To i.MX controller, we use such as "<&gpio1 3 GPIO_ACTIVE_LOW>" for a device to refer a gpio pin in device tree. So need to implement xlate function, to correctly handle gpio flags and offset.
Signed-off-by: Peng Fan van.freenix@gmail.com Cc: Simon Glass sjg@chromium.org Cc: Stefano Babic sbabic@denx.de Cc: Fabio Estevam fabio.estevam@nxp.com --- drivers/gpio/mxc_gpio.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/gpio/mxc_gpio.c b/drivers/gpio/mxc_gpio.c index b6ae3fc..15449d7 100644 --- a/drivers/gpio/mxc_gpio.c +++ b/drivers/gpio/mxc_gpio.c @@ -10,10 +10,12 @@ #include <common.h> #include <errno.h> #include <dm.h> +#include <fdtdec.h> #include <malloc.h> #include <asm/arch/imx-regs.h> #include <asm/gpio.h> #include <asm/io.h> +#include <dt-bindings/gpio/gpio.h>
enum mxc_gpio_direction { MXC_GPIO_DIRECTION_IN, @@ -263,12 +265,22 @@ static int mxc_gpio_get_function(struct udevice *dev, unsigned offset) return GPIOF_INPUT; }
+static int mxc_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_mxc_ops = { .direction_input = mxc_gpio_direction_input, .direction_output = mxc_gpio_direction_output, .get_value = mxc_gpio_get_value, .set_value = mxc_gpio_set_value, .get_function = mxc_gpio_get_function, + .xlate = mxc_gpio_xlate, };
static int mxc_gpio_probe(struct udevice *dev)