In addition to consolidating the or1k-pic with other interrupt
controllers, this makes OpenRISC less tied to its on-cpu
interrupt controller.

All or1k-pic specific parts are moved out of irq.c and into
drivers/irqchip/irq-or1k-pic.c

In that transition, the functionality have been divided into
three chip variants.
One that handles level triggered interrupts, one that handles edge
triggered interrupts and one that handles the interrupt
controller that is present in the or1200 OpenRISC cpu
implementation.
Signed-off-by: NStefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Link: https://lkml.kernel.org/r/1401136302-27654-1-git-send-email-stefan.kristiansson@saunalahti.fiAcked-by: NJonas Bonn <jonas@southpole.se>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

or1k_pic_mask_ack was failing to actually mask the IRQ.
Signed-off-by: NGong Tao <gongtao0607@gmail.com>
Signed-off-by: NJonas Bonn <jonas@southpole.se>

Signed-off-by: NJonas Bonn <jonas@southpole.se>

Now that IRQ domains are in use, we should be acting on domain-local
IRQ numbers (hwirq) instead of 'global' ones.
Signed-off-by: NJonas Bonn <jonas@southpole.se>

Signed-off-by: NJonas Bonn <jonas@southpole.se>

This moves OpenRISC to using the irqdomain infrastructure.  This doesn't
fundamentally change anything other than that it will be easier to have
multiple interrupt controllers in the future.
Signed-off-by: NJonas Bonn <jonas@southpole.se>

Use of EXPORT_SYMBOL requires inclusion of export.h
Signed-off-by: NJonas Bonn <jonas@southpole.se>

This patch adds support for the OpenRISC PIC.
Signed-off-by: NJonas Bonn <jonas@southpole.se>
Cc: tglx@linutronix.de
Reviewed-by: NArnd Bergmann <arnd@arndb.de>