From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Klinger Subject: [PATCH v3 1/2] iio: distance: add dt binding for devantech-srf04 Date: Tue, 31 Jan 2017 19:03:06 +0100 Message-ID: <20170131180306.GA12880@andreas> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-iio-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, knaack.h-Mmb7MZpHnFY@public.gmane.org, lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org, pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, shraddha.6596-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, w@1wt.eu, balbi-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, sjenning-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, ksenija.stanojevic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, vilhelm.gray-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: ak-n176/SwNRljddJNmlsFzeA@public.gmane.org List-Id: devicetree@vger.kernel.org This patch adds dt binding for devantech ultrasonic ranger srf04. The vendor "devantech" was already added to the vendor list with "[PATCH v4 1/3] iio: distance: srf08: add trivial DT binding" Signed-off-by: Andreas Klinger --- .../bindings/iio/proximity/devantech-srf04.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt diff --git a/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt new file mode 100644 index 000000000000..d4dc7a227e2e --- /dev/null +++ b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt @@ -0,0 +1,28 @@ +* Devantech SRF04 ultrasonic range finder + Bit-banging driver using two GPIOs + +Required properties: + - compatible: Should be "devantech,srf04" + + - trig-gpios: Definition of the GPIO for the triggering (output) + This GPIO is set for about 10 us by the driver to tell the + device it should initiate the measurement cycle. + + - echo-gpios: Definition of the GPIO for the echo (input) + This GPIO is set by the device as soon as an ultrasonic + burst is sent out and reset when the first echo is + received. + Thus this GPIO is set while the ultrasonic waves are doing + one round trip. + It needs to be an GPIO which is able to deliver an + interrupt because the time between two interrupts is + measured in the driver. + See Documentation/devicetree/bindings/gpio/gpio.txt for + information on how to specify a consumer gpio. + +Example: +srf04@0 { + compatible = "devantech,srf04"; + trig-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>; + echo-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>; +}; -- 2.1.4