MCS_PLL_CONFIG_REG
ret = wl12xx_top_reg_write(wl, MCS_PLL_CONFIG_REG,
ret = wl12xx_top_reg_read(wl, MCS_PLL_CONFIG_REG, &pll_config);
ret = wl12xx_top_reg_write(wl, MCS_PLL_CONFIG_REG, pll_config);