[PATCH 6/6] mfd: qcom-pm8008: Tolerate missing interrupt

[Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>]

From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

PM8010 is often wired up with the interrupt pin tied to ground. Only
register the IRQ infrastructure if we have a parent irq.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Co-developed-by: Dhruvin Rajpura <drajpura@qti.qualcomm.com>
Signed-off-by: Dhruvin Rajpura <drajpura@qti.qualcomm.com>
Co-developed-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
---
 drivers/mfd/qcom-pm8008.c | 45 ++++++++++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 21 deletions(-)

diff --git a/drivers/mfd/qcom-pm8008.c b/drivers/mfd/qcom-pm8008.c
index ed656f0d6df2..77e4f6c04ac7 100644
--- a/drivers/mfd/qcom-pm8008.c
+++ b/drivers/mfd/qcom-pm8008.c
@@ -233,7 +233,7 @@ static void devm_irq_domain_fwnode_release(void *data)
 
 static int pm8008_probe(struct i2c_client *client)
 {
-	struct regmap_irq_chip_data *irq_data;
+	struct regmap_irq_chip_data *irq_data = NULL;
 	const struct pm8008_match_data *data;
 	struct device *dev = &client->dev;
 	struct regmap *regmap, *regmap2;
@@ -277,33 +277,36 @@ static int pm8008_probe(struct i2c_client *client)
 	 */
 	usleep_range(1000, 2000);
 
-	name = devm_kasprintf(dev, GFP_KERNEL, "%pOF-internal", dev->of_node);
-	if (!name)
-		return -ENOMEM;
+	if (client->irq) {
+		name = devm_kasprintf(dev, GFP_KERNEL, "%pOF-internal", dev->of_node);
+		if (!name)
+			return -ENOMEM;
 
-	name = strreplace(name, '/', ':');
+		name = strreplace(name, '/', ':');
 
-	fwnode = irq_domain_alloc_named_fwnode(name);
-	if (!fwnode)
-		return -ENOMEM;
+		fwnode = irq_domain_alloc_named_fwnode(name);
+		if (!fwnode)
+			return -ENOMEM;
 
-	ret = devm_add_action_or_reset(dev, devm_irq_domain_fwnode_release, fwnode);
-	if (ret)
-		return ret;
+		ret = devm_add_action_or_reset(dev, devm_irq_domain_fwnode_release, fwnode);
+		if (ret)
+			return ret;
 
-	ret = devm_regmap_add_irq_chip_fwnode(dev, fwnode, regmap, client->irq,
-				IRQF_SHARED, 0, data->irq_chip_desc, &irq_data);
-	if (ret) {
-		dev_err(dev, "failed to add IRQ chip: %d\n", ret);
-		return ret;
-	}
+		ret = devm_regmap_add_irq_chip_fwnode(dev, fwnode, regmap, client->irq,
+						      IRQF_SHARED, 0, data->irq_chip_desc,
+						      &irq_data);
+		if (ret) {
+			dev_err(dev, "failed to add IRQ chip: %d\n", ret);
+			return ret;
+		}
 
-	/* Needed by GPIO driver. */
-	dev_set_drvdata(dev, regmap_irq_get_domain(irq_data));
+		/* Needed by GPIO driver. */
+		dev_set_drvdata(dev, regmap_irq_get_domain(irq_data));
+	}
 
 	return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, data->mfd_cells,
-				data->num_mfd_cells, NULL, 0,
-				regmap_irq_get_domain(irq_data));
+				    data->num_mfd_cells, NULL, 0,
+				    regmap_irq_get_domain(irq_data));
 }
 
 static const struct pm8008_match_data pm8008_data = {

-- 
2.43.0