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ARM: OMAP2/3: GPIO: do not attempt to wake-enable 

The GPIO IRQ enable/disable path attempts to also enable IRQ wake
support for the parent GPIO bank IRQ as well.  However, since there is
no 'set_wake' hook for the bank IRQs, these calls will always fail.
Also, since the enable will fail on the suspend path, the disable on
the resume path will trigger unbalanced enable/disable warnings.

This was discovered in the suspend/resume path on OMAP3/Beagle using
the gpio-keys driver which disables/re-enables GPIO IRQ wakeups in the
suspend/resume path.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Kevin Hilman 2009-04-23 11:10:49 -07:00 committed by Tony Lindgren
parent d94a2eddf5
commit b3bb4f688c
1 changed files with 4 additions and 10 deletions
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14
arch/arm/plat-omap/gpio.c
View File

@ -921,13 +921,10 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
case METHOD_MPUIO: case METHOD_MPUIO:
case METHOD_GPIO_1610: case METHOD_GPIO_1610:
spin_lock_irqsave(&bank->lock, flags); spin_lock_irqsave(&bank->lock, flags);
if (enable) { if (enable)
bank->suspend_wakeup |= (1 << gpio); bank->suspend_wakeup |= (1 << gpio);
enable_irq_wake(bank->irq); else
} else {
disable_irq_wake(bank->irq);
bank->suspend_wakeup &= ~(1 << gpio); bank->suspend_wakeup &= ~(1 << gpio);
}
spin_unlock_irqrestore(&bank->lock, flags); spin_unlock_irqrestore(&bank->lock, flags);
return 0; return 0;
#endif #endif
@ -940,13 +937,10 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
return -EINVAL; return -EINVAL;
} }
spin_lock_irqsave(&bank->lock, flags); spin_lock_irqsave(&bank->lock, flags);
if (enable) { if (enable)
bank->suspend_wakeup |= (1 << gpio); bank->suspend_wakeup |= (1 << gpio);
enable_irq_wake(bank->irq); else
} else {
disable_irq_wake(bank->irq);
bank->suspend_wakeup &= ~(1 << gpio); bank->suspend_wakeup &= ~(1 << gpio);
}
spin_unlock_irqrestore(&bank->lock, flags); spin_unlock_irqrestore(&bank->lock, flags);
return 0; return 0;
#endif #endif