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authorZhang Rui <rui.zhang@intel.com>2014-03-23 23:34:26 +0800
committerZhang Rui <rui.zhang@intel.com>2014-10-10 13:57:10 +0800
commitc5738dddc01be49cf6712f886371177e8df36291 (patch)
tree8b82b59db21a16943f4d4d4af143120e0335300f /drivers/thermal/int340x_thermal
parent816cab931f288c92a3404b1b984576f4822b0445 (diff)
Thermal: int3400 thermal: add capability to detect supporting UUIDs
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/int340x_thermal')
-rw-r--r--drivers/thermal/int340x_thermal/int3400_thermal.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
index 308c1850edee..65c63ba8b314 100644
--- a/drivers/thermal/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
@@ -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;