1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Some small helpers for older Cirrus Logic parts.
4  *
5  * Copyright (C) 2021 Cirrus Logic, Inc. and
6  *                    Cirrus Logic International Semiconductor Ltd.
7  */
8 
cirrus_read_device_id(struct regmap * regmap,unsigned int reg)9 static inline int cirrus_read_device_id(struct regmap *regmap, unsigned int reg)
10 {
11 	u8 devid[3];
12 	int ret;
13 
14 	ret = regmap_bulk_read(regmap, reg, devid, ARRAY_SIZE(devid));
15 	if (ret < 0)
16 		return ret;
17 
18 	return ((devid[0] & 0xFF) << 12) |
19 	       ((devid[1] & 0xFF) <<  4) |
20 	       ((devid[2] & 0xF0) >>  4);
21 }
22