[PATCH] gpio: generic: add request function pointer

[Anthony Fee <anthony.fee@xxxxxxxxxx>]

gpiolib will require all gpio drivers to expicitly set the request function 
pointer in future. To encourage gpio driver developers to adhere to this 
standard gpio-generic.c now sets this function pointer.

Signed-off-by: Anthony Fee <anthony.fee@xxxxxxxxxx>
---
 drivers/gpio/gpio-generic.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index b5dff9e..fea8c82 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -388,6 +388,14 @@ static int bgpio_setup_direction(struct bgpio_chip 
*bgc,
        return 0;
 }

+static int bgpio_request(struct gpio_chip *chip, unsigned gpio_pin)
+{
+       if (gpio_pin < chip->ngpio)
+               return 0;
+
+       return -EINVAL;
+}
+
 int bgpio_remove(struct bgpio_chip *bgc)
 {
        return gpiochip_remove(&bgc->gc);
@@ -413,6 +421,7 @@ int bgpio_init(struct bgpio_chip *bgc, struct device 
*dev,
        bgc->gc.label = dev_name(dev);
        bgc->gc.base = -1;
        bgc->gc.ngpio = bgc->bits;
+       bgc->gc.request = bgpio_request;

        ret = bgpio_setup_io(bgc, dat, set, clr);
        if (ret)
-- 
1.9.0

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