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Thermal: int3400 thermal: add capability to detect supporting UUIDs

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Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Zhang Rui 2014-03-23 23:34:26 +08:00
parent 816cab931f
commit c5738dddc0
1 changed files with 69 additions and 0 deletions
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69
drivers/thermal/int340x_thermal/int3400_thermal.c
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@ -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;