704 lines
16 KiB
C
704 lines
16 KiB
C
/*
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* wm8776.c -- WM8776 ALSA SoC Audio driver
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*
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* Copyright 2009 Wolfson Microelectronics plc
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* TODO: Input ALC/limiter support
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#include "wm8776.h"
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static struct snd_soc_codec *wm8776_codec;
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struct snd_soc_codec_device soc_codec_dev_wm8776;
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/* codec private data */
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struct wm8776_priv {
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struct snd_soc_codec codec;
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u16 reg_cache[WM8776_CACHEREGNUM];
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int sysclk[2];
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};
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#ifdef CONFIG_SPI_MASTER
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static int wm8776_spi_write(struct spi_device *spi, const char *data, int len);
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#endif
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static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
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0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */
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0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */
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0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */
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0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */
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0xa6, 0x01, 0x01
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};
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static int wm8776_reset(struct snd_soc_codec *codec)
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{
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return snd_soc_write(codec, WM8776_RESET, 0);
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}
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static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
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static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
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static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
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static const struct snd_kcontrol_new wm8776_snd_controls[] = {
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SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
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0, 127, 0, hp_tlv),
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SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
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0, 255, 0, dac_tlv),
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SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
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SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
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SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
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0, 255, 0, adc_tlv),
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SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
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SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
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SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
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};
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static const struct snd_kcontrol_new inmix_controls[] = {
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SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
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SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
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SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
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SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
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SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
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};
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static const struct snd_kcontrol_new outmix_controls[] = {
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SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
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SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
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SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
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};
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static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("AUX"),
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SND_SOC_DAPM_INPUT("AIN1"),
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SND_SOC_DAPM_INPUT("AIN2"),
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SND_SOC_DAPM_INPUT("AIN3"),
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SND_SOC_DAPM_INPUT("AIN4"),
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SND_SOC_DAPM_INPUT("AIN5"),
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SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
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inmix_controls, ARRAY_SIZE(inmix_controls)),
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SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
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SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
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SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
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outmix_controls, ARRAY_SIZE(outmix_controls)),
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SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
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SND_SOC_DAPM_OUTPUT("VOUT"),
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SND_SOC_DAPM_OUTPUT("HPOUTL"),
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SND_SOC_DAPM_OUTPUT("HPOUTR"),
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};
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static const struct snd_soc_dapm_route routes[] = {
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{ "Input Mixer", "AIN1 Switch", "AIN1" },
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{ "Input Mixer", "AIN2 Switch", "AIN2" },
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{ "Input Mixer", "AIN3 Switch", "AIN3" },
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{ "Input Mixer", "AIN4 Switch", "AIN4" },
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{ "Input Mixer", "AIN5 Switch", "AIN5" },
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{ "ADC", NULL, "Input Mixer" },
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{ "Output Mixer", "DAC Switch", "DAC" },
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{ "Output Mixer", "AUX Switch", "AUX" },
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{ "Output Mixer", "Bypass Switch", "Input Mixer" },
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{ "VOUT", NULL, "Output Mixer" },
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{ "Headphone PGA", NULL, "Output Mixer" },
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{ "HPOUTL", NULL, "Headphone PGA" },
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{ "HPOUTR", NULL, "Headphone PGA" },
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};
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static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct snd_soc_codec *codec = dai->codec;
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int reg, iface, master;
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switch (dai->id) {
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case WM8776_DAI_DAC:
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reg = WM8776_DACIFCTRL;
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master = 0x80;
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break;
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case WM8776_DAI_ADC:
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reg = WM8776_ADCIFCTRL;
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master = 0x100;
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break;
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default:
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return -EINVAL;
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}
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iface = 0;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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master = 0;
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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iface |= 0x0002;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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iface |= 0x0001;
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break;
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/* FIXME: CHECK A/B */
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case SND_SOC_DAIFMT_DSP_A:
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iface |= 0x0003;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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iface |= 0x0007;
