1 What: /sys/bus/platform/devices/INTC1092:00/intc_reg 2 Date: August 2021 3 KernelVersion: 5.15 4 Contact: Shravan S <s.shravan@intel.com>, 5 An Sudhakar <sudhakar.an@intel.com> 6 Description: 7 Specific Absorption Rate (SAR) regulatory mode is typically 8 derived based on information like mcc (Mobile Country Code) and 9 mnc (Mobile Network Code) that is available for the currently 10 attached LTE network. A userspace application is required to set 11 the current SAR regulatory mode on the Dynamic SAR driver using 12 this sysfs node. Such an application can also read back using 13 this sysfs node, the currently configured regulatory mode value 14 from the Dynamic SAR driver. 15 16 Acceptable regulatory modes are: 17 == ==== 18 0 FCC 19 1 CE 20 2 ISED 21 == ==== 22 23 - The regulatory mode value has one of the above values. 24 - The default regulatory mode used in the driver is 0. 25 26 What: /sys/bus/platform/devices/INTC1092:00/intc_data 27 Date: August 2021 28 KernelVersion: 5.15 29 Contact: Shravan S <s.shravan@intel.com>, 30 An Sudhakar <sudhakar.an@intel.com> 31 Description: 32 This sysfs entry is used to retrieve Dynamic SAR information 33 emitted/maintained by a BIOS that supports Dynamic SAR. 34 35 The retrieved information is in the order given below: 36 - device_mode 37 - bandtable_index 38 - antennatable_index 39 - sartable_index 40 41 The above information is sent as integer values separated 42 by a single space. This information can then be pushed to a 43 WWAN modem that uses this to control the transmit signal 44 level using the Band/Antenna/SAR table index information. 45 These parameters are derived/decided by aggregating 46 device-mode like laptop/tablet/clamshell etc. and the 47 proximity-sensor data available to the embedded controller on 48 given host. The regulatory mode configured on Dynamic SAR 49 driver also influences these values. 50 51 The userspace applications can poll for changes to this file 52 using POLLPRI event on file-descriptor (fd) obtained by opening 53 this sysfs entry. Application can then read this information from 54 the sysfs node and consume the given information.
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