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55 lines
2.0 KiB
Plaintext
55 lines
2.0 KiB
Plaintext
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What: /sys/bus/platform/devices/INTC1092:00/intc_reg
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Date: August 2021
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KernelVersion: 5.15
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Contact: Shravan S <s.shravan@intel.com>,
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An Sudhakar <sudhakar.an@intel.com>
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Description:
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Specific Absorption Rate (SAR) regulatory mode is typically
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derived based on information like mcc (Mobile Country Code) and
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mnc (Mobile Network Code) that is available for the currently
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attached LTE network. A userspace application is required to set
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the current SAR regulatory mode on the Dynamic SAR driver using
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this sysfs node. Such an application can also read back using
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this sysfs node, the currently configured regulatory mode value
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from the Dynamic SAR driver.
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Acceptable regulatory modes are:
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== ====
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0 FCC
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1 CE
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2 ISED
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== ====
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- The regulatory mode value has one of the above values.
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- The default regulatory mode used in the driver is 0.
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What: /sys/bus/platform/devices/INTC1092:00/intc_data
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Date: August 2021
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KernelVersion: 5.15
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Contact: Shravan S <s.shravan@intel.com>,
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An Sudhakar <sudhakar.an@intel.com>
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Description:
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This sysfs entry is used to retrieve Dynamic SAR information
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emitted/maintained by a BIOS that supports Dynamic SAR.
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The retrieved information is in the order given below:
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- device_mode
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- bandtable_index
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- antennatable_index
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- sartable_index
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The above information is sent as integer values separated
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by a single space. This information can then be pushed to a
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WWAN modem that uses this to control the transmit signal
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level using the Band/Antenna/SAR table index information.
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These parameters are derived/decided by aggregating
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device-mode like laptop/tablet/clamshell etc. and the
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proximity-sensor data available to the embedded controller on
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given host. The regulatory mode configured on Dynamic SAR
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driver also influences these values.
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The userspace applications can poll for changes to this file
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using POLLPRI event on file-descriptor (fd) obtained by opening
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this sysfs entry. Application can then read this information from
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the sysfs node and consume the given information.
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