Commit c65d1fd3 authored by Russell King's avatar Russell King Committed by Linus Walleij

gpio: sa1100: implement get_direction method

Allow gpiolib to read back the current IO direction configuration by
implementing the .get_direction callback.  This, in part, allows
debugfs to report the complete true hardware state rather than the
software state.
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 07242b24
......@@ -52,6 +52,13 @@ static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
writel_relaxed(BIT(offset), sa1100_gpio_chip(chip)->membase + reg);
}
static int sa1100_get_direction(struct gpio_chip *chip, unsigned offset)
{
void __iomem *gpdr = sa1100_gpio_chip(chip)->membase + R_GPDR;
return !(readl_relaxed(gpdr) & BIT(offset));
}
static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
{
void __iomem *gpdr = sa1100_gpio_chip(chip)->membase + R_GPDR;
......@@ -85,6 +92,7 @@ static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset)
static struct sa1100_gpio_chip sa1100_gpio_chip = {
.chip = {
.label = "gpio",
.get_direction = sa1100_get_direction,
.direction_input = sa1100_direction_input,
.direction_output = sa1100_direction_output,
.set = sa1100_gpio_set,
......
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