gpiolib: avr32 at32ap platform support

Teach AVR32 to use the "GPIO Library" when exposing its GPIOs, so that signals
on external chips (like GPIO expanders) can easily be used.

This mostly reorganizes some existing logic, with two minor changes in
behavior:

 - The PSR registers are used instead of the previous "gpio_mask" values,
   matching AT91 behavior and removing some duplication between that role
   and that of "pinmux_mask".

 - NR_IRQs grew to acommodate a bank of external GPIOs.  Eventually this
   number should probably become a board-specific config option.

There's a debugfs dump of status for the built-in GPIOs, showing which pins
have deglitching, pullups, or open drain drive enabled, as well as the ID
string used when requesting each IRQ.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/asm-avr32/arch-at32ap/irq.h b/include/asm-avr32/arch-at32ap/irq.h
index 5adffab9a577..608e350368c7 100644
--- a/include/asm-avr32/arch-at32ap/irq.h
+++ b/include/asm-avr32/arch-at32ap/irq.h
@@ -3,11 +3,11 @@
 
 #define EIM_IRQ_BASE    NR_INTERNAL_IRQS
 #define NR_EIM_IRQS     32
-
 #define AT32_EXTINT(n)  (EIM_IRQ_BASE + (n))
 
 #define GPIO_IRQ_BASE   (EIM_IRQ_BASE + NR_EIM_IRQS)
-#define NR_GPIO_IRQS    (5 * 32)
+#define NR_GPIO_CTLR    (5 /*internal*/ + 1 /*external*/)
+#define NR_GPIO_IRQS    (NR_GPIO_CTLR * 32)
 
 #define NR_IRQS         (GPIO_IRQ_BASE + NR_GPIO_IRQS)