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gpio: gpio-wcove: fix GPIO IRQ status mask 

According to Whiskey Cove PMIC spec, bit 7 of GPIOIRQ0_REG belongs to
battery IO. So we should skip this bit when checking for GPIO IRQ pending
status. Otherwise, wcove_gpio_irq_handler() might go into the infinite
loop until IRQ "pending" status becomes 0. This patch fixes this issue.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Kuppuswamy Sathyanarayanan 2017-04-24 12:15:04 -07:00 committed by Linus Walleij
parent fa2f60ffa0
commit 881ebd229f
1 changed files with 4 additions and 2 deletions
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6
drivers/gpio/gpio-wcove.c
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@ -51,6 +51,8 @@
#define GROUP1_NR_IRQS 6
#define IRQ_MASK_BASE 0x4e19
#define IRQ_STATUS_BASE 0x4e0b
#define GPIO_IRQ0_MASK GENMASK(6, 0)
#define GPIO_IRQ1_MASK GENMASK(5, 0)
#define UPDATE_IRQ_TYPE BIT(0)
#define UPDATE_IRQ_MASK BIT(1)
@ -309,7 +311,7 @@ static irqreturn_t wcove_gpio_irq_handler(int irq, void *data)
return IRQ_NONE;
}
pending = p[0] | (p[1] << 8);
pending = (p[0] & GPIO_IRQ0_MASK) | ((p[1] & GPIO_IRQ1_MASK) << 7);
if (!pending)
return IRQ_NONE;
@ -333,7 +335,7 @@ static irqreturn_t wcove_gpio_irq_handler(int irq, void *data)
break;
}
pending = p[0] | (p[1] << 8);
pending = (p[0] & GPIO_IRQ0_MASK) | ((p[1] & GPIO_IRQ1_MASK) << 7);
}
return IRQ_HANDLED;