From: Etienne Carriere <[email protected]> ux500 machines performs pins (GPIO) reconfiguration when entering in the suspended mode. This reconfiguration aims at reaching an ultra low power HW configuration.
Due to this HW reconfiguration, some HW devices can change of HW state and have their output signals at level that could generate IRQs. If the non-wakeup IRQs are disabled but not yet masked (delayed interrupt disable feature from the generic irq layer), effective interrupts reach the system only because the system attempt to enter the suspended mode. To prevent such IRQs to trig, all irq chips embedded in ux500 platform should enable their IRQCHIP_MASK_ON_SUSPEND flag. Cc: Samuel Ortiz <[email protected]> Signed-off-by: Etienne Carriere <[email protected]> Signed-off-by: Linus Walleij <[email protected]> --- drivers/gpio/gpio-tc3589x.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c index 2a82e89..6e48c50 100644 --- a/drivers/gpio/gpio-tc3589x.c +++ b/drivers/gpio/gpio-tc3589x.c @@ -199,6 +199,7 @@ static struct irq_chip tc3589x_gpio_irq_chip = { .irq_mask = tc3589x_gpio_irq_mask, .irq_unmask = tc3589x_gpio_irq_unmask, .irq_set_type = tc3589x_gpio_irq_set_type, + .flags = IRQCHIP_MASK_ON_SUSPEND, }; static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
