Re: passing two interrupts two an I2C driver

[Pawel Moll <pawel.moll@arm.com>]

On Wed, 2013-08-21 at 18:54 +0100, Mark Brown wrote:
> On Wed, Aug 21, 2013 at 01:37:04PM +0100, Pawel Moll wrote:
> 
> > So let me ask such question... If Device Tree didn't exist, how would
> > you make drive such device? I guess it would require some custom code,
> 
> It's always done using platform data, same for SPI - if we update one we
> should probably update both.

If the platform data used to carry the (custom) irq data, the DT-powered
driver could interrogate the DT on is own, couldn't it? Of course there
should be some helper available, maybe something of that sort? (warning,
untested)

8<---------------------
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 1264923..d2a02dd 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -46,6 +46,15 @@ unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
 }
 EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
 
+unsigned int irq_of_parse_and_map_by_name(struct device_node *dev,
+		const char *name)
+{
+	int index = of_property_match_string(dev, "interrupt-names", name);
+
+	return index < 0 ? 0 : irq_of_parse_and_map(dev, index);
+}
+EXPORT_SYMBOL_GPL(irq_of_parse_and_map_by_name);
+
 /**
  * of_irq_find_parent - Given a device node, find its interrupt parent node
  * @child: pointer to device node
8<---------------------

Pawel