#21892: Oxnas pincontrol (GPIO) does not work
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Reporter: anonymous | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: kernel | Version: Trunk
Resolution: | Keywords: oxnas ox820 gpio pincontrol
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Comment (by dangole):
It doesn't matter where they are being set, in the stock-U-Boot or stock-
Firmware -- the idea is to dump the content of the GPIO registers in
working-state and compare it to the non-working state after cold-boot.
The registers are partially setup by the stock U-Boot to make things like
Ethernet work, other board-specific setup is done by Linux -- in a hacky
way included in drivers or board setup of the vendor/SDK-kernel used for
the stock firmware. When using more recent kernel of OpenWrt, the pinctrl
driver modifies the GPIO registers according to what it finds in the
device tree. It also got a debugfs interface in `/sys/kernel/debug/`, so
you can see what was supposedly set.
--
Ticket URL: <https://dev.openwrt.org/ticket/21892#comment:7>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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