Thermal: int3400 thermal: add capability to detect supporting UUIDs (c5738ddd) · Commits · EulixOS / Software / Kernel

drivers/thermal/int340x_thermal/int3400_thermal.c

+69 −0

Original line number	Diff line number	Diff line
		@@ -41,14 +41,79 @@ struct trt {
		u64 reverved4;
		};

		enum int3400_thermal_uuid {
		INT3400_THERMAL_PASSIVE_1,
		INT3400_THERMAL_PASSIVE_2,
		INT3400_THERMAL_ACTIVE,
		INT3400_THERMAL_CRITICAL,
		INT3400_THERMAL_COOLING_MODE,
		INT3400_THERMAL_MAXIMUM_UUID,
		};

		static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
		"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
		"9E04115A-AE87-4D1C-9500-0F3E340BFE75",
		"3A95C389-E4B8-4629-A526-C52C88626BAE",
		"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
		"16CAF1B7-DD38-40ed-B1C1-1B8A1913D531",
		};

		struct int3400_thermal_priv {
		struct acpi_device *adev;
		int art_count;
		struct art *arts;
		int trt_count;
		struct trt *trts;
		u8 uuid_bitmap;
		};

		static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
		{
		struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL};
		union acpi_object obja, objb;
		int i, j;
		int result = 0;
		acpi_status status;

		status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf);
		if (ACPI_FAILURE(status))
		return -ENODEV;

		obja = (union acpi_object *)buf.pointer;
		if (obja->type != ACPI_TYPE_PACKAGE) {
		result = -EINVAL;
		goto end;
		}

		for (i = 0; i < obja->package.count; i++) {
		objb = &obja->package.elements[i];
		if (objb->type != ACPI_TYPE_BUFFER) {
		result = -EINVAL;
		goto end;
		}

		/* UUID must be 16 bytes */
		if (objb->buffer.length != 16) {
		result = -EINVAL;
		goto end;
		}

		for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
		u8 uuid[16];

		acpi_str_to_uuid(int3400_thermal_uuids[j], uuid);
		if (!strncmp(uuid, objb->buffer.pointer, 16)) {
		priv->uuid_bitmap \|= (1 << j);
		break;
		}
		}
		}

		end:
		kfree(buf.pointer);
		return result;
		}

		static int parse_art(struct int3400_thermal_priv *priv)
		{
		acpi_handle handle = priv->adev->handle;
		@@ -193,6 +258,10 @@ static int int3400_thermal_probe(struct platform_device *pdev)

		priv->adev = adev;

		result = int3400_thermal_get_uuids(priv);
		if (result)
		goto free_priv;

		result = parse_art(priv);
		if (result)
		goto free_priv;