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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am currently trying to add a simple temp sensor to my image, which is based off of the evb-ast2600 image. I have successfully been able to add this sensor to a ast2500-based image, but the 2600 is not cooperating. Any pointers would
be greatly appreciated (and sanity-saving), as I am near the end of all paths I know of.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Project bblayers.conf.sample contains the following:<o:p></o:p></p>
<p class="MsoNormal">==========<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-poky \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-openembedded/meta-oe \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-openembedded/meta-networking \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-openembedded/meta-python \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-phosphor \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-aspeed \<o:p></o:p></p>
<p class="MsoNormal"> ##OEROOT##/meta-ourproject \<o:p></o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The device tree has this (and using the standard aspeed_g6_dtsi):<o:p></o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal">&i2c1 {<o:p></o:p></p>
<p class="MsoNormal"> status = "okay";<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> tmp423@4c {<o:p></o:p></p>
<p class="MsoNormal"> compatible = "ti,tmp423";<o:p></o:p></p>
<p class="MsoNormal"> reg = <0x4c>;<o:p></o:p></p>
<p class="MsoNormal"> };<o:p></o:p></p>
<p class="MsoNormal">};<o:p></o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Recipes-phosphor/sensors contains the directory structure phosphor-hwmon/obmc/hwmon/ahb/apb/bus@1e78a000/i2c-bus@100, with tmp423.conf in it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The phosphor-hwmon_%.bbappend file contains this:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal">FILESEXTRAPATHS_prepend_ourproject := "${THISDIR}/${PN}:"<o:p></o:p></p>
<p class="MsoNormal">EXTRA_OECONF_append_ourproject = " --enable-negative-errno-on-fail"<o:p></o:p></p>
<p class="MsoNormal">CHIPS = " \<o:p></o:p></p>
<p class="MsoNormal"> bus@1e78a000/i2c-bus@100/tmp423@4c \<o:p></o:p></p>
<p class="MsoNormal"> "<o:p></o:p></p>
<p class="MsoNormal">ITEMSFMT = "ahb/apb/{0}.conf"<o:p></o:p></p>
<p class="MsoNormal">ITEMS = "${@compose_list(d, 'ITEMSFMT', 'CHIPS')}"<o:p></o:p></p>
<p class="MsoNormal">ENVS = "obmc/hwmon/{0}"<o:p></o:p></p>
<p class="MsoNormal">SYSTEMD_ENVIRONMENT_FILE_${PN}_append_ourproject = " ${@compose_list(d, 'ENVS', 'ITEMS')}"<o:p></o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When booting up in Qemu, the device is recognized:<o:p></o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal">#cat /sys/firmware/devicetree/base/ahb/apb/bus@1e78a000/i2c-bus@100/tmp423@4c/compatible<o:p></o:p></p>
<p class="MsoNormal">ti,tmp423<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># cat /sys/devices/platform/ahb/ahb\:apb/ahb\:apb\:bus\@1e78a000/1e78a100.i2c-bus/i2c-1/1-004c/name<o:p></o:p></p>
<p class="MsoNormal">tmp423<o:p></o:p></p>
<p class="MsoNormal">===========<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There is even a link in /sys/bus/i2c/devices/1-004c to /sys/devices/platform/ahb/ahb\:apb/ahb\:apb\:bus\@1e78a000/1e78a100.i2c-bus/i2c-1/1-004c.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The .conf file shows up in /etc/default/obmc/hwmon/ahb/apb/bus@1e78a000/i2c-bus@100.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The problem is that nothing ever gets populated into /sys/class/hwmon. It is an empty directory. On our ast2400 and ast2500 images, this same procedure, stripped down to almost the exact same specs as I’ve mentioned above, produces a
link as /sys/class/hwmon/hwmon0. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What am I missing? <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">-Eric<o:p></o:p></p>
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