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