include/sound/cs4271.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Definitions for CS4271 ASoC codec driver
   4  *
   5  * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
   6  */
   7
   8 #ifndef __CS4271_H
   9 #define __CS4271_H
  10
  11 struct cs4271_platform_data {
  12         bool amutec_eq_bmutec;  /* flag to enable AMUTEC=BMUTEC */
  13
  14         /*
  15          * The CS4271 requires its LRCLK and MCLK to be stable before its RESET
  16          * line is de-asserted. That also means that clocks cannot be changed
  17          * without putting the chip back into hardware reset, which also requires
  18          * a complete re-initialization of all registers.
  19          *
  20          * One (undocumented) workaround is to assert and de-assert the PDN bit
  21          * in the MODE2 register. This workaround can be enabled with the
  22          * following flag.
  23          *
  24          * Note that this is not needed in case the clocks are stable
  25          * throughout the entire runtime of the codec.
  26          */
  27         bool enable_soft_reset;
  28 };
  29
  30 #endif /* __CS4271_H */