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54 lines
2.0 KiB
54 lines
2.0 KiB
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 <[email protected]>, |
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An Sudhakar <[email protected]> |
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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 <[email protected]>, |
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An Sudhakar <[email protected]> |
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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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