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pinctrl: npcm8xx: clear all gpio events

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Clear all gpio events to avoid unexpected interrupts
during kernel booting.

Signed-off-by: Stanley Chu <yschu@nuvoton.com>
This commit is contained in:
Stanley Chu 2024-09-04 10:41:06 +08:00 • committed by Tom Rini
parent 28fe59e7d3
commit 3aa2eac4f0
1 changed files with 18 additions and 0 deletions
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18
drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
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@ -48,6 +48,7 @@
#define GPIO_OES 0x70 /* Output Enable Set */ #define GPIO_OES 0x70 /* Output Enable Set */
#define GPIO_OEC 0x74 /* Output Enable Clear */ #define GPIO_OEC 0x74 /* Output Enable Clear */
#define NPCM8XX_NUM_GPIO_BANK 8
#define NPCM8XX_GPIO_PER_BANK 32 #define NPCM8XX_GPIO_PER_BANK 32
#define GPIOX_OFFSET 16 #define GPIOX_OFFSET 16
@ -967,6 +968,18 @@ static int npcm8xx_pinconf_set(struct udevice *dev, unsigned int selector,
} }
#endif #endif
static void npcm8xx_pinctrl_clear_events(struct npcm8xx_pinctrl_priv *priv)
{
void __iomem *base;
int i;
for (i = 0; i < NPCM8XX_NUM_GPIO_BANK; i++) {
base = priv->gpio_base + (0x1000 * i);
clrbits_le32(base + GPIO_EVEN, 0xFFFFFFFF);
setbits_le32(base + GPIO_EVST, 0xFFFFFFFF);
}
}
static struct pinctrl_ops npcm8xx_pinctrl_ops = { static struct pinctrl_ops npcm8xx_pinctrl_ops = {
.set_state = pinctrl_generic_set_state, .set_state = pinctrl_generic_set_state,
.get_pins_count = npcm8xx_get_pins_count, .get_pins_count = npcm8xx_get_pins_count,
@ -1001,6 +1014,11 @@ static int npcm8xx_pinctrl_probe(struct udevice *dev)
if (IS_ERR(priv->rst_regmap)) if (IS_ERR(priv->rst_regmap))
return -EINVAL; return -EINVAL;
/*
* Clear all previous gpio events, otherwise it may produce
* unexpected interrupts during kernel booting.
*/
npcm8xx_pinctrl_clear_events(priv);
return 0; return 0;
} }