1 files changed, 29 insertions, 7 deletions

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index c428d9f918f..07101e9e1cb 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -321,7 +321,6 @@ EXPORT_SYMBOL_GPL(wm831x_set_bits);
  */
 int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
 {
-	int tries = 10;
 	int ret, src;
 
 	mutex_lock(&wm831x->auxadc_lock);
@@ -349,13 +348,14 @@ int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
 		goto disable;
 	}
 
-	do {
-		msleep(1);
+	/* Ignore the result to allow us to soldier on without IRQ hookup */
+	wait_for_completion_timeout(&wm831x->auxadc_done, msecs_to_jiffies(5));
 
-		ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
-		if (ret < 0)
-			ret = WM831X_AUX_CVT_ENA;
-	} while ((ret & WM831X_AUX_CVT_ENA) && --tries);
+	ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
+	if (ret < 0) {
+		dev_err(wm831x->dev, "AUXADC status read failed: %d\n", ret);
+		goto disable;
+	}
 
 	if (ret & WM831X_AUX_CVT_ENA) {
 		dev_err(wm831x->dev, "Timed out reading AUXADC\n");
@@ -390,6 +390,15 @@ out:
 }
 EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
 
+static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
+{
+	struct wm831x *wm831x = irq_data;
+
+	complete(&wm831x->auxadc_done);
+
+	return IRQ_HANDLED;
+}
+
 /**
  * wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
  *
@@ -1411,6 +1420,7 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
 	mutex_init(&wm831x->io_lock);
 	mutex_init(&wm831x->key_lock);
 	mutex_init(&wm831x->auxadc_lock);
+	init_completion(&wm831x->auxadc_done);
 	dev_set_drvdata(wm831x->dev, wm831x);
 
 	ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
@@ -1523,6 +1533,16 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
 	if (ret != 0)
 		goto err;
 
+	if (wm831x->irq_base) {
+		ret = request_threaded_irq(wm831x->irq_base +
+					   WM831X_IRQ_AUXADC_DATA,
+					   NULL, wm831x_auxadc_irq, 0,
+					   "auxadc", wm831x);
+		if (ret < 0)
+			dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
+				ret);
+	}
+
 	/* The core device is up, instantiate the subdevices. */
 	switch (parent) {
 	case WM8310:
@@ -1593,6 +1613,8 @@ static void wm831x_device_exit(struct wm831x *wm831x)
 {
 	wm831x_otp_exit(wm831x);
 	mfd_remove_devices(wm831x->dev);
+	if (wm831x->irq_base)
+		free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
 	wm831x_irq_exit(wm831x);
 	kfree(wm831x);
 }