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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case SND_SOC_DAIFMT_IB_IF:
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iface |= 0x00c;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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iface |= 0x008;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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iface |= 0x004;
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break;
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default:
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return -EINVAL;
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}
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/* Finally, write out the values */
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snd_soc_update_bits(codec, reg, 0xf, iface);
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snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
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return 0;
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}
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static int mclk_ratios[] = {
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128,
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192,
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256,
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384,
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512,
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768,
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};
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static int wm8776_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
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int iface_reg, iface;
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int ratio_shift, master;
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int i;
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iface = 0;
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switch (dai->id) {
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case WM8776_DAI_DAC:
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iface_reg = WM8776_DACIFCTRL;
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master = 0x80;
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ratio_shift = 4;
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break;
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case WM8776_DAI_ADC:
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iface_reg = WM8776_ADCIFCTRL;
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master = 0x100;
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ratio_shift = 0;
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break;
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default:
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return -EINVAL;
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}
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/* Set word length */
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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break;
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case SNDRV_PCM_FORMAT_S20_3LE:
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iface |= 0x10;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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iface |= 0x20;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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iface |= 0x30;
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break;
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}
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/* Only need to set MCLK/LRCLK ratio if we're master */
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if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
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for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
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if (wm8776->sysclk[dai->id] / params_rate(params)
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== mclk_ratios[i])
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break;
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}
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if (i == ARRAY_SIZE(mclk_ratios)) {
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dev_err(codec->dev,
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"Unable to configure MCLK ratio %d/%d\n",
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wm8776->sysclk[dai->id], params_rate(params));
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return -EINVAL;
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}
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dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
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snd_soc_update_bits(codec, WM8776_MSTRCTRL,
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0x7 << ratio_shift, i << ratio_shift);
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} else {
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dev_dbg(codec->dev, "DAI in slave mode\n");
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}
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snd_soc_update_bits(codec, iface_reg, 0x30, iface);
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return 0;
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}
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static int wm8776_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
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}
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static int wm8776_set_sysclk(struct snd_soc_dai *dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
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BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk));
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wm8776->sysclk[dai->id] = freq;
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return 0;
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}
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static int wm8776_set_bias_level(struct snd_soc_codec *codec,
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enum snd_soc_bias_level level)
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{
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switch (level) {
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case SND_SOC_BIAS_ON:
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break;
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case SND_SOC_BIAS_PREPARE:
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break;
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case SND_SOC_BIAS_STANDBY:
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if (codec->bias_level == SND_SOC_BIAS_OFF) {
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/* Disable the global powerdown; DAPM does the rest */
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snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
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}
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break;
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case SND_SOC_BIAS_OFF:
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snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
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break;
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}
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codec->bias_level = level;
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return 0;
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}
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#define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
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SNDRV_PCM_RATE_96000)
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#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
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SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
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static struct snd_soc_dai_ops wm8776_dac_ops = {
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.digital_mute = wm8776_mute,
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.hw_params = wm8776_hw_params,
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.set_fmt = wm8776_set_fmt,
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.set_sysclk = wm8776_set_sysclk,
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};
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static struct snd_soc_dai_ops wm8776_adc_ops = {
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.hw_params = wm8776_hw_params,
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.set_fmt = wm8776_set_fmt,
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.set_sysclk = wm8776_set_sysclk,
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};
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struct snd_soc_dai wm8776_dai[] = {
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{
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.name = "WM8776 Playback",
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.id = WM8776_DAI_DAC,
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = WM8776_RATES,
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.formats = WM8776_FORMATS,
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},
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.ops = &wm8776_dac_ops,
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},
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{
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.name = "WM8776 Capture",
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.id = WM8776_DAI_ADC,
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.capture = {
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.stream_name = "Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = WM8776_RATES,
