static int tz_osl_proc_write_info (
struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
TZ_CONTEXT *tz = NULL;
u32 state = 0;
u32 size = 0;
if (!buffer || (count==0) || !data) {
goto end;
}
tz = (TZ_CONTEXT*)data;
size = strlen(buffer);
if (size < 4)
goto end;
/* Cooling preference: "scp=0" (active) or "scp=1" (passive) */
if (0 == strncmp(buffer, "scp=", 4)) {
tz_set_cooling_preference(tz, (buffer[4] - '0'));
}
/* Polling frequency: "tzp=X" (poll every X [0-9] seconds) */
else if (0 == strncmp(buffer, "tzp=", 4)) {
tz->policy.polling_freq = (buffer[4] - '0') * 10;
tz_policy_check(tz);
}
end:
return count;
}
acpi_status
tz_add_device (
BM_HANDLE device_handle,
void **context)
{
acpi_status status = AE_OK;
TZ_CONTEXT *tz = NULL;
BM_DEVICE *device = NULL;
acpi_handle tmp_handle = NULL;
static u32 zone_count = 0;
FUNCTION_TRACE("tz_add_device");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Adding thermal zone [%02x].\n", device_handle));
if (!context || *context) {
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Invalid context for device [%02x].\n", device_handle));
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* Get information on this device.
*/
status = bm_get_device_info(device_handle, &device);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Allocate a new Thermal Zone device.
*/
tz = acpi_os_callocate(sizeof(TZ_CONTEXT));
if (!tz) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
tz->device_handle = device->handle;
tz->acpi_handle = device->acpi_handle;
/* TBD: How to manage 'uid' when zones are Pn_p? */
sprintf(tz->uid, "%d", zone_count++);
/*
* Temperature:
* ------------
* Make sure we can read the zone's current temperature (_TMP).
* If we can't, there's no use in doing any policy (abort).
*/
status = tz_get_temperature(tz);
if (ACPI_FAILURE(status))
goto end;
/*
* Polling Frequency:
* ------------------
* If _TZP doesn't exist use the OS default polling frequency.
*/
status = bm_evaluate_simple_integer(tz->acpi_handle, "_TZP", &(tz->policy.polling_freq));
if (ACPI_FAILURE(status)) {
tz->policy.polling_freq = TZP;
}
status = AE_OK;
/*
* Cooling Preference:
* -------------------
* Default to ACTIVE (noisy) cooling until policy decides otherwise.
* Note that _SCP is optional.
*/
tz_set_cooling_preference(tz, TZ_COOLING_MODE_ACTIVE);
/*
* Start Policy:
* -------------
* Thermal policy is included in the kernel (this driver) because
* of the critical role it plays in avoiding nuclear meltdown. =O
*/
status = tz_policy_add_device(tz);
if (ACPI_FAILURE(status))
goto end;
status = tz_osl_add_device(tz);
if (ACPI_FAILURE(status))
goto end;
*context = tz;
tz_print(tz);
end:
if (ACPI_FAILURE(status))
acpi_os_free(tz);
return_ACPI_STATUS(status);
}
