1.\" $NetBSD: mpl115a.4,v 1.2 2013/09/09 08:23:54 wiz Exp $ 2.\" 3.\" Copyright (c) 2013 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Radoslaw Kujawa. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd September 8, 2013 31.Dt MPL115A 4 32.Os 33.Sh NAME 34.Nm mpl115a 35.Nd Freescale MPL115A2 absolute pressure sensor driver 36.Sh SYNOPSIS 37.Cd "mpl115a* at iic? addr 0x60" 38.Sh DESCRIPTION 39The 40.Nm 41driver provides support for the MPL115A2 pressure sensor. 42It allows reporting absolute pressure through the 43.Xr envsys 4 44API. 45.Sh SEE ALSO 46.Xr envsys 4 47.Sh HISTORY 48The 49.Nm 50device first appeared in 51.Nx 7.0 . 52.Sh AUTHORS 53.An -nosplit 54The 55.Nm 56driver was written by 57.An Radoslaw Kujawa Aq radoslaw.kujawa@gmail.com . 58The fixed-point pressure calculation algorithm was suggested by 59.An Matt Thomas . 60.Sh CAVEATS 61The MPL115A2 chip has an accuracy of +/- 1 kPa, which makes it not very useful 62for weather-related applications. 63.Pp 64The 65.Xr envsys 4 66API does not support pressure reporting yet, so the result is reported just as 67integer number. 68