lkml.org 
[lkml]   [2021]   [Jun]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH V3 1/3] gpio: Add virtio-gpio driver
    From
    Date
    On 10.06.21 15:22, Arnd Bergmann wrote:

    > Can you give an example of how this would be hooked up to other drivers
    > using those gpios. Can you give an example of how using the "gpio-keys" or
    > "gpio-leds" drivers in combination with virtio-gpio looks like in the DT?

    Connecting between self-probing bus'es and DT is generally tricky. IMHO
    we don't have any generic mechanism for that.

    I've made a few attempts, but nothing practically useful, which would be
    accepted by the corresponding maintainers, yet. We'd either need some
    very special logic in DT probing or pseudo-bus'es for the mapping.
    (DT wants to do those connections via phandle's, which in turn need the
    referenced nodes to be present in the DT).

    > From what I can tell, both the mmio and pci variants of virtio can have their
    > dev->of_node populated, but I don't see the logic in register_virtio_device()
    > that looks up the of_node of the virtio_device that the of_gpio code then
    > tries to refer to.

    Have you ever successfully bound a virtio device via DT ?


    --mtx

    --
    ---
    Hinweis: unverschlüsselte E-Mails können leicht abgehört und manipuliert
    werden ! Für eine vertrauliche Kommunikation senden Sie bitte ihren
    GPG/PGP-Schlüssel zu.
    ---
    Enrico Weigelt, metux IT consult
    Free software and Linux embedded engineering
    info@metux.net -- +49-151-27565287

    \
     
     \ /
      Last update: 2021-06-10 18:01    [W:4.177 / U:0.108 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site