From d61e2944b6364006e3d7a0152aaafda741c8c876 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 26 Feb 2018 17:50:43 +0200 Subject: genirq: Add wakeup sysfs node to show IRQ wakeup state Surprisingly there is no simple way to see if the IRQ line in question is wakeup source or not. Note that wakeup might be an OOB (out-of-band) source like GPIO line which makes things slightly more complicated. Add a sysfs node to cover this case. Signed-off-by: Andy Shevchenko Signed-off-by: Thomas Gleixner Tested-by: Tony Lindgren Cc: Grygorii Strashko Cc: "Rafael J . Wysocki" Link: https://lkml.kernel.org/r/20180226155043.67937-1-andriy.shevchenko@linux.intel.com --- kernel/irq/irqdesc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'kernel') diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 49b54e9979cc..d9ded088d336 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -210,6 +210,22 @@ static ssize_t type_show(struct kobject *kobj, } IRQ_ATTR_RO(type); +static ssize_t wakeup_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct irq_desc *desc = container_of(kobj, struct irq_desc, kobj); + ssize_t ret = 0; + + raw_spin_lock_irq(&desc->lock); + ret = sprintf(buf, "%s\n", + irqd_is_wakeup_set(&desc->irq_data) ? "enabled" : "disabled"); + raw_spin_unlock_irq(&desc->lock); + + return ret; + +} +IRQ_ATTR_RO(wakeup); + static ssize_t name_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { @@ -253,6 +269,7 @@ static struct attribute *irq_attrs[] = { &chip_name_attr.attr, &hwirq_attr.attr, &type_attr.attr, + &wakeup_attr.attr, &name_attr.attr, &actions_attr.attr, NULL -- cgit v1.2.3