From c5738dddc01be49cf6712f886371177e8df36291 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Sun, 23 Mar 2014 23:34:26 +0800 Subject: Thermal: int3400 thermal: add capability to detect supporting UUIDs Signed-off-by: Zhang Rui --- drivers/thermal/int340x_thermal/int3400_thermal.c | 69 +++++++++++++++++++++++ 1 file changed, 69 insertions(+) (limited to 'drivers/thermal/int340x_thermal') 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; -- cgit v1.2.3