#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):
Thanks for reviewing mach-ox820.c, indeed it looks like SEC_CTRL_*_SEL are
supposed to be 0'd there. And yes, this explains why the RTC was working
at all when warm-booting from the stock firmware...
Better remove the LEDs section if they don't match anyway.
My first bet would be something like this
{{{
pinctrl {
i2c {
pinctrl_i2c: i2c-0 {
plxtech,pins =
<1 9 0 0 /* MF_B9 GPIO */
1 10 0 0 /* MF_B10 GPIO */
1 5 0 1>; /* e.g. MF_B5
pull-up */
};
};
};
}}}
Then make use of pinctrl_i2c by adding it to the i2c-gpio section
{{{
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c>;
}}}
To better understand the pinctrl driver, try understanding pinctrl-at91.c
which it is based pn. For corresponding device-tree examples, see
at91*.dts*.
The whole oxnas target definitely needs more cleanup and review (help is
always welcome), I didn't have a deeper look at pinctrl and irqchip yet
because I didn't need to... I will have to when working on getting rid of
mach-oxnas/include/asm/{iomap,hardware}.h which is somewhere down on my
agenda ...
--
Ticket URL: <https://dev.openwrt.org/ticket/21892#comment:19>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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