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Add TEA5767 FM radio driver. From Karuna Grewal.
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| .\" $NetBSD: tea5767radio.4,v 1.1 2018/07/27 12:02:26 rkujawa Exp $ | ||
| .\" | ||
| .\" Copyright (c) 2018 The NetBSD Foundation, Inc. | ||
| .\" All rights reserved. | ||
| .\" | ||
| .\" This code is derived from software contributed to The NetBSD Foundation | ||
| .\" by Karuna Grewal. | ||
| .\" | ||
| .\" Redistribution and use in source and binary forms, with or without | ||
| .\" modification, are permitted provided that the following conditions | ||
| .\" are met: | ||
| .\" 1. Redistributions of source code must retain the above copyright | ||
| .\" notice, this list of conditions and the following disclaimer. | ||
| .\" 2. Redistributions in binary form must reproduce the above copyright | ||
| .\" notice, this list of conditions and the following disclaimer in the | ||
| .\" documentation and/or other materials provided with the distribution. | ||
| .\" | ||
| .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | ||
| .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | ||
| .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
| .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | ||
| .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| .\" POSSIBILITY OF SUCH DAMAGE. | ||
| .\" | ||
| .Dd July 6, 2018 | ||
| .Dt TEA5767RADIO | ||
| .Os | ||
| .Sh NAME | ||
| .Nm tea5767 | ||
| .Nd Philips/NXP TEA5767 FM Chip | ||
| .Sh SYNOPSIS | ||
| .Cd "tea5767radio* at iic? addr 0x60 flags 0x00" | ||
| .Cd "radio* at tea5767radio?" | ||
| .Sh DESCRIPTION | ||
| The | ||
| .Nm | ||
| driver provides support for the Philips/NXP TEA5767 FM stereo radio. | ||
| .Pp | ||
| The | ||
| .Nm | ||
| can tune in the range 87.5 \- 108.0 MHz, perform hardware signal search | ||
| and supports mono/stereo toggling. | ||
| .Pp | ||
| The flags control the FM Band, XTAL and PLL values as follows: | ||
| .Bl -tag -width Ds | ||
| .It 0x01 | ||
| sets the FM Band to Japan. | ||
| .It 0x02 | ||
| sets the PLL bit. | ||
| .It 0x04 | ||
| sets the XTAL bit. | ||
| .It 0x08 | ||
| force enables hardware search support. | ||
| .Sh SEE ALSO | ||
| .Xr iic 4 , | ||
| .Xr radio 4 , | ||
| .Xr radio 9 , | ||
| .Rs | ||
| .%A TEA5767 | ||
| .%T Low-power FM stereo radio | ||
| .%N Rev. 05 | ||
| .%D 26 January 2007 | ||
| .Re | ||
| .Sh CAVEATS | ||
| Many popular TEA5767 evaluation boards feature low quality 32.768kHz crystals. | ||
| The inaccuracy of these crystals may often lead to malfunction of the hardware | ||
| search funciton. | ||
| Therefore, the | ||
| .Nm | ||
| driver tries to detect the crystal quality during attachment. If the crystal | ||
| of insufficient accuracy was detected, hardware search function is disabled. | ||
| It can be forcefully re-enabled by setting the 0x08 flag. |
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