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708 lines
18 KiB
708 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* wm8741.c -- WM8741 ALSA SoC Audio driver |
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* |
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* Copyright 2010-1 Wolfson Microelectronics plc |
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* |
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* Author: Ian Lartey <[email protected]> |
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*/ |
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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/spi/spi.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/slab.h> |
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#include <linux/of_device.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/initval.h> |
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#include <sound/tlv.h> |
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#include "wm8741.h" |
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#define WM8741_NUM_SUPPLIES 2 |
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static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = { |
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"AVDD", |
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"DVDD", |
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}; |
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|
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/* codec private data */ |
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struct wm8741_priv { |
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struct wm8741_platform_data pdata; |
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struct regmap *regmap; |
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struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES]; |
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unsigned int sysclk; |
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const struct snd_pcm_hw_constraint_list *sysclk_constraints; |
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}; |
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static const struct reg_default wm8741_reg_defaults[] = { |
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{ 0, 0x0000 }, /* R0 - DACLLSB Attenuation */ |
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{ 1, 0x0000 }, /* R1 - DACLMSB Attenuation */ |
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{ 2, 0x0000 }, /* R2 - DACRLSB Attenuation */ |
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{ 3, 0x0000 }, /* R3 - DACRMSB Attenuation */ |
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{ 4, 0x0000 }, /* R4 - Volume Control */ |
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{ 5, 0x000A }, /* R5 - Format Control */ |
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{ 6, 0x0000 }, /* R6 - Filter Control */ |
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{ 7, 0x0000 }, /* R7 - Mode Control 1 */ |
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{ 8, 0x0002 }, /* R8 - Mode Control 2 */ |
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{ 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */ |
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}; |
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static int wm8741_reset(struct snd_soc_component *component) |
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{ |
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return snd_soc_component_write(component, WM8741_RESET, 0); |
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} |
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static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0); |
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static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0); |
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static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = { |
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SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, |
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WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), |
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SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, |
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WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv), |
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}; |
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static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = { |
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SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, |
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1, 255, 1, dac_tlv_fine), |
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SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, |
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0, 511, 1, dac_tlv), |
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}; |
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static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = { |
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SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION, |
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1, 255, 1, dac_tlv_fine), |
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SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION, |
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0, 511, 1, dac_tlv), |
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}; |
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static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = { |
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SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_OUTPUT("VOUTLP"), |
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SND_SOC_DAPM_OUTPUT("VOUTLN"), |
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SND_SOC_DAPM_OUTPUT("VOUTRP"), |
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SND_SOC_DAPM_OUTPUT("VOUTRN"), |
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}; |
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static const struct snd_soc_dapm_route wm8741_dapm_routes[] = { |
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{ "VOUTLP", NULL, "DACL" }, |
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{ "VOUTLN", NULL, "DACL" }, |
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{ "VOUTRP", NULL, "DACR" }, |
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{ "VOUTRN", NULL, "DACR" }, |
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}; |
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static const unsigned int rates_11289[] = { |
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44100, 88200, |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_11289 = { |
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.count = ARRAY_SIZE(rates_11289), |
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.list = rates_11289, |
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}; |
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static const unsigned int rates_12288[] = { |
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32000, 48000, 96000, |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_12288 = { |
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.count = ARRAY_SIZE(rates_12288), |
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.list = rates_12288, |
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}; |
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static const unsigned int rates_16384[] = { |
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32000, |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_16384 = { |
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.count = ARRAY_SIZE(rates_16384), |
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.list = rates_16384, |
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}; |
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static const unsigned int rates_16934[] = { |
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44100, 88200, |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_16934 = { |
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.count = ARRAY_SIZE(rates_16934), |
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.list = rates_16934, |
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}; |
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static const unsigned int rates_18432[] = { |
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48000, 96000, |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_18432 = { |
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.count = ARRAY_SIZE(rates_18432), |
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.list = rates_18432, |
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}; |
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static const unsigned int rates_22579[] = { |
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44100, 88200, 176400 |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_22579 = { |
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.count = ARRAY_SIZE(rates_22579), |
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.list = rates_22579, |
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}; |
