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    SubjectRe: [PATCH v2] gpiolib: allow poll(2) on gpio value
    On Thursday 02 July 2009, Jani Nikula wrote:
    > I'm trying to say that if you call gpio_export() to create a sysfs
    > node, a subsequent poll() in user space won't work because there is no
    > irq set up, and sysfs_notify_dirent() won't be called. The patch
    > doesn't provide an interface for setting that up from kernel after
    > gpio_export() call - it's only possible to set up edge triggering and
    > sysfs notify by writing to the "edge" node from user space.

    OK, now I understand. :)

    Yeah, that seems fixable in followups.

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      Last update: 2009-07-03 00:19    [W:0.027 / U:5.452 seconds]
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