On Thu, Aug 29, 2019 at 02:43:18PM +0200, Ahmad Fatoum wrote: > Sometimes we need to wait for state change on a GPIO, > provide a helper to do this. > > Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> > --- > include/gpio.h | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/include/gpio.h b/include/gpio.h > index 1926edeca757..89cb306a195c 100644 > --- a/include/gpio.h > +++ b/include/gpio.h > @@ -3,6 +3,7 @@ > > #include <linux/types.h> > #include <linux/list.h> > +#include <linux/iopoll.h> > > #ifdef CONFIG_GENERIC_GPIO > void gpio_set_value(unsigned gpio, int value); > @@ -31,6 +32,13 @@ static inline int gpio_direction_input(unsigned gpio) > void gpio_set_active(unsigned gpio, bool state); > int gpio_is_active(unsigned gpio); > int gpio_direction_active(unsigned gpio, bool state); > + > +#define gpio_poll_timeout_us(gpio, active, timeout_us) \ Please add a comment what this macro does. Specificall it's interesting to know if this function polls as long as the gpio is active or if it polls until it's active. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
