diff options
Diffstat (limited to 'arch/avr32/mach-at32ap/pio.c')
| -rw-r--r-- | arch/avr32/mach-at32ap/pio.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c index 405ee6bad4ce..90ef538ae547 100644 --- a/arch/avr32/mach-at32ap/pio.c +++ b/arch/avr32/mach-at32ap/pio.c @@ -134,6 +134,25 @@ fail: dump_stack(); } +/* + * Undo a previous pin reservation. Will not affect the hardware + * configuration. + */ +void at32_deselect_pin(unsigned int pin) +{ + struct pio_device *pio; + unsigned int pin_index = pin & 0x1f; + + pio = gpio_to_pio(pin); + if (unlikely(!pio)) { + printk("pio: invalid pin %u\n", pin); + dump_stack(); + return; + } + + clear_bit(pin_index, &pio->pinmux_mask); +} + /* Reserve a pin, preventing anyone else from changing its configuration. */ void __init at32_reserve_pin(unsigned int pin) { |