ASoC: tlv320aic31xx: Add short circuit detection support

These devices support detecting and reporting short circuits across
the output stages. Add support for reporting these issue. Do this
by registering an interrupt if available and enabling this error
to trigger that interrupt in the device.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index bf92d36..2abe51d 100644 (file)
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -167,6 +167,7 @@ struct aic31xx_priv {
        u8 p_div;
        int rate_div_line;
        bool master_dapm_route_applied;
+       int irq;
 };
 
 struct aic31xx_rate_divs {
@@ -1391,6 +1392,40 @@ static const struct acpi_device_id aic31xx_acpi_match[] = {
 MODULE_DEVICE_TABLE(acpi, aic31xx_acpi_match);
 #endif
 
+static irqreturn_t aic31xx_irq(int irq, void *data)
+{
+       struct aic31xx_priv *aic31xx = data;
+       struct device *dev = aic31xx->dev;
+       unsigned int value;
+       bool handled = false;
+       int ret;
+
+       ret = regmap_read(aic31xx->regmap, AIC31XX_INTRDACFLAG, &value);
+       if (ret) {
+               dev_err(dev, "Failed to read interrupt mask: %d\n", ret);
+               goto exit;
+       }
+
+       if (value)
+               handled = true;
+       else
+               goto exit;
+
+       if (value & AIC31XX_HPLSCDETECT)
+               dev_err(dev, "Short circuit on Left output is detected\n");
+       if (value & AIC31XX_HPRSCDETECT)
+               dev_err(dev, "Short circuit on Right output is detected\n");
+       if (value & ~(AIC31XX_HPLSCDETECT |
+                     AIC31XX_HPRSCDETECT))
+               dev_err(dev, "Unknown DAC interrupt flags: 0x%08x\n", value);
+
+exit:
+       if (handled)
+               return IRQ_HANDLED;
+       else
+               return IRQ_NONE;
+}
+
 static int aic31xx_i2c_probe(struct i2c_client *i2c,
                             const struct i2c_device_id *id)
 {
@@ -1413,6 +1448,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
                return ret;
        }
        aic31xx->dev = &i2c->dev;
+       aic31xx->irq = i2c->irq;
 
        aic31xx->codec_type = id->driver_data;
 
@@ -1456,6 +1492,25 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
                return ret;
        }
 
+       if (aic31xx->irq > 0) {
+               regmap_update_bits(aic31xx->regmap, AIC31XX_GPIO1,
+                                  AIC31XX_GPIO1_FUNC_MASK,
+                                  AIC31XX_GPIO1_INT1 <<
+                                  AIC31XX_GPIO1_FUNC_SHIFT);
+
+               regmap_write(aic31xx->regmap, AIC31XX_INT1CTRL,
+                            AIC31XX_SC);
+
+               ret = devm_request_threaded_irq(aic31xx->dev, aic31xx->irq,
+                                               NULL, aic31xx_irq,
+                                               IRQF_ONESHOT, "aic31xx-irq",
+                                               aic31xx);
+               if (ret) {
+                       dev_err(aic31xx->dev, "Unable to request IRQ\n");
+                       return ret;
+               }
+       }
+
        if (aic31xx->codec_type & DAC31XX_BIT)
                return devm_snd_soc_register_component(&i2c->dev,
                                &soc_codec_driver_aic31xx,

diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index 0b58758..52e1719 100644 (file)
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -191,6 +191,22 @@ struct aic31xx_pdata {
 #define AIC31XX_SC                     BIT(3)
 #define AIC31XX_ENGINE                 BIT(2)
 
+/* AIC31XX_GPIO1 */
+#define AIC31XX_GPIO1_FUNC_MASK                GENMASK(5, 2)
+#define AIC31XX_GPIO1_FUNC_SHIFT       2
+#define AIC31XX_GPIO1_DISABLED         0x00
+#define AIC31XX_GPIO1_INPUT            0x01
+#define AIC31XX_GPIO1_GPI              0x02
+#define AIC31XX_GPIO1_GPO              0x03
+#define AIC31XX_GPIO1_CLKOUT           0x04
+#define AIC31XX_GPIO1_INT1             0x05
+#define AIC31XX_GPIO1_INT2             0x06
+#define AIC31XX_GPIO1_ADC_WCLK         0x07
+#define AIC31XX_GPIO1_SBCLK            0x08
+#define AIC31XX_GPIO1_SWCLK            0x09
+#define AIC31XX_GPIO1_ADC_MOD_CLK      0x10
+#define AIC31XX_GPIO1_SDOUT            0x11
+
 /* AIC31XX_DACSETUP */
 #define AIC31XX_SOFTSTEP_MASK          GENMASK(1, 0)