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gpiolib: add irq_not_threaded flag to gpio_chip

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Some GPIO chips (e.g. the DLN2 USB adapter) have blocking get/set
operation but do not need a threaded irq handler.

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Octavian Purdila 2014-09-19 23:22:44 +03:00 committed by Linus Walleij
parent 4f51b91335
commit 295494af06
2 changed files with 4 additions and 1 deletions
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2
drivers/gpio/gpiolib.c
View File

@ -437,7 +437,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
irq_set_lockdep_class(irq, &gpiochip_irq_lock_class);
irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
/* Chips that can sleep need nested thread handlers */
if (chip->can_sleep)
if (chip->can_sleep && !chip->irq_not_threaded)
irq_set_nested_thread(irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(irq, IRQF_VALID);

3
include/linux/gpio/driver.h
View File

@ -56,6 +56,8 @@ struct seq_file;
* as the chip access may sleep when e.g. reading out the IRQ status
* registers.
* @exported: flags if the gpiochip is exported for use from sysfs. Private.
* @irq_not_threaded: flag must be set if @can_sleep is set but the
* IRQs don't need to be threaded
*
* A gpio_chip can help platforms abstract various sources of GPIOs so
* they can all be accessed through a common programing interface.
@ -101,6 +103,7 @@ struct gpio_chip {
struct gpio_desc *desc;
const char *const *names;
bool can_sleep;
bool irq_not_threaded;
bool exported;
#ifdef CONFIG_GPIOLIB_IRQCHIP