| Charles Keepax | 422dcaf | 2019-01-30 11:41:26 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Lochnagar internals |
| 4 | * |
| 5 | * Copyright (c) 2013-2018 Cirrus Logic, Inc. and |
| 6 | * Cirrus Logic International Semiconductor Ltd. |
| 7 | * |
| 8 | * Author: Charles Keepax <ckeepax@opensource.cirrus.com> |
| 9 | */ |
| 10 | |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/mutex.h> |
| 13 | #include <linux/regmap.h> |
| 14 | |
| 15 | #ifndef CIRRUS_LOCHNAGAR_H |
| 16 | #define CIRRUS_LOCHNAGAR_H |
| 17 | |
| 18 | enum lochnagar_type { |
| 19 | LOCHNAGAR1, |
| 20 | LOCHNAGAR2, |
| 21 | }; |
| 22 | |
| 23 | /** |
| 24 | * struct lochnagar - Core data for the Lochnagar audio board driver. |
| 25 | * |
| 26 | * @type: The type of Lochnagar device connected. |
| 27 | * @dev: A pointer to the struct device for the main MFD. |
| 28 | * @regmap: The devices main register map. |
| 29 | * @analogue_config_lock: Lock used to protect updates in the analogue |
| 30 | * configuration as these must not be changed whilst the hardware is processing |
| 31 | * the last update. |
| 32 | */ |
| 33 | struct lochnagar { |
| 34 | enum lochnagar_type type; |
| 35 | struct device *dev; |
| 36 | struct regmap *regmap; |
| 37 | |
| 38 | /* Lock to protect updates to the analogue configuration */ |
| 39 | struct mutex analogue_config_lock; |
| 40 | }; |
| 41 | |
| 42 | /* Register Addresses */ |
| 43 | #define LOCHNAGAR_SOFTWARE_RESET 0x00 |
| 44 | #define LOCHNAGAR_FIRMWARE_ID1 0x01 |
| 45 | #define LOCHNAGAR_FIRMWARE_ID2 0x02 |
| 46 | |
| 47 | /* (0x0000) Software Reset */ |
| 48 | #define LOCHNAGAR_DEVICE_ID_MASK 0xFFFC |
| 49 | #define LOCHNAGAR_DEVICE_ID_SHIFT 2 |
| 50 | #define LOCHNAGAR_REV_ID_MASK 0x0003 |
| 51 | #define LOCHNAGAR_REV_ID_SHIFT 0 |
| 52 | |
| 53 | int lochnagar_update_config(struct lochnagar *lochnagar); |
| 54 | |
| 55 | #endif |