADAU1977_SYSCLK,
+};
+
+enum adau1977_sysclk_src {
+ ADAU1977_SYSCLK_SRC_MCLK,
+ ADAU1977_SYSCLK_SRC_LRCLK,
+};
+
+static int eval_adau1977_init(struct snd_soc_pcm_runtime *rtd)
+{
+ int ret;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ return snd_soc_codec_set_sysclk(rtd->codec, ADAU1977_SYSCLK,
+ ADAU1977_SYSCLK_SRC_MCLK, 11289600, SND_SOC_CLOCK_IN);
+}
+
+static struct snd_soc_dai_link snd_rpi_adau1977_dai[] = {
+ {
+ .name = "adau1977",
+ .stream_name = "ADAU1977",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "adau1977-hifi",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "adau1977.1-0011",
+ .init = eval_adau1977_init,
+ .dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM,
+ },
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_adau1977_adc = {
+ .name = "snd_rpi_adau1977_adc",
+ .owner = THIS_MODULE,
+ .dai_link = snd_rpi_adau1977_dai,
+ .num_links = ARRAY_SIZE(snd_rpi_adau1977_dai),
+};
+
+static int snd_adau1977_adc_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_adau1977_adc.dev = &pdev->dev;
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai = &snd_rpi_adau1977_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_adau1977_adc);
+ if (ret)
+ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
+
+ return ret;
+}
+
+static int snd_adau1977_adc_remove(struct platform_device *pdev)
+{
+ return snd_soc_unregister_card(&snd_adau1977_adc);
+}
+
+static const struct of_device_id snd_adau1977_adc_of_match[] = {
+ { .compatible = "adi,adau1977-adc", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, snd_adau1977_adc_of_match);
+
+static struct platform_driver snd_adau1977_adc_driver = {
+ .driver = {
+ .name = "snd-adau1977-adc",
+ .owner = THIS_MODULE,
+ .of_match_table = snd_adau1977_adc_of_match,
+ },
+ .probe = snd_adau1977_adc_probe,
+ .remove = snd_adau1977_adc_remove,
+};
+
+module_platform_driver(snd_adau1977_adc_driver);
+
+MODULE_AUTHOR("Andrey Grodzovsky <andrey2805@gmail.com>");
+MODULE_DESCRIPTION("ASoC Driver for ADAU1977 ADC");
+MODULE_LICENSE("GPL v2");
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