path: root/include/linux/of_irq.h
diff options
authorRob Herring <robh@kernel.org>2014-04-23 17:57:41 -0500
committerGrant Likely <grant.likely@linaro.org>2014-04-24 21:40:22 +0100
commit9ec36cafe43bf835f8f29273597a5b0cbc8267ef (patch)
tree3a4d486b89eb7bf3ddd0f2efd070ebf38e98c994 /include/linux/of_irq.h
parent82c0f5897a8708dbf7abe08e49efd9a4a8d8cd3a (diff)
of/irq: do irq resolution in platform_get_irq
Currently we get the following kind of errors if we try to use interrupt phandles to irqchips that have not yet initialized: irq: no irq domain found for /ocp/pinmux@48002030 ! ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at drivers/of/platform.c:171 of_device_alloc+0x144/0x184() Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.12.0-00038-g42a9708 #1012 (show_stack+0x14/0x1c) (dump_stack+0x6c/0xa0) (warn_slowpath_common+0x64/0x84) (warn_slowpath_null+0x1c/0x24) (of_device_alloc+0x144/0x184) (of_platform_device_create_pdata+0x44/0x9c) (of_platform_bus_create+0xd0/0x170) (of_platform_bus_create+0x12c/0x170) (of_platform_populate+0x60/0x98) This is because we're wrongly trying to populate resources that are not yet available. It's perfectly valid to create irqchips dynamically, so let's fix up the issue by resolving the interrupt resources when platform_get_irq is called. And then we also need to accept the fact that some irqdomains do not exist that early on, and only get initialized later on. So we can make the current WARN_ON into just into a pr_debug(). We still attempt to populate irq resources when we create the devices. This allows current drivers which don't use platform_get_irq to continue to function. Once all drivers are fixed, this code can be removed. Suggested-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Tested-by: Tony Lindgren <tony@atomide.com> Cc: stable@vger.kernel.org # v3.10+ Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'include/linux/of_irq.h')
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index 3f23b4472c31..6404253d810d 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -44,11 +44,16 @@ extern void of_irq_init(const struct of_device_id *matches);
extern int of_irq_count(struct device_node *dev);
+extern int of_irq_get(struct device_node *dev, int index);
static inline int of_irq_count(struct device_node *dev)
return 0;
+static inline int of_irq_get(struct device_node *dev, int index)
+ return 0;
#if defined(CONFIG_OF)