[ARM] 5566/1: Remove at91_gpiolib_request

Remove at91_gpiolib_request. It returns -EPERM if a request pin is not
in GPIO mode, however we want to be able to gpio_request alternative
function pins to reserve them, and in some cases we need to be able to
use the gpiolib functions on alternative function pins.

Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index f2236f0..ae4772e 100644 (file)
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -44,13 +44,11 @@ static int at91_gpiolib_direction_output(struct gpio_chip *chip,
                                         unsigned offset, int val);
 static int at91_gpiolib_direction_input(struct gpio_chip *chip,
                                        unsigned offset);
-static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset);
 
 #define AT91_GPIO_CHIP(name, base_gpio, nr_gpio)                       \
        {                                                               \
                .chip = {                                               \
                        .label            = name,                       \
-                       .request          = at91_gpiolib_request,       \
                        .direction_input  = at91_gpiolib_direction_input, \
                        .direction_output = at91_gpiolib_direction_output, \
                        .get              = at91_gpiolib_get,           \
@@ -588,19 +586,6 @@ static void at91_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val)
        __raw_writel(mask, pio + (val ? PIO_SODR : PIO_CODR));
 }
 
-static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset)
-{
-       unsigned pin = chip->base + offset;
-       void __iomem *pio = pin_to_controller(pin);
-       unsigned mask = pin_to_mask(pin);
-
-       /* Cannot request GPIOs that are in alternate function mode */
-       if (!(__raw_readl(pio + PIO_PSR) & mask))
-               return -EPERM;
-
-       return 0;
-}
-
 static void at91_gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
        int i;