Messages in this thread | | | Date | Mon, 15 Feb 2016 23:04:26 +0100 | Subject | Re: [PATCH] pinctrl: sunxi: set pin function as input on export | From | Linus Walleij <> |
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On Mon, Feb 8, 2016 at 3:37 PM, Krzysztof Adamski <krzysztof.adamski@tieto.com> wrote:
> Default function of a pin in sunxi SoCs is "disabled". By default gpios > exported by sysfs are set as input and indeed, when reading "direction" > file you will get "in". The "value" pin won't return proper value, > though, confusing user of this interface. > > This patch sets direction of a GPIO as input when exporting it. > > Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com>
As maxime says it's not a sunxi problem.
So maybe it is wrong to set pins to either input or output when exporting them, I suspect they should be exported as is.
Also: the sysfs ABI is deprecated. I suggest you invest your time in working on the new chardev ABI.
Yours, Linus Walleij
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