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static const unsigned int rates_24576[] = { |
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32000, 48000, 96000, 192000 |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_24576 = { |
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.count = ARRAY_SIZE(rates_24576), |
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.list = rates_24576, |
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}; |
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static const unsigned int rates_36864[] = { |
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48000, 96000, 192000 |
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}; |
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static const struct snd_pcm_hw_constraint_list constraints_36864 = { |
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.count = ARRAY_SIZE(rates_36864), |
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.list = rates_36864, |
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}; |
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static int wm8741_startup(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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if (wm8741->sysclk) |
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snd_pcm_hw_constraint_list(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, |
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wm8741->sysclk_constraints); |
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return 0; |
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} |
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static int wm8741_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_component *component = dai->component; |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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unsigned int iface, mode; |
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int i; |
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/* The set of sample rates that can be supported depends on the |
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* MCLK supplied to the CODEC - enforce this. |
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*/ |
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if (!wm8741->sysclk) { |
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dev_err(component->dev, |
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"No MCLK configured, call set_sysclk() on init or in hw_params\n"); |
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return -EINVAL; |
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} |
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/* Find a supported LRCLK rate */ |
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for (i = 0; i < wm8741->sysclk_constraints->count; i++) { |
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if (wm8741->sysclk_constraints->list[i] == params_rate(params)) |
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break; |
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} |
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if (i == wm8741->sysclk_constraints->count) { |
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dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n", |
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params_rate(params), wm8741->sysclk); |
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return -EINVAL; |
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} |
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/* bit size */ |
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switch (params_width(params)) { |
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case 16: |
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iface = 0x0; |
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break; |
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case 20: |
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iface = 0x1; |
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break; |
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case 24: |
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iface = 0x2; |
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break; |
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case 32: |
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iface = 0x3; |
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break; |
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default: |
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dev_dbg(component->dev, "wm8741_hw_params: Unsupported bit size param = %d", |
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params_width(params)); |
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return -EINVAL; |
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} |
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/* oversampling rate */ |
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if (params_rate(params) > 96000) |
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mode = 0x40; |
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else if (params_rate(params) > 48000) |
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mode = 0x20; |
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else |
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mode = 0x00; |
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dev_dbg(component->dev, "wm8741_hw_params: bit size param = %d, rate param = %d", |
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params_width(params), params_rate(params)); |
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snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK, |
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iface); |
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snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK, |
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mode); |
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return 0; |
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} |
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static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai, |
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int clk_id, unsigned int freq, int dir) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq); |
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switch (freq) { |
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case 0: |
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wm8741->sysclk_constraints = NULL; |
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break; |
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case 11289600: |
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wm8741->sysclk_constraints = &constraints_11289; |
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break; |
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case 12288000: |
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wm8741->sysclk_constraints = &constraints_12288; |
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break; |
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case 16384000: |
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wm8741->sysclk_constraints = &constraints_16384; |
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break; |
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case 16934400: |
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wm8741->sysclk_constraints = &constraints_16934; |
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break; |
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case 18432000: |
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wm8741->sysclk_constraints = &constraints_18432; |
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break; |
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case 22579200: |
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case 33868800: |
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wm8741->sysclk_constraints = &constraints_22579; |
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break; |
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case 24576000: |
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wm8741->sysclk_constraints = &constraints_24576; |
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break; |
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case 36864000: |
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wm8741->sysclk_constraints = &constraints_36864; |
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break; |
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default: |
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return -EINVAL; |
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} |
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wm8741->sysclk = freq; |
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return 0; |
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} |
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static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai, |
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unsigned int fmt) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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unsigned int iface; |
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/* check master/slave audio interface */ |
