diff options
| author |   Stephen Boyd <swboyd@chromium.org> | 2018-03-23 09:34:50 -0700 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2018-03-27 15:34:07 +0200 |
| commit | e4371f6e079294369ecb4cfa03aaeb60831e8b91 (patch) | |
| tree | 8ee1a67f3f0f91859b1b9a5335ec5464fc71e59e /drivers/gpio | |
| parent | dt-bindings: gpio: Add a gpio-reserved-ranges property (diff) | |
| download | linux-dev-e4371f6e079294369ecb4cfa03aaeb60831e8b91.tar.xz linux-dev-e4371f6e079294369ecb4cfa03aaeb60831e8b91.zip | |
gpiolib: Extract mask allocation into subroutine
We're going to use similar code to allocate and set all the bits in a
mask for valid gpios to use. Extract the code from the irqchip version
so it can be reused.
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index d66de67ef307..cc0e1519da45 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -337,6 +337,20 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc) return 0; } +static unsigned long *gpiochip_allocate_mask(struct gpio_chip *chip) +{ + unsigned long *p; + + p = kcalloc(BITS_TO_LONGS(chip->ngpio), sizeof(long), GFP_KERNEL); + if (!p) + return NULL; + + /* Assume by default all GPIOs are valid */ + bitmap_fill(p, chip->ngpio); + + return p; +} + /* * GPIO line handle management */ @@ -1506,14 +1520,10 @@ static int gpiochip_irqchip_init_valid_mask(struct gpio_chip *gpiochip) if (!gpiochip->irq.need_valid_mask) return 0; - gpiochip->irq.valid_mask = kcalloc(BITS_TO_LONGS(gpiochip->ngpio), - sizeof(long), GFP_KERNEL); + gpiochip->irq.valid_mask = gpiochip_allocate_mask(gpiochip); if (!gpiochip->irq.valid_mask) return -ENOMEM; - /* Assume by default all GPIOs are valid */ - bitmap_fill(gpiochip->irq.valid_mask, gpiochip->ngpio); - return 0; } |