Re: Fw: [3.18.3] poll() on gpio pins broken

[Alexandre Courbot <gnurou@xxxxxxxxx>]

On Fri, Feb 20, 2015 at 1:52 AM, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
> On Thu, Feb 19, 2015 at 9:53 AM, folkert <folkert@xxxxxxxxxxxxxx> wrote:
>
>> I also think that this interface is cumbersome. I did not measure it(!)
>> but I think adding this open/seek + read construction may add all kinds
>> of overhead. Especially since my use-case requires the lowest latency
>> possible. Not to forget that conversion of the measured value to ascii
>> and back.
>
> Yes this interface sucks.
>
> The tentative long-term plan is to replace it with something like
> a char device that can handle a quick context switch and also
> issuing calls to set multiple pins at once, as we now have an
> in-kernel interface for that (that I totally refuse to support from
> sysfs).

Mmm, I was thinking it would be nice to have a (new, redesigned) sysfs
interface for this. :P

Aren't we going to make things less accessible if we use a char device?
--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html