CPU Temperature sensor for Sama5d2

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Bens
Posts: 5
Joined: Tue Nov 15, 2016 2:50 pm

CPU Temperature sensor for Sama5d2

Tue Jan 31, 2017 7:28 pm

How can i check the CPU temperature for my board?
(currently unsure if it has a CPU temperature sensor)
sensors (from lm_sensors) did not find any sensors, but maybe i am missing a kernel module..

Board: Atmel Sama5d2 Xlpained Ultra rev.B
CPU: Sama5d27

uname -a:
Linux sama5d2-xplained-sd 4.4.26-linux4sam_5.5 #1 Fri Oct 21 15:02:23 CEST 2016 armv7l armv7l armv7l GNU/Linux
/proc/cpuinfo:
processor : 0
model name : ARMv7 Processor rev 1 (v7l)
BogoMIPS : 329.31
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 vfpd32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xc05
CPU revision : 1

Hardware : Atmel SAMA5
Revision : 0000
Serial : 0000000000000000
lsmod:
Module Size Used by
usb_f_acm 4128 1
u_serial 7814 1 usb_f_acm
g_serial 2308 0
libcomposite 32671 2 usb_f_acm,g_serial
atmel_isc 12775 0
videobuf2_dma_contig 8618 1 atmel_isc
videobuf2_memops 1076 1 videobuf2_dma_contig
videobuf2_v4l2 14743 1 atmel_isc
videobuf2_core 19204 2 atmel_isc,videobuf2_v4l2
atmel_usba_udc 14956 0
udc_core 7361 2 atmel_usba_udc,libcomposite
Thanks in advance.
blue_z
Location: USA
Posts: 1507
Joined: Thu Apr 19, 2007 10:15 pm

Re: CPU Temperature sensor for Sama5d2

Tue Jan 31, 2017 9:44 pm

Bens wrote:(currently unsure if it has a CPU temperature sensor)
Then you should have followed that train of thought, and performed a search for "temperature sensor" in the SoC datasheet.
Bens
Posts: 5
Joined: Tue Nov 15, 2016 2:50 pm

Re: CPU Temperature sensor for Sama5d2

Wed Feb 01, 2017 12:28 pm

blue_z wrote:
Bens wrote:(currently unsure if it has a CPU temperature sensor)
Then you should have followed that train of thought, and performed a search for "temperature sensor" in the SoC datasheet.
So allow me to clarify. I have actually done exactly that before posting my original post.
The main relevant reference to "temperature sensor" seems to be here:
19.3.2 Temperature Sensor Range Configuration Register
Name: SFRBU_TSRANGECFG
Address: 0xFC05C004
Access: Read/Write
TSHRSEL: Temperature Sensor Range Selection
0 (Reset value): Temperature Sensor High Triggering level is +105°C (internal transistor junction temperature).
1: Temperature Sensor High Triggering level is +115°C (internal transistor junction temperature).
I have not found a different reference for a register containing a temperature sensor value.
This led me to believe the board does not contain a CPU temperature sensor.
However i could have misunderstood the information in the Data Sheet, which is why i said i was unsure.

My original question still stands, and i would appreciate a clear answer.

Regards.
blue_z
Location: USA
Posts: 1507
Joined: Thu Apr 19, 2007 10:15 pm

Re: CPU Temperature sensor for Sama5d2

Thu Feb 02, 2017 12:55 am

The only information I have is the Atmel SoC datasheel, and the salient section is 61. Security Module.
You need to use a "secured version" of the SAMA5D2, and sign a NDA to obtain more information.
For descriptions of voltage monitors, frequency monitors, temperature sensors and die shield protections,
embedded on secured versions only, refer to datasheet “SAMA5D2 Security Module” (Atmel literature No. 44036),
available under Non-Disclosure Agreement (NDA). Contact an Atmel Sales Representative for details.
Regards

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