/* * Definitions for CS4271 ASoC codec driver * * Copyright (c) 2010 Alexander Sverdlin * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #ifndef __CS4271_H #define __CS4271_H struct cs4271_platform_data { int gpio_nreset; /* GPIO driving Reset pin, if any */ bool amutec_eq_bmutec; /* flag to enable AMUTEC=BMUTEC */ /* * The CS4271 requires its LRCLK and MCLK to be stable before its RESET * line is de-asserted. That also means that clocks cannot be changed * without putting the chip back into hardware reset, which also requires * a complete re-initialization of all registers. * * One (undocumented) workaround is to assert and de-assert the PDN bit * in the MODE2 register. This workaround can be enabled with the * following flag. * * Note that this is not needed in case the clocks are stable * throughout the entire runtime of the codec. */ bool enable_soft_reset; }; #endif /* __CS4271_H */ lumbingsTobias Klauser

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