| // SPDX-License-Identifier: GPL-2.0 | |
| /* | |
| * cxd2880_common.c | |
| * Sony CXD2880 DVB-T2/T tuner + demodulator driver | |
| * common functions | |
| * | |
| * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation | |
| */ | |
| #include "cxd2880_common.h" | |
| int cxd2880_convert2s_complement(u32 value, u32 bitlen) | |
| { | |
| if (!bitlen || bitlen >= 32) | |
| return (int)value; | |
| if (value & (u32)(1 << (bitlen - 1))) | |
| return (int)(GENMASK(31, bitlen) | value); | |
| else | |
| return (int)(GENMASK(bitlen - 1, 0) & value); | |
| } |