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.formats = WM8776_FORMATS,
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},
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.ops = &wm8776_adc_ops,
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},
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};
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EXPORT_SYMBOL_GPL(wm8776_dai);
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#ifdef CONFIG_PM
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static int wm8776_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
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return 0;
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}
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static int wm8776_resume(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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int i;
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u8 data[2];
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u16 *cache = codec->reg_cache;
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/* Sync reg_cache with the hardware */
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for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
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if (cache[i] == wm8776_reg[i])
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continue;
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data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
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data[1] = cache[i] & 0x00ff;
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codec->hw_write(codec->control_data, data, 2);
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}
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wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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return 0;
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}
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#else
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#define wm8776_suspend NULL
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#define wm8776_resume NULL
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#endif
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static int wm8776_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret = 0;
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if (wm8776_codec == NULL) {
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dev_err(&pdev->dev, "Codec device not registered\n");
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return -ENODEV;
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}
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socdev->card->codec = wm8776_codec;
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codec = wm8776_codec;
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/* register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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dev_err(codec->dev, "failed to create pcms: %d\n", ret);
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goto pcm_err;
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}
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snd_soc_add_controls(codec, wm8776_snd_controls,
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ARRAY_SIZE(wm8776_snd_controls));
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snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
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ARRAY_SIZE(wm8776_dapm_widgets));
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snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
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return ret;
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pcm_err:
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return ret;
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}
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/* power down chip */
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static int wm8776_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_wm8776 = {
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.probe = wm8776_probe,
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.remove = wm8776_remove,
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.suspend = wm8776_suspend,
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.resume = wm8776_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776);
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static int wm8776_register(struct wm8776_priv *wm8776,
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enum snd_soc_control_type control)
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{
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int ret, i;
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struct snd_soc_codec *codec = &wm8776->codec;
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if (wm8776_codec) {
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dev_err(codec->dev, "Another WM8776 is registered\n");
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ret = -EINVAL;
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|
goto err;
|
|
}
|
|
|
|
mutex_init(&codec->mutex);
|
|
INIT_LIST_HEAD(&codec->dapm_widgets);
|
|
INIT_LIST_HEAD(&codec->dapm_paths);
|
|
|
|
snd_soc_codec_set_drvdata(codec, wm8776);
|
|
codec->name = "WM8776";
|
|
codec->owner = THIS_MODULE;
|
|
codec->bias_level = SND_SOC_BIAS_OFF;
|
|
codec->set_bias_level = wm8776_set_bias_level;
|
|
codec->dai = wm8776_dai;
|
|
codec->num_dai = ARRAY_SIZE(wm8776_dai);
|
|
codec->reg_cache_size = WM8776_CACHEREGNUM;
|
|
codec->reg_cache = &wm8776->reg_cache;
|
|
|
|
memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg));
|
|
|
|
ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++)
|
|
wm8776_dai[i].dev = codec->dev;
|
|
|
|
ret = wm8776_reset(codec);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
|
/* Latch the update bits; right channel only since we always
|
|
* update both. */
|
|
snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
|
|
snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
|
|
|
|
wm8776_codec = codec;
|
|
|
|
ret = snd_soc_register_codec(codec);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
|
|
goto err_codec;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_codec:
|
|
snd_soc_unregister_codec(codec);
|
|
err:
|
|
kfree(wm8776);
|
|
return ret;
|
|
}
|
|
|
|
static void wm8776_unregister(struct wm8776_priv *wm8776)
|
|
{
|
|
wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF);
|
|
snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
|
|
snd_soc_unregister_codec(&wm8776->codec);
|
|
kfree(wm8776);
|
|
wm8776_codec = NULL;
|
|
}
|
|
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
static int wm8776_spi_write(struct spi_device *spi, const char *data, int len)
|
|
{
|
|
struct spi_transfer t;
|
|
struct spi_message m;
|
|
u8 msg[2];
|
|
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
msg[0] = data[0];
|
|
msg[1] = data[1];
|
|
|
|
spi_message_init(&m);
|
|
memset(&t, 0, (sizeof t));
|
|
|
|
t.tx_buf = &msg[0];
|
|
t.len = len;
|
|
|
|
spi_message_add_tail(&t, &m);
|
|
spi_sync(spi, &m);
|
|
|
|
return len;
|
|
}
|
|
|
|
static int __devinit wm8776_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct snd_soc_codec *codec;
|
|
struct wm8776_priv *wm8776;
|
|
|
|
wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
|
|
if (wm8776 == NULL)
|
|
return -ENOMEM;
|
|
|
|
codec = &wm8776->codec;
|
|
codec->control_data = spi;
|
|
codec->hw_write = (hw_write_t)wm8776_spi_write;
|
|
codec->dev = &spi->dev;
|
|
|
|
dev_set_drvdata(&spi->dev, wm8776);
|
|
|
|
return wm8776_register(wm8776, SND_SOC_SPI);
|
|
}
|
|
|
|
static int __devexit wm8776_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
|
|
|
|
wm8776_unregister(wm8776);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct spi_driver wm8776_spi_driver = {
|
|
.driver = {
|
|
.name = "wm8776",
|
|
.bus = &spi_bus_type,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8776_spi_probe,
|
|
.remove = __devexit_p(wm8776_spi_remove),
|
|
};
|
|
#endif /* CONFIG_SPI_MASTER */
|
|
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wm8776_priv *wm8776;
|
|
struct snd_soc_codec *codec;
|
|
|
|
wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
|
|
if (wm8776 == NULL)
|
|
return -ENOMEM;
|
|
|
|
codec = &wm8776->codec;
|
|
codec->hw_write = (hw_write_t)i2c_master_send;
|
|
|
|
i2c_set_clientdata(i2c, wm8776);
|
|
codec->control_data = i2c;
|
|
|
|
codec->dev = &i2c->dev;
|
|
|
|
return wm8776_register(wm8776, SND_SOC_I2C);
|
|
}
|
|
|
|
static __devexit int wm8776_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
|
|
wm8776_unregister(wm8776);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id wm8776_i2c_id[] = {
|
|
{ "wm8776", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
|
|
|
|
static struct i2c_driver wm8776_i2c_driver = {
|
|
.driver = {
|
|
.name = "wm8776",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8776_i2c_probe,
|
|
.remove = __devexit_p(wm8776_i2c_remove),
|
|
.id_table = wm8776_i2c_id,
|
|
};
|
|
#endif
|
|
|
|
static int __init wm8776_modinit(void)
|
|
{
|
|
int ret;
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
ret = i2c_add_driver(&wm8776_i2c_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
ret = spi_register_driver(&wm8776_spi_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
module_init(wm8776_modinit);
|
|
|
|
static void __exit wm8776_exit(void)
|
|
{
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
i2c_del_driver(&wm8776_i2c_driver);
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
spi_unregister_driver(&wm8776_spi_driver);
|
|
#endif
|
|
}
|
|
module_exit(wm8776_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC WM8776 driver");
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_LICENSE("GPL");
|