axp288_charger_reg_readb
ret = axp288_charger_reg_readb(info, AXP20X_PWR_INPUT_STATUS, &info->input_status);
ret = axp288_charger_reg_readb(info, AXP20X_PWR_OP_MODE, &info->op_mode);
ret = axp288_charger_reg_readb(info, AXP20X_CHRG_BAK_CTRL, &info->backend_control);