diff options
Diffstat (limited to 'arch/avr32/mach-at32ap/pio.c')
| -rw-r--r-- | arch/avr32/mach-at32ap/pio.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c index ed81a8bcb22d..09a274c9d0b7 100644 --- a/arch/avr32/mach-at32ap/pio.c +++ b/arch/avr32/mach-at32ap/pio.c @@ -167,22 +167,29 @@ void at32_deselect_pin(unsigned int pin) } /* Reserve a pin, preventing anyone else from changing its configuration. */ -void __init at32_reserve_pin(unsigned int pin) +void __init at32_reserve_pin(unsigned int port, u32 pin_mask) { struct pio_device *pio; - unsigned int pin_index = pin & 0x1f; - pio = gpio_to_pio(pin); + /* assign and verify pio */ + pio = gpio_to_pio(port); if (unlikely(!pio)) { - printk("pio: invalid pin %u\n", pin); + printk(KERN_WARNING "pio: invalid port %u\n", port); goto fail; } - if (unlikely(test_and_set_bit(pin_index, &pio->pinmux_mask))) { - printk("%s: pin %u is busy\n", pio->name, pin_index); + /* Test if any of the requested pins is already muxed */ + spin_lock(&pio_lock); + if (unlikely(pio->pinmux_mask & pin_mask)) { + printk(KERN_WARNING "%s: pin(s) busy (req. 0x%x, busy 0x%x)\n", + pio->name, pin_mask, pio->pinmux_mask & pin_mask); + spin_unlock(&pio_lock); goto fail; } + /* Reserve pins */ + pio->pinmux_mask |= pin_mask; + spin_unlock(&pio_lock); return; fail: |