Re: Getting gpios from user space based on gpio-line-names

[Michal Simek <monstr@monstr.eu>]

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On 3.7.2017 15:06, Bartosz Golaszewski wrote:
> 2017-07-03 15:01 GMT+02:00 Michal Simek <monstr@monstr.eu>:
>> Hi,
>>
>> I am trying to find some docs about how to ask for gpio line
>> based on gpio-line-names in DT. I see line names available via debugfs
>> which is not suitable for production.
>> And also I didn't find a way how to ask for gpio Linux number from user
>> space to start to work with them.
>> This is for gpio mraa integration which depends on Linux gpio line numbers.
>>
>> Thanks,
>> Michal
>>
>> --
>> Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
>> w: www.monstr.eu p: +42-0-721842854
>> Maintainer of Linux kernel - Xilinx Microblaze
>> Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
>> U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP SoCs
>>
>>
> 
> Hi Michal,
> 
> you can try libgpiod[1] and specifically the gpiofind tool included in
> the repository. Buildroot has this package should you need to build a
> rootfs for some specific target.
> 
> Best regards,
> Bartosz Golaszewski
> 
> [1] https://github.com/brgl/libgpiod
> 

Thanks. That's what I was looking for. I knew that there is new
interface but didn't have this link.

Thanks,
Michal


-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP SoCs



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