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