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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2021-2023 Realtek Corporation
*/
#include <linux/acpi.h>
#include <linux/uuid.h>
#include "acpi.h"
#include "debug.h"
static const guid_t rtw89_guid = GUID_INIT(0xD2A8C3E8, 0x4B69, 0x4F00,
0x82, 0xBD, 0xFE, 0x86,
0x07, 0x80, 0x3A, 0xA7);
static int rtw89_acpi_dsm_get(struct rtw89_dev *rtwdev, union acpi_object *obj,
u8 *value)
{
switch (obj->type) {
case ACPI_TYPE_INTEGER:
*value = (u8)obj->integer.value;
break;
case ACPI_TYPE_BUFFER:
*value = obj->buffer.pointer[0];
break;
default:
rtw89_debug(rtwdev, RTW89_DBG_UNEXP,
"acpi dsm return unhandled type: %d\n", obj->type);
return -EINVAL;
}
return 0;
}
int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev,
enum rtw89_acpi_dsm_func func, u8 *value)
{
union acpi_object *obj;
int ret;
obj = acpi_evaluate_dsm(ACPI_HANDLE(rtwdev->dev), &rtw89_guid,
0, func, NULL);
if (!obj) {
rtw89_debug(rtwdev, RTW89_DBG_UNEXP,
"acpi dsm fail to evaluate func: %d\n", func);
return -ENOENT;
}
ret = rtw89_acpi_dsm_get(rtwdev, obj, value);
ACPI_FREE(obj);
return ret;
}
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