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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-10-01 17:46:18 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-02 04:24:09 -0400
commit0c5d1eb77a8be917b638344a22afe1398236482b (patch)
tree57d57c9b270cc10428f818cfec9725a1344b78ce /kernel/irq/internals.h
parentd6d5aeb661fc14655c417f3582ae7ec52985d2a8 (diff)
genirq: record trigger type
Genirq hasn't previously recorded the trigger type used by any given IRQ, although some irq_chip support has done so. That data can be useful when troubleshooting. This patch records it in the relevant irq_desc.status bits, and improves consistency between the two driver-visible calls affected: - Make set_irq_type() usage match request_irq() usage: * IRQ_TYPE_NONE should be a NOP; succeed, so irq_chip methods won't have to handle that case any more (many do it wrong). * IRQ_TYPE_PROBE is ignored; any buggy out-of-tree callers might need to switch over to the real IRQ probing code. * emit the same diagnostics (from shared utility code) - Their kerneldoc now reflects usage: * request_irq() flags include IRQF_TRIGGER_* to specify active edge(s)/level ... docs previously omitted that * set_irq_type() is declared in <linux/irq.h> so callers should use the (bit-equivalent) IRQ_TYPE_* symbols there Also: adds a warning about shared IRQs that don't end up using the requested trigger mode; and fix an unrelated "sparse" warning. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq/internals.h')
-rw-r--r--kernel/irq/internals.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 08a849a22447..422dd00c8bd3 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -10,6 +10,9 @@ extern void irq_chip_set_defaults(struct irq_chip *chip);
10/* Set default handler: */ 10/* Set default handler: */
11extern void compat_irq_chip_set_default_handler(struct irq_desc *desc); 11extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
12 12
13extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
14 unsigned long flags);
15
13#ifdef CONFIG_PROC_FS 16#ifdef CONFIG_PROC_FS
14extern void register_irq_proc(unsigned int irq); 17extern void register_irq_proc(unsigned int irq);
15extern void register_handler_proc(unsigned int irq, struct irqaction *action); 18extern void register_handler_proc(unsigned int irq, struct irqaction *action);