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
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case SND_SOC_DAIFMT_CBS_CFS: |
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break; |
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default: |
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return -EINVAL; |
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} |
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/* interface format */ |
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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 = 0x08; |
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break; |
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case SND_SOC_DAIFMT_RIGHT_J: |
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iface = 0x00; |
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break; |
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case SND_SOC_DAIFMT_LEFT_J: |
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iface = 0x04; |
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break; |
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case SND_SOC_DAIFMT_DSP_A: |
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iface = 0x0C; |
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break; |
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case SND_SOC_DAIFMT_DSP_B: |
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iface = 0x1C; |
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break; |
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default: |
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return -EINVAL; |
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} |
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/* clock inversion */ |
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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_NB_IF: |
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iface |= 0x10; |
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break; |
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case SND_SOC_DAIFMT_IB_NF: |
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iface |= 0x20; |
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break; |
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case SND_SOC_DAIFMT_IB_IF: |
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iface |= 0x30; |
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break; |
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default: |
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return -EINVAL; |
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} |
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dev_dbg(component->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n", |
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fmt & SND_SOC_DAIFMT_FORMAT_MASK, |
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((fmt & SND_SOC_DAIFMT_INV_MASK))); |
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snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, |
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WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK, |
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iface); |
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return 0; |
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} |
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static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute, int direction) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL, |
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WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT); |
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return 0; |
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} |
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#define WM8741_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 | SNDRV_PCM_RATE_176400 | \ |
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SNDRV_PCM_RATE_192000) |
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#define WM8741_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 const struct snd_soc_dai_ops wm8741_dai_ops = { |
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.startup = wm8741_startup, |
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.hw_params = wm8741_hw_params, |
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.set_sysclk = wm8741_set_dai_sysclk, |
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.set_fmt = wm8741_set_dai_fmt, |
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.mute_stream = wm8741_mute, |
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.no_capture_mute = 1, |
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}; |
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static struct snd_soc_dai_driver wm8741_dai = { |
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.name = "wm8741", |
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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 = WM8741_RATES, |
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.formats = WM8741_FORMATS, |
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}, |
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.ops = &wm8741_dai_ops, |
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}; |
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#ifdef CONFIG_PM |
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static int wm8741_resume(struct snd_soc_component *component) |
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{ |
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snd_soc_component_cache_sync(component); |
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return 0; |
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} |
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#else |
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#define wm8741_resume NULL |
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#endif |
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static int wm8741_configure(struct snd_soc_component *component) |
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{ |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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|
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/* Configure differential mode */ |
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switch (wm8741->pdata.diff_mode) { |
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case WM8741_DIFF_MODE_STEREO: |
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case WM8741_DIFF_MODE_STEREO_REVERSED: |
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case WM8741_DIFF_MODE_MONO_LEFT: |
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case WM8741_DIFF_MODE_MONO_RIGHT: |
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snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2, |
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WM8741_DIFF_MASK, |
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wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT); |
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break; |
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default: |
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return -EINVAL; |
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} |
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/* Change some default settings - latch VU */ |
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snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION, |
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WM8741_UPDATELL, WM8741_UPDATELL); |
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snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION, |
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WM8741_UPDATELM, WM8741_UPDATELM); |
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snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION, |
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WM8741_UPDATERL, WM8741_UPDATERL); |
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snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION, |
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WM8741_UPDATERM, WM8741_UPDATERM); |
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return 0; |
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} |
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static int wm8741_add_controls(struct snd_soc_component *component) |
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{ |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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|
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switch (wm8741->pdata.diff_mode) { |
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case WM8741_DIFF_MODE_STEREO: |
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case WM8741_DIFF_MODE_STEREO_REVERSED: |
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snd_soc_add_component_controls(component, |
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wm8741_snd_controls_stereo, |
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ARRAY_SIZE(wm8741_snd_controls_stereo)); |
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break; |
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case WM8741_DIFF_MODE_MONO_LEFT: |
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snd_soc_add_component_controls(component, |
