From 45e655047fd64ba7eb52d14ef5acc41763c8ea34 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 28 Sep 2010 16:01:20 -0700 Subject: 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 Acked-by: Liam Girdwood --- sound/soc/codecs/wm8962.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-) (limited to 'sound') diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c index 8e5f46691379..4fa5de873c8b 100644 --- a/sound/soc/codecs/wm8962.c +++ b/sound/soc/codecs/wm8962.c @@ -1461,6 +1461,29 @@ static struct snd_soc_dai_driver wm8962_dai = { .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 static int wm8962_resume(struct snd_soc_codec *codec) { @@ -1632,7 +1655,9 @@ static int wm8962_probe(struct snd_soc_codec *codec) int ret; struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec); 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; @@ -1748,6 +1773,34 @@ static int wm8962_probe(struct snd_soc_codec *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; err_enable: @@ -1762,8 +1815,13 @@ err: static int wm8962_remove(struct snd_soc_codec *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; + if (i2c->irq) + free_irq(i2c->irq, codec); + wm8962_free_beep(codec); for (i = 0; i < ARRAY_SIZE(wm8962->supplies); i++) regulator_unregister_notifier(wm8962->supplies[i].consumer, -- cgit v1.2.2