22 lines
530 B
C
22 lines
530 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Some small helpers for older Cirrus Logic parts.
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*
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* Copyright (C) 2021 Cirrus Logic, Inc. and
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* Cirrus Logic International Semiconductor Ltd.
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*/
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static inline int cirrus_read_device_id(struct regmap *regmap, unsigned int reg)
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{
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u8 devid[3];
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int ret;
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ret = regmap_bulk_read(regmap, reg, devid, ARRAY_SIZE(devid));
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if (ret < 0)
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return ret;
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return ((devid[0] & 0xFF) << 12) |
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((devid[1] & 0xFF) << 4) |
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((devid[2] & 0xF0) >> 4);
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}
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