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ASoC: Initial WM8962 IRQ support 

Provide an initial hookup for interrupts on the WM8962. Currently we simply
report error status via log messages if an IRQ is provided for the device.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-09-28 16:01:20 -07:00
parent ea738bade2
commit 45e655047f
2 changed files with 61 additions and 1 deletions
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2
include/sound/wm8962.h
View File

@ -17,6 +17,8 @@
struct wm8962_pdata { struct wm8962_pdata {
u32 gpio_init[WM8962_MAX_GPIO]; u32 gpio_init[WM8962_MAX_GPIO];
bool irq_active_low;
bool spk_mono; /* Speaker outputs tied together as mono */ bool spk_mono; /* Speaker outputs tied together as mono */
}; };

60
sound/soc/codecs/wm8962.c
View File

@ -1461,6 +1461,29 @@ static struct snd_soc_dai_driver wm8962_dai = {
.symmetric_rates = 1, .symmetric_rates = 1,
}; };
static irqreturn_t wm8962_irq(int irq, void *data)
{
struct snd_soc_codec *codec = data;
int mask;
int active;
mask = snd_soc_read(codec, WM8962_INTERRUPT_STATUS_2);
active = snd_soc_read(codec, WM8962_INTERRUPT_STATUS_2);
active &= ~mask;
if (active & WM8962_FIFOS_ERR_EINT)
dev_err(codec->dev, "FIFO error\n");
if (active & WM8962_TEMP_SHUT_EINT)
dev_crit(codec->dev, "Thermal shutdown\n");
/* Acknowledge the interrupts */
snd_soc_write(codec, WM8962_INTERRUPT_STATUS_2, active);
return IRQ_HANDLED;
}
#ifdef CONFIG_PM #ifdef CONFIG_PM
static int wm8962_resume(struct snd_soc_codec *codec) static int wm8962_resume(struct snd_soc_codec *codec)
{ {
@ -1632,7 +1655,9 @@ static int wm8962_probe(struct snd_soc_codec *codec)
int ret; int ret;
struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec); struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec);
struct wm8962_pdata *pdata = dev_get_platdata(codec->dev); struct wm8962_pdata *pdata = dev_get_platdata(codec->dev);
int i; struct i2c_client *i2c = container_of(codec->dev, struct i2c_client,
dev);
int i, trigger, irq_pol;
wm8962->codec = codec; wm8962->codec = codec;
@ -1748,6 +1773,34 @@ static int wm8962_probe(struct snd_soc_codec *codec)
wm8962_init_beep(codec); wm8962_init_beep(codec);
if (i2c->irq) {
if (pdata && pdata->irq_active_low) {
trigger = IRQF_TRIGGER_LOW;
irq_pol = WM8962_IRQ_POL;
} else {
trigger = IRQF_TRIGGER_HIGH;
irq_pol = 0;
}
snd_soc_update_bits(codec, WM8962_INTERRUPT_CONTROL,
WM8962_IRQ_POL, irq_pol);
ret = request_threaded_irq(i2c->irq, NULL, wm8962_irq,
trigger | IRQF_ONESHOT,
"wm8962", codec);
if (ret != 0) {
dev_err(codec->dev, "Failed to request IRQ %d: %d\n",
i2c->irq, ret);
/* Non-fatal */
} else {
/* Enable error reporting IRQs by default */
snd_soc_update_bits(codec,
WM8962_INTERRUPT_STATUS_2_MASK,
WM8962_TEMP_SHUT_EINT |
WM8962_FIFOS_ERR_EINT, 0);
}
}
return 0; return 0;
err_enable: err_enable:
@ -1762,8 +1815,13 @@ err:
static int wm8962_remove(struct snd_soc_codec *codec) static int wm8962_remove(struct snd_soc_codec *codec)
{ {
struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec); struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec);
struct i2c_client *i2c = container_of(codec->dev, struct i2c_client,
dev);
int i; int i;
if (i2c->irq)
free_irq(i2c->irq, codec);
wm8962_free_beep(codec); wm8962_free_beep(codec);
for (i = 0; i < ARRAY_SIZE(wm8962->supplies); i++) for (i = 0; i < ARRAY_SIZE(wm8962->supplies); i++)
regulator_unregister_notifier(wm8962->supplies[i].consumer, regulator_unregister_notifier(wm8962->supplies[i].consumer,