Commit a28b088e authored by Mariano Abad's avatar Mariano Abad Committed by Guenter Roeck
Browse files

hwmon: Add LattePanda Sigma EC driver 



Add hardware monitoring support for the LattePanda Sigma SBC
(DFRobot, ITE IT8613E EC). The driver reads fan speed and
temperatures via direct port I/O, as the BIOS disables the
ACPI EC interface.

Signed-off-by: default avatarMariano Abad <weimaraner@gmail.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent afc6c4ae

Documentation/hwmon/index.rst

+1 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ Hardware Monitoring Kernel Drivers 
   kbatt

   kfan

   lan966x

   lattepanda-sigma-ec

   lineage-pem

   lm25066

   lm63

Documentation/hwmon/lattepanda-sigma-ec.rst

0 → 100644
+61 −0
Original line number Diff line number Diff line 
.. 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.

MAINTAINERS

+7 −0
Original line number Diff line number Diff line
@@ -14421,6 +14421,13 @@ F: drivers/net/wan/framer/ 
F:	drivers/pinctrl/pinctrl-pef2256.c

F:	include/linux/framer/









LATTEPANDA SIGMA EC HARDWARE MONITOR DRIVER









M:	Mariano Abad <weimaraner@gmail.com>









L:	linux-hwmon@vger.kernel.org









S:	Maintained









F:	Documentation/hwmon/lattepanda-sigma-ec.rst









F:	drivers/hwmon/lattepanda-sigma-ec.c

















LASI 53c700 driver for PARISC









M:	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>









L:	linux-scsi@vger.kernel.org
































drivers/hwmon/Kconfig



+17
−0






























Original line number
Diff line number
Diff line







@@ -964,6 +964,23 @@ config SENSORS_LAN966X







	  This driver can also be built as a module. If so, the module









	  will be called lan966x-hwmon.



















config SENSORS_LATTEPANDA_SIGMA_EC









	tristate "LattePanda Sigma EC hardware monitoring"









	depends on X86









	depends on DMI









	depends on HAS_IOPORT









	help









	  If you say yes here you get support for the hardware monitoring









	  features of the Embedded Controller on LattePanda Sigma









	  single-board computers, including CPU fan speed (RPM) and









	  board and CPU temperatures.



















	  The driver reads the EC directly via ACPI EC I/O ports and









	  uses DMI matching to ensure it only loads on supported hardware.



















	  This driver can also be built as a module. If so, the module









	  will be called lattepanda-sigma-ec.



















config SENSORS_LENOVO_EC









        tristate "Sensor reader for Lenovo ThinkStations"









        depends on X86
































drivers/hwmon/Makefile



+1
−0






























Original line number
Diff line number
Diff line







@@ -113,6 +113,7 @@ obj-$(CONFIG_SENSORS_K10TEMP)	+= k10temp.o







obj-$(CONFIG_SENSORS_KBATT)	+= kbatt.o









obj-$(CONFIG_SENSORS_KFAN)	+= kfan.o









obj-$(CONFIG_SENSORS_LAN966X)	+= lan966x-hwmon.o









obj-$(CONFIG_SENSORS_LATTEPANDA_SIGMA_EC) += lattepanda-sigma-ec.o









obj-$(CONFIG_SENSORS_LENOVO_EC)	+= lenovo-ec-sensors.o









obj-$(CONFIG_SENSORS_LINEAGE)	+= lineage-pem.o









obj-$(CONFIG_SENSORS_LOCHNAGAR)	+= lochnagar-hwmon.o