--- /dev/null
+/*
+ * wm8804.c -- WM8804 S/PDIF transceiver driver
+ *
+ * Copyright 2010-11 Wolfson Microelectronics plc
+ *
+ * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <sound/soc-dapm.h>
+
+#include "wm8804.h"
+
+#define WM8804_NUM_SUPPLIES 2
+static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = {
+ "PVDD",
+ "DVDD"
+};
+
+static const struct reg_default wm8804_reg_defaults[] = {
+ { 3, 0x21 }, /* R3 - PLL1 */
+ { 4, 0xFD }, /* R4 - PLL2 */
+ { 5, 0x36 }, /* R5 - PLL3 */
+ { 6, 0x07 }, /* R6 - PLL4 */
+ { 7, 0x16 }, /* R7 - PLL5 */
+ { 8, 0x18 }, /* R8 - PLL6 */
+ { 9, 0xFF }, /* R9 - SPDMODE */
+ { 10, 0x00 }, /* R10 - INTMASK */
+ { 18, 0x00 }, /* R18 - SPDTX1 */
+ { 19, 0x00 }, /* R19 - SPDTX2 */
+ { 20, 0x00 }, /* R20 - SPDTX3 */
+ { 21, 0x71 }, /* R21 - SPDTX4 */
+ { 22, 0x0B }, /* R22 - SPDTX5 */
+ { 23, 0x70 }, /* R23 - GPO0 */
+ { 24, 0x57 }, /* R24 - GPO1 */
+ { 26, 0x42 }, /* R26 - GPO2 */
+ { 27, 0x06 }, /* R27 - AIFTX */
+ { 28, 0x06 }, /* R28 - AIFRX */
+ { 29, 0x80 }, /* R29 - SPDRX1 */
+ { 30, 0x07 }, /* R30 - PWRDN */
+};
+
+struct wm8804_priv {
+ struct device *dev;
+ struct regmap *regmap;
+ struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES];
+ struct notifier_block disable_nb[WM8804_NUM_SUPPLIES];
+ int mclk_div;
+
+ struct gpio_desc *reset;
+
+ int aif_pwr;
+};
+
+static int txsrc_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
+
+static int wm8804_aif_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event);
+
+/*
+ * We can't use the same notifier block for more than one supply and
+ * there's no way I can see to get from a callback to the caller
+ * except container_of().
+ */
+#define WM8804_REGULATOR_EVENT(n) \
+static int wm8804_regulator_event_##n(struct notifier_block *nb, \
+ unsigned long event, void *data) \
+{ \
+ struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \
+ disable_nb[n]); \
+ if (event & REGULATOR_EVENT_DISABLE) { \
+ regcache_mark_dirty(wm8804->regmap); \
+ } \
+ return 0; \
+}
+
+WM8804_REGULATOR_EVENT(0)
+WM8804_REGULATOR_EVENT(1)
+
+static const char *txsrc_text[] = { "S/PDIF RX", "AIF" };
+static const SOC_ENUM_SINGLE_DECL(txsrc, WM8804_SPDTX4, 6, txsrc_text);
+
+static const struct snd_kcontrol_new wm8804_tx_source_mux[] = {
+ SOC_DAPM_ENUM_EXT("Input Source", txsrc,
+ snd_soc_dapm_get_enum_double, txsrc_put),
+};
+
+static const struct snd_soc_dapm_widget wm8804_dapm_widgets[] = {
+SND_SOC_DAPM_OUTPUT("SPDIF Out"),
+SND_SOC_DAPM_INPUT("SPDIF In"),
+
+SND_SOC_DAPM_PGA("SPDIFTX", WM8804_PWRDN, 2, 1, NULL, 0),
+SND_SOC_DAPM_PGA("SPDIFRX", WM8804_PWRDN, 1, 1, NULL, 0),
+
+SND_SOC_DAPM_MUX("Tx Source", SND_SOC_NOPM, 6, 0, wm8804_tx_source_mux),
+
+SND_SOC_DAPM_AIF_OUT_E("AIFTX", NULL, 0, SND_SOC_NOPM, 0, 0, wm8804_aif_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+SND_SOC_DAPM_AIF_IN_E("AIFRX", NULL, 0, SND_SOC_NOPM, 0, 0, wm8804_aif_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route wm8804_dapm_routes[] = {
+ { "AIFRX", NULL, "Playback" },
+ { "Tx Source", "AIF", "AIFRX" },
+
+ { "SPDIFRX", NULL, "SPDIF In" },
+ { "Tx Source", "S/PDIF RX", "SPDIFRX" },
+
+ { "SPDIFTX", NULL, "Tx Source" },
+ { "SPDIF Out", NULL, "SPDIFTX" },
+
+ { "AIFTX", NULL, "SPDIFRX" },
+ { "Capture", NULL, "AIFTX" },
+};
+
+static int wm8804_aif_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+ struct wm8804_priv *wm8804 = snd_soc_codec_get_drvdata(codec);
+
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ /* power up the aif */
+ if (!wm8804->aif_pwr)
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0x0);
+ wm8804->aif_pwr++;
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ /* power down only both paths are disabled */
+ wm8804->aif_pwr--;
+ if (!wm8804->aif_pwr)
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0x10);
+ break;
+ }
+
+ return 0;
+}
+
+static int txsrc_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
+ struct snd_soc_dapm_context *dapm = &codec->dapm;
