[AVR32] GPIO API implementation

Arch-neutral GPIO calls for AVR32. GPIO IRQ support written by
David Brownell.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

3 files changed, 45 insertions, 3 deletions

diff --git a/include/asm-avr32/arch-at32ap/gpio.h b/include/asm-avr32/arch-at32ap/gpio.h
new file mode 100644
index 000000000000..fcb756bdaa8e
--- /dev/null
+++ b/include/asm-avr32/arch-at32ap/gpio.h
@@ -0,0 +1,27 @@
+#ifndef __ASM_AVR32_ARCH_GPIO_H
+#define __ASM_AVR32_ARCH_GPIO_H
+
+#include <linux/compiler.h>
+#include <asm/irq.h>
+
+
+/* Arch-neutral GPIO API */
+int __must_check gpio_request(unsigned int gpio, const char *label);
+void gpio_free(unsigned int gpio);
+
+int gpio_direction_input(unsigned int gpio);
+int gpio_direction_output(unsigned int gpio);
+int gpio_get_value(unsigned int gpio);
+void gpio_set_value(unsigned int gpio, int value);
+
+static inline int gpio_to_irq(unsigned int gpio)
+{
+        return gpio + GPIO_IRQ_BASE;
+}
+
+static inline int irq_to_gpio(unsigned int irq)
+{
+        return irq - GPIO_IRQ_BASE;
+}
+
+#endif /* __ASM_AVR32_ARCH_GPIO_H */
diff --git a/include/asm-avr32/arch-at32ap/irq.h b/include/asm-avr32/arch-at32ap/irq.h
new file mode 100644
index 000000000000..f8f7f4571e44
--- /dev/null
+++ b/include/asm-avr32/arch-at32ap/irq.h
@@ -0,0 +1,14 @@
+#ifndef __ASM_AVR32_ARCH_IRQ_H
+#define __ASM_AVR32_ARCH_IRQ_H
+
+#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    (4 * 32)
+
+#define NR_IRQS         (GPIO_IRQ_BASE + NR_GPIO_IRQS)
+
+#endif /* __ASM_AVR32_ARCH_IRQ_H */
diff --git a/include/asm-avr32/arch-at32ap/portmux.h b/include/asm-avr32/arch-at32ap/portmux.h
index 83c690571322..2ba611e0e134 100644
--- a/include/asm-avr32/arch-at32ap/portmux.h
+++ b/include/asm-avr32/arch-at32ap/portmux.h
@@ -15,9 +15,10 @@
  *
  * The following flags determine the initial state of the pin.
  */
-#define AT32_GPIOF_PULLUP       0x00000001      /* Enable pull-up */
-#define AT32_GPIOF_OUTPUT       0x00000002      /* Enable output driver */
-#define AT32_GPIOF_HIGH         0x00000004      /* Set output high */
+#define AT32_GPIOF_PULLUP       0x00000001      /* (not-OUT) Enable pull-up */
+#define AT32_GPIOF_OUTPUT       0x00000002      /* (OUT) Enable output driver */
+#define AT32_GPIOF_HIGH         0x00000004      /* (OUT) Set output high */
+#define AT32_GPIOF_DEGLITCH     0x00000008      /* (IN) Filter glitches */
 
 void at32_select_periph(unsigned int pin, unsigned int periph,
                         unsigned long flags);