linux/drivers/acpi/acpica/exserial.c

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: exserial - field_unit support for serial address spaces
 *
 * Copyright (C) 2000 - 2023, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acdispat.h"
#include "acinterp.h"
#include "amlcode.h"

#define _COMPONENT …
ACPI_MODULE_NAME("exserial")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_read_gpio
 *
 * PARAMETERS:  obj_desc            - The named field to read
 *              buffer              - Where the return data is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Read from a named field that references a Generic Serial Bus
 *              field
 *
 ******************************************************************************/
acpi_status acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_write_gpio
 *
 * PARAMETERS:  source_desc         - Contains data to write. Expect to be
 *                                    an Integer object.
 *              obj_desc            - The named field
 *              result_desc         - Where the return value is returned, if any
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Write to a named field that references a General Purpose I/O
 *              field.
 *
 ******************************************************************************/

acpi_status
acpi_ex_write_gpio(union acpi_operand_object *source_desc,
		   union acpi_operand_object *obj_desc,
		   union acpi_operand_object **return_buffer)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_read_serial_bus
 *
 * PARAMETERS:  obj_desc            - The named field to read
 *              return_buffer       - Where the return value is returned, if any
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Read from a named field that references a serial bus
 *              (SMBus, IPMI, or GSBus).
 *
 ******************************************************************************/

acpi_status
acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
			union acpi_operand_object **return_buffer)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_write_serial_bus
 *
 * PARAMETERS:  source_desc         - Contains data to write
 *              obj_desc            - The named field
 *              return_buffer       - Where the return value is returned, if any
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Write to a named field that references a serial bus
 *              (SMBus, IPMI, GSBus).
 *
 ******************************************************************************/

acpi_status
acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
			 union acpi_operand_object *obj_desc,
			 union acpi_operand_object **return_buffer)
{ … }