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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-11-07 02:42:08 +0300 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-11-07 02:42:08 +0300 |
commit | cdd5b5a9761fd66d17586e4f4ba6588c70e640ea (patch) | |
tree | aba8409818be01f6af8683bf76594c790942d0bc /drivers/net/wireless/realtek/rtw89/acpi.c | |
parent | 5c15c60e7be615f05a45cd905093a54b11f461bc (diff) | |
parent | 28d3fe32354701decc3e76d89712569c269b5e4f (diff) | |
download | linux-cdd5b5a9761fd66d17586e4f4ba6588c70e640ea.tar.xz |
Merge branch 'next' into for-linus
Prepare input updates for 6.7 merge window.
Diffstat (limited to 'drivers/net/wireless/realtek/rtw89/acpi.c')
-rw-r--r-- | drivers/net/wireless/realtek/rtw89/acpi.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw89/acpi.c b/drivers/net/wireless/realtek/rtw89/acpi.c new file mode 100644 index 000000000000..8aaf83a2a6b4 --- /dev/null +++ b/drivers/net/wireless/realtek/rtw89/acpi.c @@ -0,0 +1,52 @@ +// 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; +} |