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Hi Andrei,</div>
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Thanks for your prompt reply and the explanation of #2, I understood now. </div>
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For <span style="background-color:rgb(255, 255, 255);display:inline !important">question #1, l</span>et me rephrase it, please. I mean the temperature value I read is always the same. The value always shows 40.187, it wouldn't be changed even I read it again
after a while. But if I declare the temp sensors on the I2C bus node in my dts, the value will change all the time. Do you have any idea about this?
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Regards,</div>
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Chris Chen</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>ÐöËìíº:</b> Andrei Kartashev <a.kartashev@yadro.com><br>
<b>ÐöËììíÑ¢:</b> 2021Ò´10êÅ29ìí ù»çí 04:33<br>
<b>â¥Ëìíº:</b> Chris Chen (TPI) <Chris.Chen3@flex.com>; openbmc@lists.ozlabs.org <openbmc@lists.ozlabs.org><br>
<b>ñ«ò©:</b> Re: [entity-manager] Question about temperature sensor stops update</font>
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<div class="PlainText">Hello,<br>
<br>
I didn't catch, what is your problem. As I see from the logs,<br>
everything is fine: temp sensors instantiated, dbus objects created,<br>
readings present. What's wrong?<br>
<br>
As for FruDevice: yes, it's kind of weird behaviour: it exposes not<br>
only actual FRU devices but also other I2C devices. You can introspect<br>
that objects and see that they exposes<br>
xyz.openbmc_project.Inventory.Item.I2CDevice interface instead of<br>
xyz.openbmc_project.FruDevice<br>
<br>
On Fri, 2021-10-29 at 08:02 +0000, Chris Chen (TPI) wrote:FruDevice<br>
> Hi everyone,<br>
> <br>
> Actually, I have 2 questions as below:<br>
> 1. I got understood from others on the mailing list, that I don't<br>
> have to declare EEPROM or temp sensors on the I2C bus node in my dts,<br>
> and it should be fine even I did it at the beginning. So I tried to<br>
> remove this declaration in dts, then the sensor value I got is fixed,<br>
> no update. Can someone help to take look at why it is?<br>
> Here are some logs that appeared automatically after the<br>
> system booted up. It looks like that entity-manager works fine. And<br>
> the commands I used to check value.<br>
> =======================================<br>
> [ 23.713596] lm75 6-0049: hwmon1: sensor 'tmp75'<br>
> [ 23.718894] i2c i2c-6: new_device: Instantiated<br>
> device tmp75 at 0x49<br>
> [ 23.728520] lm75 6-004c: hwmon2: sensor 'tmp75'<br>
> [ 23.733779] i2c i2c-6: new_device: Instantiated<br>
> device tmp75 at 0x4c<br>
> [ 23.743707] lm75 6-004d: hwmon3: sensor 'tmp75'<br>
> [ 23.749042] i2c i2c-6: new_device: Instantiated device<br>
> tmp75 at 0x4d<br>
> <br>
> # busctl introspect xyz.openbmc_project.HwmonTempSensor<br>
> /xyz/openbmc_project/sensors/temperature/DIMM_P1_EFGH<br>
> xyz.openbmc_project.Sensor.Value <br>
> interface - - -<br>
> .MaxValue <br>
> property d 127 emits-<br>
> change<br>
> .MinValue <br>
> property d -128 emits-<br>
> change<br>
> .Unit <br>
> property s "xyz.openbmc_project.Sensor.Value.Uni... emits-<br>
> change<br>
> .Value <br>
> property d 40.187 emits-<br>
> change writable<br>
> <br>
> # cat /sys/bus/i2c/devices/6-<br>
> 004d/hwmon/hwmon3/temp1_input<br>
> 40187<br>
> =======================================<br>
> 1. From my understanding, there is "detection daemon" which scans<br>
> I2C bus looking for EEPROMs with IPMI FRU data. However, I found all<br>
> devices on the I2C buses would be listed, not only Fru devices, when<br>
> I used the command below. Is this correct?<br>
> # busctl tree xyz.openbmc_project.FruDevice<br>
> `-/xyz<br>
> `-/xyz/openbmc_project<br>
> `-/xyz/openbmc_project/FruDevice<br>
> |-/xyz/openbmc_project/FruDevice/0_80<br>
> |-/xyz/openbmc_project/FruDevice/0_88<br>
> |-/xyz/openbmc_project/FruDevice/2_108<br>
> |-/xyz/openbmc_project/FruDevice/2_112<br>
> |-/xyz/openbmc_project/FruDevice/2_68<br>
> |-/xyz/openbmc_project/FruDevice/2_72<br>
> |-/xyz/openbmc_project/FruDevice/3_22<br>
> |-/xyz/openbmc_project/FruDevice/3_50<br>
> |-/xyz/openbmc_project/FruDevice/4_56<br>
> |-/xyz/openbmc_project/FruDevice/5_48<br>
> |-/xyz/openbmc_project/FruDevice/5_81<br>
> |-/xyz/openbmc_project/FruDevice/6_73<br>
> |-/xyz/openbmc_project/FruDevice/6_76<br>
> |-/xyz/openbmc_project/FruDevice/6_77<br>
> |-/xyz/openbmc_project/FruDevice/7_80<br>
> |-/xyz/openbmc_project/FruDevice/7_88<br>
> |-/xyz/openbmc_project/FruDevice/8_101<br>
> `-/xyz/openbmc_project/FruDevice/hudsonbay ©¬<br>
> this is the probe name we define in JSON configuration<br>
> <br>
> Thanks.<br>
> <br>
> Regards,<br>
> Chris Chen<br>
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-- <br>
Best regards,<br>
Andrei Kartashev<br>
<br>
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