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irqdomain: Let irq_domain_mapping display ACPI fwnode attributes 

If the system is using ACPI, there is no of_node to display. But ACPI can
use a struct irqchip_fwid as a domain identifier, and it can be used to
display the name contained in that structure.

The output on such a system will look like this:

 pMSI      0           0           0  irqchip@00000000e1180000
 MSI      37           0           0  irqchip@00000000e1180000
 GICv2m   37           0           0  irqchip@00000000e1180000
 GICv2   448         448           0  irqchip@ffff000008003000

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/20170512115538.10767-3-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Marc Zyngier 2017-05-12 12:55:36 +01:00 committed by Thomas Gleixner
parent fe17a42e70
commit 2370c00dc7
1 changed files with 12 additions and 1 deletions
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13
kernel/irq/irqdomain.c
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@ -801,15 +801,26 @@ static int virq_debug_show(struct seq_file *m, void *private)
mutex_lock(&irq_domain_mutex);
list_for_each_entry(domain, &irq_domain_list, link) {
struct device_node *of_node;
const char *name;
int count = 0;
of_node = irq_domain_get_of_node(domain);
if (of_node)
name = of_node_full_name(of_node);
else if (is_fwnode_irqchip(domain->fwnode))
name = container_of(domain->fwnode, struct irqchip_fwid,
fwnode)->name;
else
name = "";
radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0)
count++;
seq_printf(m, "%c%-16s %6u %10u %10u %s\n",
domain == irq_default_domain ? '*' : ' ', domain->name,
domain->revmap_size + count, domain->revmap_size,
domain->revmap_direct_max_irq,
of_node ? of_node_full_name(of_node) : "");
name);
}
mutex_unlock(&irq_domain_mutex);