diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-01-11 15:34:05 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-01-11 15:34:05 +0100 |
commit | d19b85db9d5c44a4c21dcb10d6fbadaa4425ab2a (patch) | |
tree | 250be7a5a29069f7d1f4524fa45ab0e988833025 /arch/avr32/mach-at32ap/pio.c | |
parent | 490dea45d00f01847ebebd007685d564aaf2cd98 (diff) | |
parent | c59765042f53a79a7a65585042ff463b69cb248c (diff) |
Merge commit 'v2.6.29-rc1' into timers/urgent
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 ed81a8bcb22..09a274c9d0b 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: |