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e77125105b
Instead of unconditionally enabling the crystal oscillator on the WM8731 only enable it when explicitly selected via set_sysclk(), allowing machine drivers to specify that they drive a clock into MCLK alone. This avoids any conflicts between the oscillator and the external MCLK source and saves power for systems which do not need the oscillator. This should also deliver a small power saving on systems using the crystal since the oscillator will only be enabled when the ADC or DAC is active. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
40 lines
858 B
C
40 lines
858 B
C
/*
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* wm8731.h -- WM8731 Soc Audio driver
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*
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* Copyright 2005 Openedhand Ltd.
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*
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* Author: Richard Purdie <richard@openedhand.com>
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*
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* Based on wm8753.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _WM8731_H
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#define _WM8731_H
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/* WM8731 register space */
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#define WM8731_LINVOL 0x00
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#define WM8731_RINVOL 0x01
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#define WM8731_LOUT1V 0x02
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#define WM8731_ROUT1V 0x03
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#define WM8731_APANA 0x04
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#define WM8731_APDIGI 0x05
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#define WM8731_PWR 0x06
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#define WM8731_IFACE 0x07
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#define WM8731_SRATE 0x08
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#define WM8731_ACTIVE 0x09
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#define WM8731_RESET 0x0f
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#define WM8731_CACHEREGNUM 10
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#define WM8731_SYSCLK_XTAL 1
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#define WM8731_SYSCLK_MCLK 2
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#define WM8731_DAI 0
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#endif
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