Realtek-2-power limit_txpwr_lmt.txt

RTK 有一套power limit机制，在不同区域，限制各个制式下、各个信道的最大power，

降sar 是依据场景不同，进行功率降低，这个有所不同。

1.优先从TXPWR_LMT.txt  获取power limit 参数

2.如果没有TXPWR_LMT.txt ，则从代码里获取，流程如下

以8822cs 为例，加载驱动时：

rtl8822cs/os_dep/linux/os_intfs.c

    rtw_init_drv_sw

         rtw_hal_dm_init(padapter)

rtl8822cs/hal/hal_intf.c

    rtw_hal_dm_init

        phy_load_tx_power_ext_info

rtl8822cs/hal/hal_com_phycfg.c

    phy_load_tx_power_ext_info

        phy_load_tx_power_limit

             // Start with TXPWR_LMT.txt Get parameters

             PHY_ConfigRFWithPowerLimitTableParaFile(adapter, PHY_FILE_TXPWR_LMT)

             // Failed to obtain parameters from file, then obtain default values from code

             odm_config_rf_with_header_file(&hal_data->odmpriv, CONFIG_RF_TXPWR_LMT, RF_PATH_A)

rtl8822cs/hal/phydm/phydm_hwconfig.c

    odm_config_rf_with_header_file

        READ_AND_CONFIG_MP(8822c, _txpwr_lmt)

rtl8822cs/hal/phydm/halrf/rtl8822c/halhwimg8822c_rf.c

    odm_read_and_config_mp_8822c_txpwr_lmt

const struct txpwr_lmt_t_8822c array_mp_8822c_txpwr_lmt[] = {
    {PW_LMT_REGU_FCC, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 72},
    {PW_LMT_REGU_ETSI, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 60},
    {PW_LMT_REGU_MKK, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 68},
    {PW_LMT_REGU_IC, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 72},
    {PW_LMT_REGU_KCC, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 76},
    {PW_LMT_REGU_ACMA, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 60},
    {PW_LMT_REGU_CHILE, PW_LMT_BAND_2_4G, PW_LMT_BW_20M, PW_LMT_RS_CCK, PW_LMT_PH_1T, 1, 72},