Add userland access to at91 gpio functionality via ioctl calls. Also,

add the ability for userland to be notified of changes on gpio pins via
a select(2)/read(2) interface.

Change the interrupt handler from filtered to threaded.

Because of the uiomove() calls in the new interface, change locking from
standard mutex to sx.

Add / restore the at91_gpio_high_z() function.

Reviewed by:	imp (long ago)

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/arm/at91/at91_piovar.h b/sys/arm/at91/at91_piovar.h
index e73bea9..0608f16 100644
--- a/sys/arm/at91/at91_piovar.h
+++ b/sys/arm/at91/at91_piovar.h
@@ -36,6 +36,7 @@ void at91_pio_use_gpio(uint32_t pio, uint32_t gpio_mask);
 void at91_pio_gpio_input(uint32_t pio, uint32_t input_enable_mask);
 void at91_pio_gpio_output(uint32_t pio, uint32_t output_enable_mask,
     int use_pullup);
+void at91_pio_gpio_high_z(uint32_t pio, uint32_t high_z_mask, int enable);
 void at91_pio_gpio_set(uint32_t pio, uint32_t data_mask);
 void at91_pio_gpio_clear(uint32_t pio, uint32_t data_mask);
 uint8_t at91_pio_gpio_get(uint32_t pio, uint32_t data_mask);