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int val = ucontrol->value.enumerated.item[0] << e->shift_l;
+ unsigned int mask = 1 << e->shift_l;
+ unsigned int txpwr;
+
+ if (val != 0 && val != mask)
+ return -EINVAL;
+
+ snd_soc_dapm_mutex_lock(dapm);
+
+ if (snd_soc_test_bits(codec, e->reg, mask, val)) {
+ /* save the current power state of the transmitter */
+ txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4;
+
+ /* power down the transmitter */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4);
+
+ /* set the tx source */
+ snd_soc_update_bits(codec, e->reg, mask, val);
+
+ /* restore the transmitter's configuration */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr);
+ }
+
+ snd_soc_dapm_mutex_unlock(dapm);
+
+ return 0;
+}
+
+static bool wm8804_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case WM8804_RST_DEVID1:
+ case WM8804_DEVID2:
+ case WM8804_DEVREV:
+ case WM8804_INTSTAT:
+ case WM8804_SPDSTAT:
+ case WM8804_RXCHAN1:
+ case WM8804_RXCHAN2:
+ case WM8804_RXCHAN3:
+ case WM8804_RXCHAN4:
+ case WM8804_RXCHAN5:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int wm8804_soft_reset(struct wm8804_priv *wm8804)
+{
+ return regmap_write(wm8804->regmap, WM8804_RST_DEVID1, 0x0);
+}
+
+static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec;
+ u16 format, master, bcp, lrp;
+
+ codec = dai->codec;
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ format = 0x2;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ format = 0x0;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ format = 0x1;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ case SND_SOC_DAIFMT_DSP_B:
+ format = 0x3;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown dai format\n");
+ return -EINVAL;
+ }
+
+ /* set data format */
+ snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format);
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format);
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ master = 0;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown master/slave configuration\n");
+ return -EINVAL;
+ }
+
+ /* set master/slave mode */
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6);
+
+ bcp = lrp = 0;
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ bcp = lrp = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ bcp = 1;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ lrp = 1;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown polarity configuration\n");
+ return -EINVAL;
+ }
+
+ /* set frame inversion */
+ snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20,
+ (bcp << 4) | (lrp << 5));
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20,
+ (bcp << 4) | (lrp << 5));
+ return 0;
+}
+
+static int wm8804_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec;
+ u16 blen;
+
+ codec = dai->codec;
+
+ switch (params_width(params)) {
+ case 16:
+ blen = 0x0;
+ break;
+ case 20:
+ blen = 0x1;
+ break;
+ case 24:
+ blen = 0x2;
+ break;
+ default:
+ dev_err(dai->dev, "Unsupported word length: %u\n",
+ params_width(params));
+ return -EINVAL;
+ }
+
+ /* set word length */
+ snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2);
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2);
+
+ return 0;
+}
+
+struct pll_div {
+ u32 prescale:1;
+ u32 mclkdiv:1;
+ u32 freqmode:2;
+ u32 n:4;
+ u32 k:22;
+};
+
+/* PLL rate to output rate divisions */
+static struct {
+ unsigned int div;
+ unsigned int freqmode;
+ unsigned int mclkdiv;
+} post_table[] = {
+ { 2, 0, 0 },
+ { 4, 0, 1 },
+ { 4, 1, 0 },
+ { 8, 1, 1 },
+ { 8, 2, 0 },
+ { 16, 2, 1 },
+ { 12, 3, 0 },
+ { 24, 3, 1 }
+};
+
+#define FIXED_PLL_SIZE ((1ULL << 22) * 10)
+static int pll_factors(struct pll_div *pll_div, unsigned int target,
+ unsigned int source, unsigned int mclk_div)
+{
+ u64 Kpart;
+ unsigned long int K, Ndiv, Nmod, tmp;
+ int i;
+
+ /*
+ * Scale the output frequency up; the PLL should run in the
+ * region of 90-100MHz.
