asoc: wcd937x: clear interrupts using regmap irq framework

Add proper way to clear interrupts using regmap irq framework,
to avoid mismatch between interrupts handled and interrupts
cleared. wcd937x requires writing '1' and then '0' to clear
interrupt. Set a new regmap irq flag 'clear_ack' to indicate this.

Change-Id: I1346dc66735d3b5788e1cc0cfef772c9deacbfc1
Signed-off-by: Ramprasad Katkam <katkam@codeaurora.org>

asoc/codecs/wcd937x/wcd937x.c

@@ -81,6 +81,9 @@ static struct regmap_irq_chip wcd937x_regmap_irq_chip = {
 	.num_regs = 3,
 	.status_base = WCD937X_DIGITAL_INTR_STATUS_0,
 	.mask_base = WCD937X_DIGITAL_INTR_MASK_0,
+	.ack_base = WCD937X_DIGITAL_INTR_CLEAR_0,
+	.use_ack = 1,
+	.clear_ack = 1,
 	.type_base = WCD937X_DIGITAL_INTR_LEVEL_0,
 	.runtime_pm = false,
 	.handle_post_irq = wcd937x_handle_post_irq,
@@ -89,35 +92,14 @@ static struct regmap_irq_chip wcd937x_regmap_irq_chip = {
 static int wcd937x_handle_post_irq(void *data)
 {
 	struct wcd937x_priv *wcd937x = data;
-	int val = 0;
-	struct wcd937x_pdata *pdata = NULL;
+	u32 status1 = 0, status2 = 0, status3 = 0;
+
+	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_0, &status1);
+	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_1, &status2);
+	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_2, &status3);
 
-	pdata = dev_get_platdata(wcd937x->dev);
-
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_0, &val);
-	dev_dbg(wcd937x->dev, "%s Clear OCP interupts\n", __func__);
-	regmap_write(wcd937x->regmap,
-			   WCD937X_DIGITAL_INTR_CLEAR_0, 0xFF);
-	regmap_write(wcd937x->regmap,
-			   WCD937X_DIGITAL_INTR_CLEAR_0, 0x0);
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_1, &val);
-	dev_dbg(wcd937x->dev, "%s Clear SCD interupts\n", __func__);
-	regmap_write(wcd937x->regmap,
-			   WCD937X_DIGITAL_INTR_CLEAR_1, 0xFF);
-	regmap_write(wcd937x->regmap,
-			   WCD937X_DIGITAL_INTR_CLEAR_1, 0x0);
-
-	regmap_write(wcd937x->regmap,
-			   WCD937X_DIGITAL_INTR_CLEAR_2, 0xFF);
-	regmap_write(wcd937x->regmap,
-			   WCD937X_DIGITAL_INTR_CLEAR_2, 0x0);
-
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_0, &val);
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_1, &val);
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_2, &val);
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_CLEAR_0, &val);
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_CLEAR_1, &val);
-	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_CLEAR_2, &val);
+	wcd937x->tx_swr_dev->slave_irq_pending =
+			((status1 || status2 || status3) ? true : false);
 
 	return IRQ_HANDLED;
 }