irqdomain: augment add_simple() to allocate descs

Currently we rely on all IRQ chip instances to dynamically
allocate their IRQ descriptors unless they use the linear
IRQ domain. So for irqdomain_add_legacy() and
irqdomain_add_simple() the caller need to make sure that
descriptors are allocated.

Let's slightly augment the yet unused irqdomain_add_simple()
to also allocate descriptors as a means to simplify usage
and avoid code duplication throughout the kernel.

We warn if descriptors cannot be allocated, e.g. if a
platform has the bad habit of hogging descriptors at boot
time.

Cc: Thomas Gleixner <[email protected]>
Cc: Grant Likely <[email protected]>
Cc: Paul Mundt <[email protected]>
Cc: Russell King <[email protected]>
Cc: Lee Jones <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

0 files changed, 0 insertions, 0 deletions