On 5 January 2015 at 20:05, Simon Glass <s...@chromium.org> wrote: > At present U-Boot sort-of supports the standard way of reading GPIOs from > device tree nodes, but the support is incomplete, a bit clunky and only > works for GPIO bindings where #gpio-cells is 2. > > Add new functions to request GPIOs, taking full account of the device > tree binding. These permit requesting a GPIO with a simple call like: > > gpio_request_by_name(dev, "cd-gpios", 0, &desc, GPIOD_IS_IN); > > This will request the GPIO, looking at the device's node which might be > this, for example: > > cd-gpios = <&gpio TEGRA_GPIO(B, 3) GPIO_ACTIVE_LOW>; > > The GPIO will be set to input mode in this case and polarity will be > honoured by the GPIO calls. > > It is also possible to request and free a list of GPIOs. > > Signed-off-by: Simon Glass <s...@chromium.org> > --- > > drivers/gpio/gpio-uclass.c | 166 ++++++++++++++++++++++++++++++++++++- > drivers/gpio/sandbox.c | 20 +++++ > include/asm-generic/gpio.h | 199 > +++++++++++++++++++++++++++++++++++++++++++++ > test/dm/gpio.c | 69 +++++++++++++++- > test/dm/test.dts | 11 ++- > 5 files changed, 461 insertions(+), 4 deletions(-)
Applied to u-boot-dm. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
