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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>
This commit is contained in:
Stephen Boyd 2018-03-23 09:34:50 -07:00 committed by Linus Walleij
parent b9c725ed73
commit e4371f6e07
1 changed files with 15 additions and 5 deletions
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20
drivers/gpio/gpiolib.c
View File

@ -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;
}