linux-imx
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committed 840c02ca221x
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0/****************************************************************************** * * Module Name: utids - support for device Ids - HID, UID, CID, SUB, CLS * * Copyright (C) 2000 - 2019, Intel Corp. * *****************************************************************************/ACPI_MODULE_NAME("utids")/******************************************************************************* * * FUNCTION: acpi_ut_execute_HID * * PARAMETERS: device_node - Node for the device * return_id - Where the string HID is returned * * RETURN: Status * * DESCRIPTION: Executes the _HID control method that returns the hardware * ID of the device. The HID is either an 32-bit encoded EISAID * Integer or a String. A string is always returned. An EISAID * is converted to a string. * * NOTE: Internal function, no parameter validation * ******************************************************************************/acpi_statusacpi_ut_execute_HID(struct acpi_namespace_node *device_node, struct acpi_pnp_device_id **return_id){ union acpi_operand_object *obj_desc; struct acpi_pnp_device_id *hid; u32 length; acpi_status status; ACPI_FUNCTION_TRACE(ut_execute_HID); status = acpi_ut_evaluate_object(device_node, METHOD_NAME__HID, ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Get the size of the String to be returned, includes null terminator */ if (obj_desc->common.type == ACPI_TYPE_INTEGER) { length = ACPI_EISAID_STRING_SIZE; } else { length = obj_desc->string.length + 1; } /* Allocate a buffer for the HID */ hid = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) + (acpi_size)length); if (!hid) { status = AE_NO_MEMORY; goto cleanup; } /* Area for the string starts after PNP_DEVICE_ID struct */ hid->string = ACPI_ADD_PTR(char, hid, sizeof(struct acpi_pnp_device_id)); /* Convert EISAID to a string or simply copy existing string */ if (obj_desc->common.type == ACPI_TYPE_INTEGER) { acpi_ex_eisa_id_to_string(hid->string, obj_desc->integer.value); } else { strcpy(hid->string, obj_desc->string.pointer); } hid->length = length; *return_id = hid;cleanup: /* On exit, we must delete the return object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status);}