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pinctrl: npcm8xx: clear pending GPIO events during init

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A bank may retain pending event status across resets of the GPIO block.
If probe leaves the old state in place, the chained IRQ handler can see
spurious events as soon as the irqchip is registered.

Disable event generation and clear EVST before wiring each GPIO bank
into gpiolib so the driver starts from a known state.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
This commit is contained in:
Tomer Maimon 2026-07-15 15:29:19 +03:00 committed by Linus Walleij
parent dc0e211e1a
commit cd39cce4cf
1 changed files with 3 additions and 0 deletions
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3
drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
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@ -2471,6 +2471,9 @@ static int npcm8xx_gpio_fw(struct npcm8xx_pinctrl *pctrl)
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to retrieve IRQ for bank %u\n", id);
iowrite32(0, pctrl->gpio_bank[id].base + NPCM8XX_GP_N_EVEN);
iowrite32(0xffffffff, pctrl->gpio_bank[id].base + NPCM8XX_GP_N_EVST);
pctrl->gpio_bank[id].irq = ret;
pctrl->gpio_bank[id].irq_chip = npcmgpio_irqchip;
pctrl->gpio_bank[id].irqbase = id * NPCM8XX_GPIO_PER_BANK;