target/linux/brcm2708/patches-4.4/0326-ARM-adau1977-adc-Add-basic-machine-driver-for-adau19.patch

   1 From 347d4cf757e6f093860048fe69737c29f5adcd0f Mon Sep 17 00:00:00 2001
   2 From: Andrey Grodzovsky <andrey2805@gmail.com>
   3 Date: Tue, 3 May 2016 22:10:59 -0400
   4 Subject: [PATCH 326/381] ARM: adau1977-adc: Add basic machine driver for
   5  adau1977 codec driver.
   6
   7 This commit adds basic support for the codec usage including: Device tree overlay,
   8 binding I2S bus and setting I2S mode, clock source and frequency setting according
   9 to spec.
  10
  11 Signed-off-by: Andrey Grodzovsky <andrey2805@gmail.com>
  12 ---
  13  arch/arm/boot/dts/overlays/Makefile                |   1 +
  14  arch/arm/boot/dts/overlays/README                  |   7 ++
  15  .../arm/boot/dts/overlays/adau1977-adc-overlay.dts |  53 +++++++++
  16  arch/arm/configs/bcm2709_defconfig                 |   1 +
  17  arch/arm/configs/bcmrpi_defconfig                  |   1 +
  18  sound/soc/bcm/Kconfig                              |   7 ++
  19  sound/soc/bcm/Makefile                             |   2 +
  20  sound/soc/bcm/adau1977-adc.c                       | 125 +++++++++++++++++++++
  21  8 files changed, 197 insertions(+)
  22  create mode 100644 arch/arm/boot/dts/overlays/adau1977-adc-overlay.dts
  23  create mode 100644 sound/soc/bcm/adau1977-adc.c
  24
  25 --- a/arch/arm/boot/dts/overlays/Makefile
  26 +++ b/arch/arm/boot/dts/overlays/Makefile
  27 @@ -12,6 +12,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
  28     RPI_DT_OVERLAYS=y
  29  endif
  30
  31 +dtbo-$(RPI_DT_OVERLAYS) += adau1977-adc.dtbo
  32  dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
  33  dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
  34  dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
  35 --- a/arch/arm/boot/dts/overlays/README
  36 +++ b/arch/arm/boot/dts/overlays/README
  37 @@ -161,6 +161,13 @@ Params:
  38          and the other i2c baudrate parameters.
  39
  40
  41 +Name:   adau1977-adc
  42 +Info:   Overlay for activation of ADAU1977 ADC codec over I2C for control
  43 +        and I2S for data.
  44 +Load:   dtoverlay=adau1977-adc
  45 +Params: <None>
  46 +
  47 +
  48  Name:   ads7846
  49  Info:   ADS7846 Touch controller
  50  Load:   dtoverlay=ads7846,<param>=<val>
  51 --- /dev/null
  52 +++ b/arch/arm/boot/dts/overlays/adau1977-adc-overlay.dts
  53 @@ -0,0 +1,53 @@
  54 +// Definitions for ADAU1977 ADC
  55 +/dts-v1/;
  56 +/plugin/;
  57 +
  58 +/ {
  59 +       compatible = "brcm,bcm2708";
  60 +
  61 +       fragment@0 {
  62 +               target = <&soc>;
  63 +
  64 +               __overlay__ {
  65 +                       codec_supply: fixedregulator@0 {
  66 +                               compatible = "regulator-fixed";
  67 +                               regulator-name = "AVDD";
  68 +                               regulator-min-microvolt = <3300000>;
  69 +                               regulator-max-microvolt = <3300000>;
  70 +                       };
  71 +               };
  72 +       };
  73 +
  74 +       fragment@1 {
  75 +               target = <&i2c>;
  76 +
  77 +               __overlay__ {
  78 +                       #address-cells = <1>;
  79 +                       #size-cells = <0>;
  80 +                       status = "okay";
  81 +
  82 +                       adau1977: codec@11 {
  83 +                               compatible = "adi,adau1977";
  84 +                               reg = <0x11>;
  85 +                               reset-gpios = <&gpio 5 0>;
  86 +                               AVDD-supply = <&codec_supply>;
  87 +                       };
  88 +               };
  89 +       };
  90 +
