#14309: gpio_free() / pinctrl doesnt work for ralink trunk
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Reporter: info@… | Owner: blogic
Type: defect | Status: assigned
Priority: normal | Milestone: Chaos Calmer (trunk)
Component: kernel | Version: Trunk
Resolution: | Keywords:
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Comment (by schildt):
The attached pin offers the "glue code", fixing the unexport/release of a
pin
It is still against the old 3.10 OpenWRT kernel for ramips, but I guess
it should work with the newer kernel too.
Actually to test, no kernel module is needed. In trunk the sequence
{{{
echo 17 > /sys/class/gpio/export
echo 17 > /sys/class/gpio/unexport
echo 17 > /sys/class/gpio/export
}}}
fails at the second export as described in this ticket. With this patch it
works.
--
Ticket URL: <https://dev.openwrt.org/ticket/14309#comment:4>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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