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