  91 +       fragment@2 {
  92 +               target = <&i2s>;
  93 +               __overlay__ {
  94 +                       status = "okay";
  95 +               };
  96 +       };
  97 +
  98 +       fragment@3 {
  99 +               target = <&sound>;
 100 +               __overlay__ {
 101 +                       compatible = "adi,adau1977-adc";
 102 +                       i2s-controller = <&i2s>;
 103 +                       status = "okay";
 104 +               };
 105 +       };
 106 +};
 107 --- a/arch/arm/configs/bcm2709_defconfig
 108 +++ b/arch/arm/configs/bcm2709_defconfig
 109 @@ -861,6 +861,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
 110  CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
 111  CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
 112  CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
 113 +CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
 114  CONFIG_SND_SOC_ADAU1701=m
 115  CONFIG_SND_SOC_WM8804_I2C=m
 116  CONFIG_SND_SIMPLE_CARD=m
 117 --- a/arch/arm/configs/bcmrpi_defconfig
 118 +++ b/arch/arm/configs/bcmrpi_defconfig
 119 @@ -853,6 +853,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
 120  CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
 121  CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
 122  CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
 123 +CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
 124  CONFIG_SND_SOC_ADAU1701=m
 125  CONFIG_SND_SOC_WM8804_I2C=m
 126  CONFIG_SND_SIMPLE_CARD=m
 127 --- a/sound/soc/bcm/Kconfig
 128 +++ b/sound/soc/bcm/Kconfig
 129 @@ -78,3 +78,10 @@ config SND_BCM2708_SOC_RASPIDAC3
 130         select SND_SOC_TPA6130A2
 131         help
 132           Say Y or M if you want to add support for RaspiDAC Rev.3x.
 133 +
 134 +config SND_BCM2708_SOC_ADAU1977_ADC
 135 +       tristate "Support for ADAU1977 ADC"
 136 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 137 +       select SND_SOC_ADAU1977_I2C
 138 +       help
 139 +         Say Y or M if you want to add support for ADAU1977 ADC.
 140 --- a/sound/soc/bcm/Makefile
 141 +++ b/sound/soc/bcm/Makefile
 142 @@ -4,6 +4,7 @@ snd-soc-bcm2835-i2s-objs := bcm2835-i2s.
 143  obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd-soc-bcm2835-i2s.o
 144
 145  # BCM2708 Machine Support
 146 +snd-soc-adau1977-adc-objs := adau1977-adc.o
 147  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
 148  snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
 149  snd-soc-hifiberry-digi-objs := hifiberry_digi.o
 150 @@ -15,6 +16,7 @@ snd-soc-rpi-proto-objs := rpi-proto.o
 151  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
 152  snd-soc-raspidac3-objs := raspidac3.o
 153
 154 +obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
 155  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
 156  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
 157  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
 158 --- /dev/null
 159 +++ b/sound/soc/bcm/adau1977-adc.c
 160 @@ -0,0 +1,125 @@
 161 +/*
 162 + * ASoC Driver for ADAU1977 ADC
 163 + *
 164 + * Author:     Andrey Grodzovsky <andrey2805@gmail.com>
 165 + *             Copyright 2016
 166 + *
 167 + * This file is based on hifibery_dac driver by Florian Meier.
 168 + *
 169 + * This program is free software; you can redistribute it and/or
 170 + * modify it under the terms of the GNU General Public License
 171 + * version 2 as published by the Free Software Foundation.
 172 + *
 173 + * This program is distributed in the hope that it will be useful, but
 174 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 175 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 176 + * General Public License for more details.
