diff options
Diffstat (limited to 'Documentation/IRQ-domain.txt')
| -rw-r--r-- | Documentation/IRQ-domain.txt | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/IRQ-domain.txt b/Documentation/IRQ-domain.txt index 9bc95942ec2..8a8b82c9ca5 100644 --- a/Documentation/IRQ-domain.txt +++ b/Documentation/IRQ-domain.txt @@ -41,8 +41,7 @@ An interrupt controller driver creates and registers an irq_domain by calling one of the irq_domain_add_*() functions (each mapping method has a different allocator function, more on that later). The function will return a pointer to the irq_domain on success. The caller must -provide the allocator function with an irq_domain_ops structure with -the .map callback populated as a minimum. +provide the allocator function with an irq_domain_ops structure. In most cases, the irq_domain will begin empty without any mappings between hwirq and IRQ numbers. Mappings are added to the irq_domain @@ -141,7 +140,7 @@ will use a legacy domain only if an IRQ range is supplied by the system and will otherwise use a linear domain mapping. The semantics of this call are such that if an IRQ range is specified then descriptors will be allocated on-the-fly for it, and if no range is -specified it will fall through to irq_domain_add_linear() which meand +specified it will fall through to irq_domain_add_linear() which means *no* irq descriptors will be allocated. A typical use case for simple domains is where an irqchip provider |