| Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Alexander Sverdlin | 67b2251 | 2011-01-19 21:22:06 +0300 | [diff] [blame] | 2 | /* |
| 3 | * Definitions for CS4271 ASoC codec driver |
| 4 | * |
| 5 | * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru> |
| Alexander Sverdlin | 67b2251 | 2011-01-19 21:22:06 +0300 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #ifndef __CS4271_H |
| 9 | #define __CS4271_H |
| 10 | |
| 11 | struct cs4271_platform_data { |
| 12 | int gpio_nreset; /* GPIO driving Reset pin, if any */ |
| Daniel Mack | 26047e2 | 2012-11-30 11:28:55 +0100 | [diff] [blame] | 13 | bool amutec_eq_bmutec; /* flag to enable AMUTEC=BMUTEC */ |
| Daniel Mack | fd23fb9 | 2012-12-10 10:30:04 +0100 | [diff] [blame] | 14 | |
| 15 | /* |
| 16 | * The CS4271 requires its LRCLK and MCLK to be stable before its RESET |
| 17 | * line is de-asserted. That also means that clocks cannot be changed |
| 18 | * without putting the chip back into hardware reset, which also requires |
| 19 | * a complete re-initialization of all registers. |
| 20 | * |
| 21 | * One (undocumented) workaround is to assert and de-assert the PDN bit |
| 22 | * in the MODE2 register. This workaround can be enabled with the |
| 23 | * following flag. |
| 24 | * |
| 25 | * Note that this is not needed in case the clocks are stable |
| 26 | * throughout the entire runtime of the codec. |
| 27 | */ |
| 28 | bool enable_soft_reset; |
| Alexander Sverdlin | 67b2251 | 2011-01-19 21:22:06 +0300 | [diff] [blame] | 29 | }; |
| 30 | |
| 31 | #endif /* __CS4271_H */ |