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gpiolib: Export gpiochip_irqchip_irq_valid() to drivers 

Some pinctrl drivers can use the gpiochip irq valid information
to figure out if certain gpios are exposed to the kernel for
usage or not. Expose this API so we can use it in the
pinmux_ops::request ops.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stephen Boyd 2018-01-09 17:58:46 -08:00 committed by Linus Walleij
parent 9961dbcd22
commit 64ff2c8e46
2 changed files with 6 additions and 2 deletions
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5
drivers/gpio/gpiolib.c
View File

@ -1501,14 +1501,15 @@ static void gpiochip_irqchip_free_valid_mask(struct gpio_chip *gpiochip)
gpiochip->irq.valid_mask = NULL;
}
static bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
unsigned int offset)
bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
unsigned int offset)
{
/* No mask means all valid */
if (likely(!gpiochip->irq.valid_mask))
return true;
return test_bit(offset, gpiochip->irq.valid_mask);
}
EXPORT_SYMBOL_GPL(gpiochip_irqchip_irq_valid);
/**
* gpiochip_set_cascaded_irqchip() - connects a cascaded irqchip to a gpiochip

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

@ -431,6 +431,9 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gpiochip,
bool threaded,
struct lock_class_key *lock_key);
bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
unsigned int offset);
#ifdef CONFIG_LOCKDEP
/*