This deals with the polarity bit and selecting the correct bank device given a GPIO number.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/gpio/tegra_gpio.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
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 @@ static int tegra_gpio_get_function(struct udevice *dev, unsigned offset) 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 @@ static const struct dm_gpio_ops gpio_tegra_ops = { .get_value = tegra_gpio_get_value, .set_value = tegra_gpio_set_value, .get_function = tegra_gpio_get_function, + .xlate = tegra_gpio_xlate, };
/**