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gpio: mxc: Fix disabled interrupt wake-up support

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[ Upstream commit 3093e6cca3ba7d47848068cb256c489675125181 ]

A disabled/masked interrupt marked as wakeup source must be re-enable
and unmasked in order to be able to wake-up the host. That can be done
by flaging the irqchip with IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND.

Note: It 'sometimes' works without that change, but only thanks to the
lazy generic interrupt disabling (keeping interrupt unmasked).

Reported-by: Michal Koziel <michal.koziel@emlogic.no>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Loic Poulain
2021-06-17 15:54:13 +02:00
committed by Sasha Levin
parent f77f972384
commit d191c3d6ad
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-mxc.c
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@@ -361,7 +361,7 @@ static int mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
ct->chip.irq_unmask = irq_gc_mask_set_bit; ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_set_irq_type; ct->chip.irq_set_type = gpio_set_irq_type;
ct->chip.irq_set_wake = gpio_set_wake_irq; ct->chip.irq_set_wake = gpio_set_wake_irq;
ct->chip.flags = IRQCHIP_MASK_ON_SUSPEND; ct->chip.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND;
ct->regs.ack = GPIO_ISR; ct->regs.ack = GPIO_ISR;
ct->regs.mask = GPIO_IMR; ct->regs.mask = GPIO_IMR;