[PATCH v3 2/2] pinctrl: renesas: rzg2l: Configure the interrupt type on resume

From: Claudiu
Date: Wed Mar 20 2024 - 06:43:57 EST


From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>

Commit dce0919c83c3 ("irqchip/renesas-rzg2l: Do not set TIEN and TINT
source at the same time") removed the setup of TINT from
rzg2l_irqc_irq_enable(). To address the spourious interrupt issue the setup
of TINT has been moved in rzg2l_tint_set_edge() though
rzg2l_disable_tint_and_set_tint_source(). With this, the interrupts are
not properly re-configured after a suspend-to-RAM cycle. To address
this issue and avoid spurious interrupts while resumming set the
interrupt type before enabling it.

Fixes: dce0919c83c3 ("irqchip/renesas-rzg2l: Do not set TIEN and TINT source at the same time")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
---
drivers/pinctrl/renesas/pinctrl-rzg2l.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 93916553bcc7..4fee3b0e6c5e 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -2045,7 +2045,9 @@ static void rzg2l_gpio_irq_restore(struct rzg2l_pinctrl *pctrl)

for (unsigned int i = 0; i < RZG2L_TINT_MAX_INTERRUPT; i++) {
struct irq_data *data;
+ unsigned long flags;
unsigned int virq;
+ int ret;

if (!pctrl->hwirq[i])
continue;
@@ -2063,17 +2065,17 @@ static void rzg2l_gpio_irq_restore(struct rzg2l_pinctrl *pctrl)
continue;
}

- if (!irqd_irq_disabled(data)) {
- unsigned long flags;
-
- /*
- * This has to be atomically executed to protect against a concurrent
- * interrupt.
- */
- raw_spin_lock_irqsave(&pctrl->lock.rlock, flags);
+ /*
+ * This has to be atomically executed to protect against a concurrent
+ * interrupt.
+ */
+ raw_spin_lock_irqsave(&pctrl->lock.rlock, flags);
+ ret = rzg2l_gpio_irq_set_type(data, irqd_get_trigger_type(data));
+ if (ret)
+ dev_crit(pctrl->dev, "Failed to set IRQ type for virq=%u\n", virq);
+ else if (!irqd_irq_disabled(data))
rzg2l_gpio_irq_enable(data);
- raw_spin_unlock_irqrestore(&pctrl->lock.rlock, flags);
- }
+ raw_spin_unlock_irqrestore(&pctrl->lock.rlock, flags);
}
}

--
2.39.2