162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * cxd2880_common.c 462306a36Sopenharmony_ci * Sony CXD2880 DVB-T2/T tuner + demodulator driver 562306a36Sopenharmony_ci * common functions 662306a36Sopenharmony_ci * 762306a36Sopenharmony_ci * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation 862306a36Sopenharmony_ci */ 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#include "cxd2880_common.h" 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ciint cxd2880_convert2s_complement(u32 value, u32 bitlen) 1362306a36Sopenharmony_ci{ 1462306a36Sopenharmony_ci if (!bitlen || bitlen >= 32) 1562306a36Sopenharmony_ci return (int)value; 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci if (value & (u32)(1 << (bitlen - 1))) 1862306a36Sopenharmony_ci return (int)(GENMASK(31, bitlen) | value); 1962306a36Sopenharmony_ci else 2062306a36Sopenharmony_ci return (int)(GENMASK(bitlen - 1, 0) & value); 2162306a36Sopenharmony_ci} 22