 177 + */
 178 +
 179 +#include <linux/module.h>
 180 +#include <linux/platform_device.h>
 181 +
 182 +#include <sound/core.h>
 183 +#include <sound/pcm.h>
 184 +#include <sound/pcm_params.h>
 185 +#include <sound/soc.h>
 186 +#include <sound/jack.h>
 187 +
 188 +enum adau1977_clk_id {
 189 +    ADAU1977_SYSCLK,
 190 +};
 191 +
 192 +enum adau1977_sysclk_src {
 193 +    ADAU1977_SYSCLK_SRC_MCLK,
 194 +    ADAU1977_SYSCLK_SRC_LRCLK,
 195 +};
 196 +
 197 +static int eval_adau1977_init(struct snd_soc_pcm_runtime *rtd)
 198 +{
 199 +       int ret;
 200 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 201 +
 202 +       ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 0, 0);
 203 +       if (ret < 0)
 204 +               return ret;
 205 +
 206 +       return snd_soc_codec_set_sysclk(rtd->codec, ADAU1977_SYSCLK,
 207 +                       ADAU1977_SYSCLK_SRC_MCLK, 11289600, SND_SOC_CLOCK_IN);
 208 +}
 209 +
 210 +static struct snd_soc_dai_link snd_rpi_adau1977_dai[] = {
 211 +       {
 212 +       .name = "adau1977",
 213 +       .stream_name = "ADAU1977",
 214 +       .cpu_dai_name = "bcm2708-i2s.0",
 215 +       .codec_dai_name = "adau1977-hifi",
 216 +       .platform_name = "bcm2708-i2s.0",
 217 +       .codec_name = "adau1977.1-0011",
 218 +       .init = eval_adau1977_init,
 219 +       .dai_fmt = SND_SOC_DAIFMT_I2S |
 220 +               SND_SOC_DAIFMT_NB_NF |
 221 +               SND_SOC_DAIFMT_CBM_CFM,
 222 +       },
 223 +};
 224 +
 225 +/* audio machine driver */
 226 +static struct snd_soc_card snd_adau1977_adc = {
 227 +       .name         = "snd_rpi_adau1977_adc",
 228 +       .owner        = THIS_MODULE,
 229 +       .dai_link     = snd_rpi_adau1977_dai,
 230 +       .num_links    = ARRAY_SIZE(snd_rpi_adau1977_dai),
 231 +};
 232 +
 233 +static int snd_adau1977_adc_probe(struct platform_device *pdev)
 234 +{
 235 +       int ret = 0;
 236 +
 237 +       snd_adau1977_adc.dev = &pdev->dev;
 238 +       if (pdev->dev.of_node) {
 239 +           struct device_node *i2s_node;
 240 +           struct snd_soc_dai_link *dai = &snd_rpi_adau1977_dai[0];
 241 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 242 +                                       "i2s-controller", 0);
 243 +
 244 +           if (i2s_node) {
 245 +               dai->cpu_dai_name = NULL;
 246 +               dai->cpu_of_node = i2s_node;
 247 +               dai->platform_name = NULL;
 248 +               dai->platform_of_node = i2s_node;
 249 +           }
 250 +       }
 251 +
 252 +       ret = snd_soc_register_card(&snd_adau1977_adc);
 253 +       if (ret)
 254 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 255 +
 256 +       return ret;
 257 +}
 258 +
 259 +static int snd_adau1977_adc_remove(struct platform_device *pdev)
 260 +{
 261 +       return snd_soc_unregister_card(&snd_adau1977_adc);
 262 +}
 263 +
 264 +static const struct of_device_id snd_adau1977_adc_of_match[] = {
 265 +       { .compatible = "adi,adau1977-adc", },
 266 +       {},
 267 +};
 268 +
 269 +MODULE_DEVICE_TABLE(of, snd_adau1977_adc_of_match);
 270 +
 271 +static struct platform_driver snd_adau1977_adc_driver = {
 272 +        .driver = {
 273 +                .name   = "snd-adau1977-adc",
 274 +                .owner  = THIS_MODULE,
 275 +               .of_match_table = snd_adau1977_adc_of_match,
 276 +        },
 277 +        .probe          = snd_adau1977_adc_probe,
 278 +        .remove         = snd_adau1977_adc_remove,
 279 +};
 280 +
 281 +module_platform_driver(snd_adau1977_adc_driver);
 282 +
 283 +MODULE_AUTHOR("Andrey Grodzovsky <andrey2805@gmail.com>");
 284 +MODULE_DESCRIPTION("ASoC Driver for ADAU1977 ADC");
 285 +MODULE_LICENSE("GPL v2");