diff options
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index f48817d97480..c12fe9dfd2db 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1363,6 +1363,11 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, int parent_irq, irq_flow_handler_t parent_handler) { + if (gpiochip->can_sleep) { + chip_err(gpiochip, "you cannot have chained interrupts on a chip that may sleep\n"); + return; + } + irq_set_chained_handler(parent_irq, parent_handler); /* * The parent irqchip is already using the chip_data for this @@ -1389,6 +1394,9 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_set_chip_data(irq, chip); irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler); + /* Chips that can sleep need nested thread handlers */ + if (chip->can_sleep) + irq_set_nested_thread(irq, 1); #ifdef CONFIG_ARM set_irq_flags(irq, IRQF_VALID); #else @@ -1401,9 +1409,13 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, static void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq) { + struct gpio_chip *chip = d->host_data; + #ifdef CONFIG_ARM set_irq_flags(irq, 0); #endif + if (chip->can_sleep) + irq_set_nested_thread(irq, 0); irq_set_chip_and_handler(irq, NULL, NULL); irq_set_chip_data(irq, NULL); } |