diff options
| author | Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> | 2017-04-24 22:15:04 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-04-28 10:33:04 +0300 |
| commit | 881ebd229f4a5ea88f269c1225245e50db9ba303 (patch) | |
| tree | 13932d6ea8188f61bf3993f3573737503d747ea5 | |
| parent | fa2f60ffa0e0a33406ef9538635a57ac499965ae (diff) | |
| download | linux-881ebd229f4a5ea88f269c1225245e50db9ba303.tar.xz | |
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>
| -rw-r--r-- | drivers/gpio/gpio-wcove.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c index bf7b71d7cf5b..7b1bc20be209 100644 --- a/drivers/gpio/gpio-wcove.c +++ b/drivers/gpio/gpio-wcove.c @@ -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; |