| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Lochnagar internals |
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| 4 | * |
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| 5 | * Copyright (c) 2013-2018 Cirrus Logic, Inc. and |
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| 6 | * Cirrus Logic International Semiconductor Ltd. |
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| 7 | * |
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| 8 | * Author: Charles Keepax <ckeepax@opensource.cirrus.com> |
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| 9 | */ |
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| 10 | |
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| 11 | #include <linux/device.h> |
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| 12 | #include <linux/mutex.h> |
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| 13 | #include <linux/regmap.h> |
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| 14 | |
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| 15 | #ifndef CIRRUS_LOCHNAGAR_H |
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| 16 | #define CIRRUS_LOCHNAGAR_H |
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| 17 | |
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| 18 | enum lochnagar_type { |
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| 19 | LOCHNAGAR1, |
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| 20 | LOCHNAGAR2, |
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| 21 | }; |
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| 22 | |
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| 23 | /** |
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| 24 | * struct lochnagar - Core data for the Lochnagar audio board driver. |
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| 25 | * |
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| 26 | * @type: The type of Lochnagar device connected. |
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| 27 | * @dev: A pointer to the struct device for the main MFD. |
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| 28 | * @regmap: The devices main register map. |
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| 29 | * @analogue_config_lock: Lock used to protect updates in the analogue |
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| 30 | * configuration as these must not be changed whilst the hardware is processing |
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| 31 | * the last update. |
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| 32 | */ |
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| 33 | struct lochnagar { |
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| 34 | enum lochnagar_type type; |
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| 35 | struct device *dev; |
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| 36 | struct regmap *regmap; |
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| 37 | |
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| 38 | /* Lock to protect updates to the analogue configuration */ |
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| 39 | struct mutex analogue_config_lock; |
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| 40 | }; |
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| 41 | |
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| 42 | /* Register Addresses */ |
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| 43 | #define LOCHNAGAR_SOFTWARE_RESET 0x00 |
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| 44 | #define LOCHNAGAR_FIRMWARE_ID1 0x01 |
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| 45 | #define LOCHNAGAR_FIRMWARE_ID2 0x02 |
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| 46 | |
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| 47 | /* (0x0000) Software Reset */ |
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| 48 | #define LOCHNAGAR_DEVICE_ID_MASK 0xFFFC |
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| 49 | #define LOCHNAGAR_DEVICE_ID_SHIFT 2 |
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| 50 | #define LOCHNAGAR_REV_ID_MASK 0x0003 |
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| 51 | #define LOCHNAGAR_REV_ID_SHIFT 0 |
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| 52 | |
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| 53 | int lochnagar_update_config(struct lochnagar *lochnagar); |
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| 54 | |
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| 55 | #endif |
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| 56 | |
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