linux-kernel - [PATCH 1/1] device property: Add fwnode_irq_get_by

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Date:   Sat,  6 Nov 2021 23:09:09 +0530
From:   Puranjay Mohan <puranjay12@...il.com>
To:     gregkh@...uxfoundation.org, rafael@...nel.org,
        linux-kernel@...r.kernel.org, jic23@...nel.org,
        linux-iio@...r.kernel.org
Cc:     Puranjay Mohan <puranjay12@...il.com>
Subject: [PATCH 1/1] device property: Add fwnode_irq_get_by_name

The fwnode framework did not have means to obtain the IRQ number from
the name of a node.
Add that now, in form of the fwnode_irq_get_by_name() function.

Signed-off-by: Puranjay Mohan <puranjay12@...il.com>
---
 drivers/base/property.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index f1f35b48ab8b..627e4e6d3ebd 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -958,6 +958,30 @@ int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index)
 }
 EXPORT_SYMBOL(fwnode_irq_get);
 
+/**
+ * fwnode_irq_get_by_name - Get IRQ directly from its name.
+ * @fwnode:    Pointer to the firmware node
+ * @name:      IRQ Name
+ *
+ * Returns Linux IRQ number on success. Other values are determined
+ * accordingly to acpi_/of_ irq_get() operation.
+ */
+int fwnode_irq_get_by_name(const struct fwnode_handle *fwnode, const char *name)
+{
+	int index;
+
+	if (unlikely(!name))
+		return -EINVAL;
+
+	index = of_property_match_string(to_of_node(fwnode), "interrupt-names",
+					 name);
+	if (index < 0)
+		return index;
+
+	return fwnode_irq_get(fwnode, index);
+}
+EXPORT_SYMBOL(fwnode_irq_get_by_name);
+
 /**
  * fwnode_graph_get_next_endpoint - Get next endpoint firmware node
  * @fwnode: Pointer to the parent firmware node
-- 
2.30.1