diff options
| author | Simon Glass <sjg@chromium.org> | 2015-01-05 20:05:28 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-01-29 17:09:50 -0700 |
| commit | 0dac4d51f50e9252dbc00075cf65eeba57017926 (patch) | |
| tree | 2d31e477c73b0de6a3604092b02e4f5b8ef5a06b /drivers | |
| parent | ae7123f876357a81fc4c393239a378f1058cad5e (diff) | |
| download | blackbird-obmc-uboot-0dac4d51f50e9252dbc00075cf65eeba57017926.tar.gz blackbird-obmc-uboot-0dac4d51f50e9252dbc00075cf65eeba57017926.zip | |
dm: gpio: Add a driver GPIO translation method
Only the GPIO driver knows about the full GPIO device tree binding used by
a device. Add a method to allow the driver to provide this information to the
uclass, including the GPIO offset within the device and flags such as the
polarity.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-uclass.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c index 2f3c36b48f..0a4d9e4217 100644 --- a/drivers/gpio/gpio-uclass.c +++ b/drivers/gpio/gpio-uclass.c @@ -7,6 +7,7 @@ #include <common.h> #include <dm.h> #include <errno.h> +#include <fdtdec.h> #include <malloc.h> #include <asm/gpio.h> #include <linux/ctype.h> @@ -91,6 +92,21 @@ int gpio_lookup_name(const char *name, struct udevice **devp, return 0; } +int gpio_find_and_xlate(struct gpio_desc *desc, + struct fdtdec_phandle_args *args) +{ + struct dm_gpio_ops *ops = gpio_get_ops(desc->dev); + + /* Use the first argument as the offset by default */ + if (args->args_count > 0) + desc->offset = args->args[0]; + else + desc->offset = -1; + desc->flags = 0; + + return ops->xlate ? ops->xlate(desc->dev, desc, args) : 0; +} + static int dm_gpio_request(struct gpio_desc *desc, const char *label) { struct udevice *dev = desc->dev; |
