dm: tegra: Add a GPIO translation function
This deals with the polarity bit and selecting the correct bank device
given a GPIO number.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/gpio/tegra_gpio.c b/drivers/gpio/tegra_gpio.c
index 88f7ef5..43928b8 100644
--- a/drivers/gpio/tegra_gpio.c
+++ b/drivers/gpio/tegra_gpio.c
@@ -21,6 +21,7 @@
#include <asm/arch/tegra.h>
#include <asm/gpio.h>
#include <dm/device-internal.h>
+#include <dt-bindings/gpio/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -251,6 +252,22 @@
return GPIOF_INPUT;
}
+static int tegra_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
+ struct fdtdec_phandle_args *args)
+{
+ int gpio, port, ret;
+
+ gpio = args->args[0];
+ port = gpio / TEGRA_GPIOS_PER_PORT;
+ ret = device_get_child(dev, port, &desc->dev);
+ if (ret)
+ return ret;
+ desc->offset = gpio % TEGRA_GPIOS_PER_PORT;
+ desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
+
+ return 0;
+}
+
static const struct dm_gpio_ops gpio_tegra_ops = {
.request = tegra_gpio_request,
.direction_input = tegra_gpio_direction_input,
@@ -258,6 +275,7 @@
.get_value = tegra_gpio_get_value,
.set_value = tegra_gpio_set_value,
.get_function = tegra_gpio_get_function,
+ .xlate = tegra_gpio_xlate,
};
/**