linux-toradex.git/arch/xtensa/kernel/irq.c, branch v3.9.2

xtensa: add device trees support

2012-12-19T05:10:23+00:00

Device trees allow specification of hardware topology and device
parameters at runtime instead of hard-coding them in platform setup
code. This allows running single binary kernel on a range of compatible
boards.

New boot parameters tag BP_TAG_FDT is allocated and a pointer to flat
device tree is passed in it.

Note that current interrupt mapping scheme uses single cell for
interrupt identification. That means that IRQ numbers used in DTS must
be CPU internal IRQ numbers, not external. It is possible to extend
interrupt identification to two cells, and use second cell to tell
external IRQ numbers form internal. That would allow to use single DTS
on multiple boards with different mapping of external IRQ numbers.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: add IRQ domains support

2012-12-19T05:10:23+00:00

IRQ domains provide a mechanism for conversion of linux IRQ numbers to
hardware IRQ numbers and vice versus. It is used by OpenFirmware for
linking device tree objects to their respective interrupt controllers.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: reorganize SR referencing

2012-10-16T04:48:08+00:00

- reference SRs by names where possible, not by numbers;
- get rid of __stringify around SR names where possible;
- remove unneeded SR names from asm/regs.h;
- add SREG_ prefix to remaining SR names;

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: fix xtensa_irq_unmask calls

2012-10-03T22:11:19+00:00

xtensa_irq_disable/xtensa_irq_enable used to call xtensa_irq_unmask with
wrong argument.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: Fixup irq conversion fallout and nmi_count

2011-04-19T22:32:09+00:00

Some unnamed moron fatfingered the arguments of the irq chip callbacks
to irq_chip instead of irq_data.

While at it remove the nmi_count() print in arch_show_interrupts()
which has been broken before the irq conversion already.

Signed-off-by: Thomas Gleixner

xtensa: Use generic show_interrupts()

2011-03-24T19:35:59+00:00

Signed-off-by: Thomas Gleixner

xtensa: Convert genirq namespace

2011-03-24T19:35:58+00:00

Scripted with coccinelle.

Signed-off-by: Thomas Gleixner

xtensa: Convert main irq_chip to new functions

2011-03-24T19:35:58+00:00

Signed-off-by: Thomas Gleixner 
Cc: Chris Zankel 
LKML-Reference: <20110206211137.653005586@linutronix.de>

genirq: Cleanup irq_chip->typename leftovers

2010-09-23T17:12:26+00:00

3 years transition phase is enough. Cleanup the last users and remove
the cruft.

Signed-off-by: Thomas Gleixner 
Cc: Leo Chen 
Cc: Hirokazu Takata 
Cc: Chris Metcalf 
Cc: Jeff Dike 
Cc: Chris Zankel

xtensa: convert to asm-generic/hardirq.h

2010-05-25T15:06:56+00:00

Also remove lots of unused irq_cpustat fields.

Signed-off-by: Christoph Hellwig 
Cc: Chris Zankel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds