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Diffstat (limited to 'sound/soc/codecs/wm8995.c')
-rw-r--r--sound/soc/codecs/wm8995.c103
1 files changed, 98 insertions, 5 deletions
diff --git a/sound/soc/codecs/wm8995.c b/sound/soc/codecs/wm8995.c
index 608c84c5aa8e..67eaaecbb42e 100644
--- a/sound/soc/codecs/wm8995.c
+++ b/sound/soc/codecs/wm8995.c
@@ -19,6 +19,7 @@
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -30,6 +31,18 @@
#include "wm8995.h"
+#define WM8995_NUM_SUPPLIES 8
+static const char *wm8995_supply_names[WM8995_NUM_SUPPLIES] = {
+ "DCVDD",
+ "DBVDD1",
+ "DBVDD2",
+ "DBVDD3",
+ "AVDD1",
+ "AVDD2",
+ "CPVDD",
+ "MICVDD"
+};
+
static const u16 wm8995_reg_defs[WM8995_MAX_REGISTER + 1] = {
[0] = 0x8995, [5] = 0x0100, [16] = 0x000b, [17] = 0x000b,
[24] = 0x02c0, [25] = 0x02c0, [26] = 0x02c0, [27] = 0x02c0,
@@ -126,8 +139,37 @@ struct wm8995_priv {
int mclk[2];
int aifclk[2];
struct fll_config fll[2], fll_suspend[2];
+ struct regulator_bulk_data supplies[WM8995_NUM_SUPPLIES];
+ struct notifier_block disable_nb[WM8995_NUM_SUPPLIES];
+ struct snd_soc_codec *codec;
};
+/*
+ * 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 WM8995_REGULATOR_EVENT(n) \
+static int wm8995_regulator_event_##n(struct notifier_block *nb, \
+ unsigned long event, void *data) \
+{ \
+ struct wm8995_priv *wm8995 = container_of(nb, struct wm8995_priv, \
+ disable_nb[n]); \
+ if (event & REGULATOR_EVENT_DISABLE) { \
+ wm8995->codec->cache_sync = 1; \
+ } \
+ return 0; \
+}
+
+WM8995_REGULATOR_EVENT(0)
+WM8995_REGULATOR_EVENT(1)
+WM8995_REGULATOR_EVENT(2)
+WM8995_REGULATOR_EVENT(3)
+WM8995_REGULATOR_EVENT(4)
+WM8995_REGULATOR_EVENT(5)
+WM8995_REGULATOR_EVENT(6)
+WM8995_REGULATOR_EVENT(7)
+
static const DECLARE_TLV_DB_SCALE(digital_tlv, -7200, 75, 1);
static const DECLARE_TLV_DB_SCALE(in1lr_pga_tlv, -1650, 150, 0);
static const DECLARE_TLV_DB_SCALE(in1l_boost_tlv, 0, 600, 0);
@@ -909,7 +951,7 @@ static const struct snd_soc_dapm_route wm8995_intercon[] = {
{ "SPK2R", NULL, "SPK2R Driver" }
};
-static int wm8995_volatile(unsigned int reg)
+static int wm8995_volatile(struct snd_soc_codec *codec, unsigned int reg)
{
/* out of bounds registers are generally considered
* volatile to support register banks that are partially
@@ -1483,6 +1525,11 @@ static int wm8995_set_bias_level(struct snd_soc_codec *codec,
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8995->supplies),
+ wm8995->supplies);
+ if (ret)
+ return ret;
+
ret = snd_soc_cache_sync(codec);
if (ret) {
dev_err(codec->dev,
@@ -1492,12 +1539,13 @@ static int wm8995_set_bias_level(struct snd_soc_codec *codec,
snd_soc_update_bits(codec, WM8995_POWER_MANAGEMENT_1,
WM8995_BG_ENA_MASK, WM8995_BG_ENA);
-
}
break;
case SND_SOC_BIAS_OFF:
snd_soc_update_bits(codec, WM8995_POWER_MANAGEMENT_1,
WM8995_BG_ENA_MASK, 0);
+ regulator_bulk_disable(ARRAY_SIZE(wm8995->supplies),
+ wm8995->supplies);
break;
}
@@ -1536,10 +1584,12 @@ static int wm8995_remove(struct snd_soc_codec *codec)
static int wm8995_probe(struct snd_soc_codec *codec)
{
struct wm8995_priv *wm8995;
+ int i;
int ret;
codec->dapm.idle_bias_off = 1;
wm8995 = snd_soc_codec_get_drvdata(codec);
+ wm8995->codec = codec;
ret = snd_soc_codec_set_cache_io(codec, 16, 16, wm8995->control_type);
if (ret < 0) {
@@ -1547,21 +1597,58 @@ static int wm8995_probe(struct snd_soc_codec *codec)
return ret;
}
+ for (i = 0; i < ARRAY_SIZE(wm8995->supplies); i++)
+ wm8995->supplies[i].supply = wm8995_supply_names[i];
+
+ ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8995->supplies),
+ wm8995->supplies);
+ if (ret) {
+ dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ wm8995->disable_nb[0].notifier_call = wm8995_regulator_event_0;
+ wm8995->disable_nb[1].notifier_call = wm8995_regulator_event_1;
+ wm8995->disable_nb[2].notifier_call = wm8995_regulator_event_2;
+ wm8995->disable_nb[3].notifier_call = wm8995_regulator_event_3;
+ wm8995->disable_nb[4].notifier_call = wm8995_regulator_event_4;
+ wm8995->disable_nb[5].notifier_call = wm8995_regulator_event_5;
+ wm8995->disable_nb[6].notifier_call = wm8995_regulator_event_6;
+ wm8995->disable_nb[7].notifier_call = wm8995_regulator_event_7;
+
+ /* This should really be moved into the regulator core */
+ for (i = 0; i < ARRAY_SIZE(wm8995->supplies); i++) {
+ ret = regulator_register_notifier(wm8995->supplies[i].consumer,
+ &wm8995->disable_nb[i]);
+ if (ret) {
+ dev_err(codec->dev,
+ "Failed to register regulator notifier: %d\n",
+ ret);
+ }
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8995->supplies),
+ wm8995->supplies);
+ if (ret) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+ goto err_reg_get;
+ }
+
ret = snd_soc_read(codec, WM8995_SOFTWARE_RESET);
if (ret < 0) {
dev_err(codec->dev, "Failed to read device ID: %d\n", ret);
- return ret;
+ goto err_reg_enable;
}
if (ret != 0x8995) {
dev_err(codec->dev, "Invalid device ID: %#x\n", ret);
- return -EINVAL;
+ goto err_reg_enable;
}
ret = snd_soc_write(codec, WM8995_SOFTWARE_RESET, 0);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
- return ret;
+ goto err_reg_enable;
}
wm8995_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
@@ -1596,6 +1683,12 @@ static int wm8995_probe(struct snd_soc_codec *codec)
ARRAY_SIZE(wm8995_intercon));
return 0;
+
+err_reg_enable:
+ regulator_bulk_disable(ARRAY_SIZE(wm8995->supplies), wm8995->supplies);
+err_reg_get:
+ regulator_bulk_free(ARRAY_SIZE(wm8995->supplies), wm8995->supplies);
+ return ret;
}
#define WM8995_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 18:50:05 +0100