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wm8741_snd_controls_mono_left, |
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ARRAY_SIZE(wm8741_snd_controls_mono_left)); |
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break; |
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case WM8741_DIFF_MODE_MONO_RIGHT: |
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snd_soc_add_component_controls(component, |
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wm8741_snd_controls_mono_right, |
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ARRAY_SIZE(wm8741_snd_controls_mono_right)); |
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break; |
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default: |
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return -EINVAL; |
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} |
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|
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return 0; |
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} |
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static int wm8741_probe(struct snd_soc_component *component) |
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{ |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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int ret = 0; |
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|
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ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies), |
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wm8741->supplies); |
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if (ret != 0) { |
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dev_err(component->dev, "Failed to enable supplies: %d\n", ret); |
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goto err_get; |
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} |
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ret = wm8741_reset(component); |
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if (ret < 0) { |
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dev_err(component->dev, "Failed to issue reset\n"); |
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goto err_enable; |
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} |
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ret = wm8741_configure(component); |
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if (ret < 0) { |
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dev_err(component->dev, "Failed to change default settings\n"); |
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goto err_enable; |
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} |
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ret = wm8741_add_controls(component); |
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if (ret < 0) { |
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dev_err(component->dev, "Failed to add controls\n"); |
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goto err_enable; |
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} |
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dev_dbg(component->dev, "Successful registration\n"); |
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return ret; |
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err_enable: |
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regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); |
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err_get: |
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return ret; |
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} |
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static void wm8741_remove(struct snd_soc_component *component) |
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{ |
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struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); |
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|
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regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); |
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} |
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static const struct snd_soc_component_driver soc_component_dev_wm8741 = { |
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.probe = wm8741_probe, |
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.remove = wm8741_remove, |
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.resume = wm8741_resume, |
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.dapm_widgets = wm8741_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets), |
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.dapm_routes = wm8741_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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}; |
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static const struct of_device_id wm8741_of_match[] = { |
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{ .compatible = "wlf,wm8741", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, wm8741_of_match); |
|
|
|
static const struct regmap_config wm8741_regmap = { |
|
.reg_bits = 7, |
|
.val_bits = 9, |
|
.max_register = WM8741_MAX_REGISTER, |
|
|
|
.reg_defaults = wm8741_reg_defaults, |
|
.num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults), |
|
.cache_type = REGCACHE_RBTREE, |
|
}; |
|
|
|
static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741) |
|
{ |
|
const struct wm8741_platform_data *pdata = dev_get_platdata(dev); |
|
u32 diff_mode; |
|
|
|
if (dev->of_node) { |
|
if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode) |
|
>= 0) |
|
wm8741->pdata.diff_mode = diff_mode; |
|
} else { |
|
if (pdata != NULL) |
|
memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata)); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_I2C) |
|
static int wm8741_i2c_probe(struct i2c_client *i2c) |
|
{ |
|
struct wm8741_priv *wm8741; |
|
int ret, i; |
|
|
|
wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv), |
|
GFP_KERNEL); |
|
if (wm8741 == NULL) |
|
return -ENOMEM; |
|
|
|
for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) |
|
wm8741->supplies[i].supply = wm8741_supply_names[i]; |
|
|
|
ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies), |
|
wm8741->supplies); |
|
if (ret != 0) { |
|
dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap); |
|
if (IS_ERR(wm8741->regmap)) { |
|
ret = PTR_ERR(wm8741->regmap); |
|
dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = wm8741_set_pdata(&i2c->dev, wm8741); |
|
if (ret != 0) { |
|
dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
i2c_set_clientdata(i2c, wm8741); |
|
|
|
ret = devm_snd_soc_register_component(&i2c->dev, |
|
&soc_component_dev_wm8741, &wm8741_dai, 1); |
|
|
|
return ret; |
|
} |
|
|
|
static const struct i2c_device_id wm8741_i2c_id[] = { |
|
{ "wm8741", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id); |
|
|
|
static struct i2c_driver wm8741_i2c_driver = { |
|
.driver = { |
|
.name = "wm8741", |
|
.of_match_table = wm8741_of_match, |
|
}, |
|
.probe_new = wm8741_i2c_probe, |
|
.id_table = wm8741_i2c_id, |
|
}; |
|
#endif |
|
|
|
#if defined(CONFIG_SPI_MASTER) |
|
static int wm8741_spi_probe(struct spi_device *spi) |
|
{ |
|
struct wm8741_priv *wm8741; |
|
int ret, i; |
|
|
|
wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv), |
|
GFP_KERNEL); |
|
if (wm8741 == NULL) |
|
return -ENOMEM; |
|
|
|
for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) |
|
wm8741->supplies[i].supply = wm8741_supply_names[i]; |
|
|
|
ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies), |
|
wm8741->supplies); |
|
if (ret != 0) { |
|
dev_err(&spi->dev, "Failed to request supplies: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap); |
|
if (IS_ERR(wm8741->regmap)) { |
|
ret = PTR_ERR(wm8741->regmap); |
|
dev_err(&spi->dev, "Failed to init regmap: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = wm8741_set_pdata(&spi->dev, wm8741); |
|
if (ret != 0) { |
|
dev_err(&spi->dev, "Failed to set pdata: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
spi_set_drvdata(spi, wm8741); |
|
|
|
ret = devm_snd_soc_register_component(&spi->dev, |
|
&soc_component_dev_wm8741, &wm8741_dai, 1); |
|
return ret; |
|
} |
|
|
|
static struct spi_driver wm8741_spi_driver = { |
|
.driver = { |
|
.name = "wm8741", |
|
.of_match_table = wm8741_of_match, |
|
}, |
|
.probe = wm8741_spi_probe, |
|
}; |
|
#endif /* CONFIG_SPI_MASTER */ |
|
|
|
static int __init wm8741_modinit(void) |
|
{ |
|
int ret = 0; |
|
|
|
#if IS_ENABLED(CONFIG_I2C) |
|
ret = i2c_add_driver(&wm8741_i2c_driver); |
|
if (ret != 0) |
|
pr_err("Failed to register WM8741 I2C driver: %d\n", ret); |
|
#endif |
|
#if defined(CONFIG_SPI_MASTER) |
|
ret = spi_register_driver(&wm8741_spi_driver); |
|
if (ret != 0) { |
|
printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n", |
|
ret); |
|
} |
|
#endif |
|
|
|
return ret; |
|
} |
|
module_init(wm8741_modinit); |
|
|
|
static void __exit wm8741_exit(void) |
|
{ |
|
#if defined(CONFIG_SPI_MASTER) |
|
spi_unregister_driver(&wm8741_spi_driver); |
|
#endif |
|
#if IS_ENABLED(CONFIG_I2C) |
|
i2c_del_driver(&wm8741_i2c_driver); |
|
#endif |
|
} |
|
module_exit(wm8741_exit); |
|
|
|
MODULE_DESCRIPTION("ASoC WM8741 driver"); |
|
MODULE_AUTHOR("Ian Lartey <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|