From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i3YMz-00008c-6q for barebox@lists.infradead.org; Fri, 30 Aug 2019 04:18:42 +0000 Date: Fri, 30 Aug 2019 06:18:35 +0200 From: Oleksij Rempel Message-ID: <20190830041835.yiga65keg7p2sgr2@pengutronix.de> References: <20190829124318.30339-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190829124318.30339-1-a.fatoum@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH] gpio: iopoll: implement gpio_poll_timeout_us To: Ahmad Fatoum Cc: barebox@lists.infradead.org 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 > --- > 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 > #include > +#include > > #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) \ > + ({ \ > + int __state; \ > + readx_poll_timeout(gpio_is_active, gpio, __state, \ > + __state == (active), timeout_us); \ > + }) > #else > static inline void gpio_set_active(unsigned gpio, int value) > { > @@ -43,6 +51,8 @@ static inline int gpio_direction_active(unsigned gpio, int value) > { > return -EINVAL; > } > + > +#define gpio_poll_timeout_us(gpio, val, timeout_us) (-ENOSYS) > #endif > > #if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0 Do we already have some thing using this function? -- 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@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox