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| author | Octavian Purdila <octavian.purdila@intel.com> | 2014-09-19 23:22:44 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-09-24 10:53:42 +0200 |
| commit | 295494af0695bc190e6b939df1036af898c2856f (patch) | |
| tree | e25aaff1a68a794d720f597a48ee9206ce5994a2 | |
| parent | 4f51b91335a63b2672a0f21fd13a684c8e35c4e8 (diff) | |
| download | linux-295494af0695bc190e6b939df1036af898c2856f.tar.gz linux-295494af0695bc190e6b939df1036af898c2856f.tar.xz | |
gpiolib: add irq_not_threaded flag to gpio_chip
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>
| -rw-r--r-- | drivers/gpio/gpiolib.c | 2 | ||||
| -rw-r--r-- | include/linux/gpio/driver.h | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 4acf8b2e9226..6fdae789ccc9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -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); diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 560bf7fa614f..719fab209158 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -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 |