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sunxi: gpio: Add .xlate function for gpio phandle resolution

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sunxi uses a 2 cell phandle for gpio bindings. Also there are no
seperate nodes for each pin bank.

Add a custom .xlate function to map gpio phandles to the correct
pin bank device. This fixes gpio_request_by_name usage.

Fixes: 7aa9748584 ("dm: sunxi: Modify the GPIO driver to support driver
		      model")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Chen-Yu Tsai 2016-07-22 16:12:59 +08:00 committed by Hans de Goede
parent 5c928d0204
commit 4694dc56e9
1 changed files with 16 additions and 0 deletions
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16
drivers/gpio/sunxi_gpio.c
View File

@ -19,6 +19,7 @@
#include <asm/io.h>
#include <asm/gpio.h>
#include <dm/device-internal.h>
#include <dt-bindings/gpio/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@ -215,12 +216,27 @@ static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
return GPIOF_FUNC;
}
static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
{
int ret;
ret = device_get_child(dev, args->args[0], &desc->dev);
if (ret)
return ret;
desc->offset = args->args[1];
desc->flags = args->args[2] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
return 0;
}
static const struct dm_gpio_ops gpio_sunxi_ops = {
.direction_input = sunxi_gpio_direction_input,
.direction_output = sunxi_gpio_direction_output,
.get_value = sunxi_gpio_get_value,
.set_value = sunxi_gpio_set_value,
.get_function = sunxi_gpio_get_function,
.xlate = sunxi_gpio_xlate,
};
/**