+ */
+ for (i = 0; i < ARRAY_SIZE(post_table); i++) {
+ tmp = target * post_table[i].div;
+ if ((tmp >= 90000000 && tmp <= 100000000) &&
+ (mclk_div == post_table[i].mclkdiv)) {
+ pll_div->freqmode = post_table[i].freqmode;
+ pll_div->mclkdiv = post_table[i].mclkdiv;
+ target *= post_table[i].div;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(post_table)) {
+ pr_err("%s: Unable to scale output frequency: %uHz\n",
+ __func__, target);
+ return -EINVAL;
+ }
+
+ pll_div->prescale = 0;
+ Ndiv = target / source;
+ if (Ndiv < 5) {
+ source >>= 1;
+ pll_div->prescale = 1;
+ Ndiv = target / source;
+ }
+
+ if (Ndiv < 5 || Ndiv > 13) {
+ pr_err("%s: WM8804 N value is not within the recommended range: %lu\n",
+ __func__, Ndiv);
+ return -EINVAL;
+ }
+ pll_div->n = Ndiv;
+
+ Nmod = target % source;
+ Kpart = FIXED_PLL_SIZE * (u64)Nmod;
+
+ do_div(Kpart, source);
+
+ K = Kpart & 0xffffffff;
+ if ((K % 10) >= 5)
+ K += 5;
+ K /= 10;
+ pll_div->k = K;
+
+ return 0;
+}
+
+static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
+ int source, unsigned int freq_in,
+ unsigned int freq_out)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct wm8804_priv *wm8804 = snd_soc_codec_get_drvdata(codec);
+ bool change;
+
+ if (!freq_in || !freq_out) {
+ /* disable the PLL */
+ regmap_update_bits_check(wm8804->regmap, WM8804_PWRDN,
+ 0x1, 0x1, &change);
+ if (change)
+ pm_runtime_put(wm8804->dev);
+ } else {
+ int ret;
+ struct pll_div pll_div;
+
+ ret = pll_factors(&pll_div, freq_out, freq_in,
+ wm8804->mclk_div);
+ if (ret)
+ return ret;
+
+ /* power down the PLL before reprogramming it */
+ regmap_update_bits_check(wm8804->regmap, WM8804_PWRDN,
+ 0x1, 0x1, &change);
+ if (!change)
+ pm_runtime_get_sync(wm8804->dev);
+
+ /* set PLLN and PRESCALE */
+ snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
+ pll_div.n | (pll_div.prescale << 4));
+ /* set mclkdiv and freqmode */
+ snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
+ pll_div.freqmode | (pll_div.mclkdiv << 3));
+ /* set PLLK */
+ snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
+ snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
+ snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
+
+ /* power up the PLL */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
+ }
+
+ return 0;
+}
+
+static int wm8804_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec;
+
+ codec = dai->codec;
+
+ switch (clk_id) {
+ case WM8804_TX_CLKSRC_MCLK:
+ if ((freq >= 10000000 && freq <= 14400000)
+ || (freq >= 16280000 && freq <= 27000000))
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80);
+ else {
+ dev_err(dai->dev, "OSCCLOCK is not within the "
+ "recommended range: %uHz\n", freq);
+ return -EINVAL;
+ }
+ break;
+ case WM8804_TX_CLKSRC_PLL:
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0);
+ break;
+ case WM8804_CLKOUT_SRC_CLK1:
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0);
+ break;
+ case WM8804_CLKOUT_SRC_OSCCLK:
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8);
+ break;
+ default:
+ dev_err(dai->dev, "Unknown clock source: %d\n", clk_id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int wm8804_set_clkdiv(struct snd_soc_dai *dai,
+ int div_id, int div)
+{
+ struct snd_soc_codec *codec;
+ struct wm8804_priv *wm8804;
+
+ codec = dai->codec;
+ switch (div_id) {
+ case WM8804_CLKOUT_DIV:
+ snd_soc_update_bits(codec, WM8804_PLL5, 0x30,
+ (div & 0x3) << 4);
+ break;
+ case WM8804_MCLK_DIV:
+ wm8804 = snd_soc_codec_get_drvdata(codec);
+ wm8804->mclk_div = div;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown clock divider: %d\n", div_id);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const struct snd_soc_dai_ops wm8804_dai_ops = {
+ .hw_params = wm8804_hw_params,
+ .set_fmt = wm8804_set_fmt,
+ .set_sysclk = wm8804_set_sysclk,
+ .set_clkdiv = wm8804_set_clkdiv,
+ .set_pll = wm8804_set_pll
+};
+
+#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE)
+
+#define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
+ SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
+ SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
+
+static struct snd_soc_dai_driver wm8804_dai = {
+ .name = "wm8804-spdif",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = WM8804_RATES,
+ .formats = WM8804_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = WM8804_RATES,
