On Mon, Oct 24, 2011 at 11:20 AM, Mike Frysinger <vapier....@gmail.com> wrote:
> but the question here is about pinctrl. does userspace really need to > manipulate the pinmapping ? if we agree on that, then the question is > on the userspace interface. > > assuming we want this, i can't see the performance argument being made > here for pinctrl. which means doing a sysfs interface here like we > already have with GPIO makes the most sense. GPIO deals in "binary" > data for the most part (reading/writing 0/1 ints) so the string-based > sysfs parsing is a bit weird, but pinctrl deals with strings > everywhere for selecting mapping groups, so sysfs is the natural > answer. Hm now I feel I start to agree with you and come back to my original proposition to do pinctrl in sysfs after all. I wonder how soon we have a practical use case for this. We do have this hacked-up driver in ux500: http://git.linaro.org/gitweb?p=bsp/st-ericsson/linux-3.0-ux500.git;a=tree;f=drivers/staging/ab5500_sim;hb=HEAD This controls a lot of SIM card pins from userspace... Yours, Linus Walleij _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
