| .. SPDX-License-Identifier: GPL-2.0-or-later |
| |
| Kernel driver lattepanda-sigma-ec |
| ================================= |
| |
| Supported systems: |
| |
| * LattePanda Sigma (Intel 13th Gen i5-1340P) |
| |
| DMI vendor: LattePanda |
| |
| DMI product: LattePanda Sigma |
| |
| BIOS version: 5.27 (verified) |
| |
| Datasheet: Not available (EC registers discovered empirically) |
| |
| Author: Mariano Abad <weimaraner@gmail.com> |
| |
| Description |
| ----------- |
| |
| This driver provides hardware monitoring for the LattePanda Sigma |
| single-board computer made by DFRobot. The board uses an ITE IT8613E |
| Embedded Controller to manage a CPU cooling fan and thermal sensors. |
| |
| The BIOS declares the ACPI Embedded Controller (``PNP0C09``) with |
| ``_STA`` returning 0, preventing the kernel's ACPI EC subsystem from |
| initializing. This driver reads the EC directly via the standard ACPI |
| EC I/O ports (``0x62`` data, ``0x66`` command/status). |
| |
| Sysfs attributes |
| ---------------- |
| |
| ======================= =============================================== |
| ``fan1_input`` Fan speed in RPM (EC registers 0x2E:0x2F, |
| 16-bit big-endian) |
| ``fan1_label`` "CPU Fan" |
| ``temp1_input`` Board/ambient temperature in millidegrees |
| Celsius (EC register 0x60, unsigned) |
| ``temp1_label`` "Board Temp" |
| ``temp2_input`` CPU proximity temperature in millidegrees |
| Celsius (EC register 0x70, unsigned) |
| ``temp2_label`` "CPU Temp" |
| ======================= =============================================== |
| |
| Module parameters |
| ----------------- |
| |
| ``force`` (bool, default false) |
| Force loading on BIOS versions other than 5.27. The driver still |
| requires DMI vendor and product name matching. |
| |
| Known limitations |
| ----------------- |
| |
| * Fan speed control is not supported. The fan is always under EC |
| automatic control. |
| * The EC register map was verified only on BIOS version 5.27. |
| Other versions may use different register offsets; use the ``force`` |
| parameter at your own risk. |
