1.\" $NetBSD: tea5767radio.4,v 1.3 2020/08/28 16:07:49 fcambus Exp $ 2.\" 3.\" Copyright (c) 2018 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Karuna Grewal. 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 July 6, 2018 31.Dt TEA5767RADIO 4 32.Os 33.Sh NAME 34.Nm tea5767 35.Nd Philips/NXP TEA5767 FM Chip 36.Sh SYNOPSIS 37.Cd "tea5767radio* at iic? addr 0x60 flags 0x00" 38.Cd "radio* at tea5767radio?" 39.Sh DESCRIPTION 40The 41.Nm 42driver provides support for the Philips/NXP TEA5767 FM stereo radio. 43.Pp 44The 45.Nm 46can tune in the range 87.5 \- 108.0 MHz, perform hardware signal search 47and supports mono/stereo toggling. 48.Pp 49The flags control the FM Band, XTAL, and PLL values as follows: 50.Bl -tag -width Ds 51.It 0x01 52Sets the FM Band to Japan. 53.It 0x02 54Sets the PLL bit. 55.It 0x04 56Sets the XTAL bit. 57.It 0x08 58Force enables hardware search support. 59.El 60.Sh SEE ALSO 61.Xr iic 4 , 62.Xr radio 4 , 63.Xr radio 9 64.Rs 65.%A TEA5767 66.%T Low-power FM stereo radio 67.%N Rev. 05 68.%D 26 January 2007 69.Re 70.Sh CAVEATS 71Many popular TEA5767 evaluation boards feature low quality 32.768kHz crystals. 72The inaccuracy of these crystals may often lead to malfunction of the hardware 73search function. 74Therefore, the 75.Nm 76driver tries to detect the crystal quality during attachment. 77If the crystal 78of insufficient accuracy was detected, the hardware search function is disabled. 79It can be forcefully re-enabled by setting the 0x08 flag. 80