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dm: exynos: Add a GPIO translation function

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This deals with the polarity bit. It also changes the GPIO devices so that
the correct device tree node is linked to each one. This allows us to use
the new uclass phandle functionality to implement a proper GPIO binding.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-01-05 20:05:34 -07:00
parent 838aa5c94a
commit 1d08b4b743
1 changed files with 12 additions and 1 deletions
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13
drivers/gpio/s5p_gpio.c
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@ -13,6 +13,7 @@
#include <asm/io.h>
#include <asm/gpio.h>
#include <dm/device-internal.h>
#include <dt-bindings/gpio/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@ -275,12 +276,22 @@ static int exynos_gpio_get_function(struct udevice *dev, unsigned offset)
return GPIOF_FUNC;
}
static int exynos_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
{
desc->offset = args->args[0];
desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
return 0;
}
static const struct dm_gpio_ops gpio_exynos_ops = {
.direction_input = exynos_gpio_direction_input,
.direction_output = exynos_gpio_direction_output,
.get_value = exynos_gpio_get_value,
.set_value = exynos_gpio_set_value,
.get_function = exynos_gpio_get_function,
.xlate = exynos_gpio_xlate,
};
static int gpio_exynos_probe(struct udevice *dev)
@ -342,7 +353,7 @@ static int gpio_exynos_bind(struct udevice *parent)
plat->bank_name, plat, -1, &dev);
if (ret)
return ret;
dev->of_offset = parent->of_offset;
dev->of_offset = node;
}
return 0;