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<p class="MsoNormal">Are you setting these GPIO in any other applications. Quickly if you are using libgpiod then these line might be already open.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">More importantly, are you able to export any other GPIO?<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">-Vijay<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">openbmc <openbmc-bounces+vijaykhemka=fb.com@lists.ozlabs.org> on behalf of
</span><span style="font-size:12.0pt;font-family:MingLiU;color:black">赵东</span><span style="font-size:12.0pt;font-family:"MS Gothic";color:black">浩</span><span style="font-size:12.0pt;color:black"> <z1908144712@163.com><br>
<b>Date: </b>Wednesday, January 1, 2020 at 4:39 PM<br>
<b>To: </b>"openbmc@lists.ozlabs.org" <openbmc@lists.ozlabs.org><br>
<b>Subject: </b>Failed to export GPIO from sysfs<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif">I want to control GPIO F1, F2 and F3, but I can't export from sysfs. When I execute
<span style="color:black;background:#D6D6D6">echo 333 > export</span>, the following error is reported:<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">root@xxxx:/sys/class/gpio# echo 333 > export </span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">[ 120.060018] aspeed-g4-pinctrl 1e6e2000.syscon:pinctrl: request() failed for pin 41</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">[ 120.067642] aspeed-g4-pinctrl 1e6e2000.syscon:pinctrl: pin-41 (1e780000.gpio:333) status -1</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">-sh: echo: write error: Operation not permitted</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">root@xxxx:/sys/class/gpio# echo 334 > export </span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">[ 136.689801] aspeed-g4-pinctrl 1e6e2000.syscon:pinctrl: request() failed for pin 42</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">[ 136.697423] aspeed-g4-pinctrl 1e6e2000.syscon:pinctrl: pin-42 (1e780000.gpio:334) status -1</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">-sh: echo: write error: Operation not permitted</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">root@xxxx:/sys/class/gpio# echo 335 > export </span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">[ 140.289975] aspeed-g4-pinctrl 1e6e2000.syscon:pinctrl: request() failed for pin 43</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">[ 140.297601] aspeed-g4-pinctrl 1e6e2000.syscon:pinctrl: pin-43 (1e780000.gpio:335) status -1</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#D6D6D6"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif;color:black">-sh: echo: write error: Operation not permitted</span><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Microsoft YaHei",sans-serif">Since these gpios are used to control remote switch machines, no other devices occupy these gpios. I wonder if there are any places where gpios need to be set?<o:p></o:p></span></p>
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<p class="MsoNormal" style="word-break:break-all"><b><span style="font-size:12.0pt;color:#31353B">Hao<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="word-break:break-all"><span style="font-size:10.5pt;color:#9B9EA1">z1908144712@163.com<o:p></o:p></span></p>
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