+ .formats = WM8804_FORMATS,
+ },
+ .ops = &wm8804_dai_ops,
+ .symmetric_rates = 1
+};
+
+static const struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
+ .idle_bias_off = true,
+
+ .dapm_widgets = wm8804_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(wm8804_dapm_widgets),
+ .dapm_routes = wm8804_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(wm8804_dapm_routes),
+};
+
+const struct regmap_config wm8804_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = WM8804_MAX_REGISTER,
+ .volatile_reg = wm8804_volatile,
+
+ .cache_type = REGCACHE_RBTREE,
+ .reg_defaults = wm8804_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(wm8804_reg_defaults),
+};
+EXPORT_SYMBOL_GPL(wm8804_regmap_config);
+
+int wm8804_probe(struct device *dev, struct regmap *regmap)
+{
+ struct wm8804_priv *wm8804;
+ unsigned int id1, id2;
+ int i, ret;
+
+ wm8804 = devm_kzalloc(dev, sizeof(*wm8804), GFP_KERNEL);
+ if (!wm8804)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, wm8804);
+
+ wm8804->dev = dev;
+ wm8804->regmap = regmap;
+
+ wm8804->reset = devm_gpiod_get_optional(dev, "wlf,reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(wm8804->reset)) {
+ ret = PTR_ERR(wm8804->reset);
+ dev_err(dev, "Failed to get reset line: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++)
+ wm8804->supplies[i].supply = wm8804_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ if (ret) {
+ dev_err(dev, "Failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0;
+ wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1;
+
+ /* This should really be moved into the regulator core */
+ for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) {
+ struct regulator *regulator = wm8804->supplies[i].consumer;
+
+ ret = devm_regulator_register_notifier(regulator,
+ &wm8804->disable_nb[i]);
+ if (ret != 0) {
+ dev_err(dev,
+ "Failed to register regulator notifier: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ if (ret) {
+ dev_err(dev, "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ if (wm8804->reset)
+ gpiod_set_value_cansleep(wm8804->reset, 1);
+
+ ret = regmap_read(regmap, WM8804_RST_DEVID1, &id1);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read device ID: %d\n", ret);
+ goto err_reg_enable;
+ }
+
+ ret = regmap_read(regmap, WM8804_DEVID2, &id2);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read device ID: %d\n", ret);
+ goto err_reg_enable;
+ }
+
+ id2 = (id2 << 8) | id1;
+
+ if (id2 != 0x8805) {
+ dev_err(dev, "Invalid device ID: %#x\n", id2);
+ ret = -EINVAL;
+ goto err_reg_enable;
+ }
+
+ ret = regmap_read(regmap, WM8804_DEVREV, &id1);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read device revision: %d\n",
+ ret);
+ goto err_reg_enable;
+ }
+ dev_info(dev, "revision %c\n", id1 + 'A');
+
+ if (!wm8804->reset) {
+ ret = wm8804_soft_reset(wm8804);
+ if (ret < 0) {
+ dev_err(dev, "Failed to issue reset: %d\n", ret);
+ goto err_reg_enable;
+ }
+ }
+
+ ret = snd_soc_register_codec(dev, &soc_codec_dev_wm8804,
+ &wm8804_dai, 1);
+ if (ret < 0) {
+ dev_err(dev, "Failed to register CODEC: %d\n", ret);
+ goto err_reg_enable;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_idle(dev);
+
+ return 0;
+
+err_reg_enable:
+ regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(wm8804_probe);
+
+void wm8804_remove(struct device *dev)
+{
+ pm_runtime_disable(dev);
+ snd_soc_unregister_codec(dev);
+}
+EXPORT_SYMBOL_GPL(wm8804_remove);
+
+#if IS_ENABLED(CONFIG_PM)
+static int wm8804_runtime_resume(struct device *dev)
+{
+ struct wm8804_priv *wm8804 = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ if (ret) {
+ dev_err(wm8804->dev, "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ regcache_sync(wm8804->regmap);
+
+ /* Power up OSCCLK */
+ regmap_update_bits(wm8804->regmap, WM8804_PWRDN, 0x8, 0x0);
+
+ return 0;
+}
+
+static int wm8804_runtime_suspend(struct device *dev)
+{
+ struct wm8804_priv *wm8804 = dev_get_drvdata(dev);
+
+ /* Power down OSCCLK */
+ regmap_update_bits(wm8804->regmap, WM8804_PWRDN, 0x8, 0x8);
+
+ regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+
+ return 0;
+}
+#endif
+
+const struct dev_pm_ops wm8804_pm = {
+ SET_RUNTIME_PM_OPS(wm8804_runtime_suspend, wm8804_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_GPL(wm8804_pm);
+
+MODULE_DESCRIPTION("ASoC WM8804 driver");
+MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff