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authorSimon Glass <sjg@chromium.org>2015-01-05 20:05:34 -0700
committerSimon Glass <sjg@chromium.org>2015-01-29 17:09:51 -0700
commit1d08b4b7439f6538d37eb603cee83842bad23bc5 (patch)
treeb9d3b2baf709aef2c0a8713974221f0ffca9c50b
parent838aa5c94adc0da95c858ef70271078fd18dc4c9 (diff)
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dm: exynos: Add a GPIO translation function
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>
-rw-r--r--drivers/gpio/s5p_gpio.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/gpio/s5p_gpio.c b/drivers/gpio/s5p_gpio.c
index 6c41a42..0a245ba 100644
--- a/drivers/gpio/s5p_gpio.c
+++ b/drivers/gpio/s5p_gpio.c
@@ -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;