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<p class="MsoNormal" style="margin-bottom:12.0pt">Classification: <b><span style="color:green">Public</span></b><span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal">Hi Team,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Recently, I have tested sensors for tiogapass, in which one sensor returns negative value.<o:p></o:p></p>
<p class="MsoNormal">After analysing the code in the dbus-sensors repo, I found the following issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a href="https://github.com/openbmc/dbus-sensors/blob/master/src/IpmbSensor.cpp#L267">dbus-sensors/IpmbSensor.cpp at master · openbmc/dbus-sensors (github.com)</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">From the above link, We need only below line in the code to process the HSC sensors value for tiogapass.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">int16_t value = ((data[4] << 8) | data[3]);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Since the below logic is added, the values get shifted and getting negative values as output.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">constexpr const size_t shift = 16 - 11; // 11bit into 16bit<o:p></o:p></p>
<p class="MsoNormal">value <<= shift;<o:p></o:p></p>
<p class="MsoNormal">value >>= shift;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Could you please suggest any idea to resolve this issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Jayashree<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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