[PATCH v8 16/35] pinctrl: airoha: fix IRQ mask/unmask code

[Mikhail Kshevetskiy]

When using IRQCHIP_IMMUTABLE, airoha_irq_unmask() must manually call
gpiochip_enable_irq() and airoha_irq_mask() must call
gpiochip_disable_irq(). Without these calls, gpiolib never sets the
GPIOD_FLAG_IRQ_IS_ENABLED bit. Because this bit is missing,
gpiod_direction_output() will not realize the pin is actively used
as an interrupt.

Fixes: 1c8ace2d0725 ("pinctrl: airoha: Add support for EN7581 SoC")
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@xxxxxxxxx>
Acked-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
 drivers/pinctrl/airoha/pinctrl-airoha.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/airoha/pinctrl-airoha.c b/drivers/pinctrl/airoha/pinctrl-airoha.c
index a27a3188ca006..d58829da6465c 100644
--- a/drivers/pinctrl/airoha/pinctrl-airoha.c
+++ b/drivers/pinctrl/airoha/pinctrl-airoha.c
@@ -2575,6 +2575,7 @@ static void airoha_irq_unmask(struct irq_data *data)
 	if (WARN_ON_ONCE(data->hwirq >= ARRAY_SIZE(gpiochip->irq_type)))
 		return;
 
+	gpiochip_enable_irq(gc, irqd_to_hwirq(data));
 	switch (gpiochip->irq_type[data->hwirq]) {
 	case IRQ_TYPE_LEVEL_LOW:
 		val = val << 1;
@@ -2609,6 +2610,7 @@ static void airoha_irq_mask(struct irq_data *data)
 
 	regmap_clear_bits(pinctrl->regmap, gpiochip->level[index], mask);
 	regmap_clear_bits(pinctrl->regmap, gpiochip->edge[index], mask);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(data));
 }
 
 static int airoha_irq_type(struct irq_data *data, unsigned int type)
-- 
2.53.0