Re: [RFC] HID: hid-lg4ff g27 leds using LED subsystem

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On Wed, 14 Mar 2012, simon@xxxxxxxxxxxxx wrote:

> > I'm posting this more as a 'Request for Comments' following on from
> > Michal's patch this morning.
> 
> One thing I note sure about is permissions, the LEDs register as
> --
> Mar 14 14:57:35 ubuntu kernel: [ 6462.204185] Registered led device:
> 0003:046D:C294.0009::RPM1
> Mar 14 14:57:35 ubuntu kernel: [ 6462.204251] Registered led device:
> 0003:046D:C294.0009::RPM2
> Mar 14 14:57:35 ubuntu kernel: [ 6462.204301] Registered led device:
> 0003:046D:C294.0009::RPM3
> Mar 14 14:57:35 ubuntu kernel: [ 6462.204354] Registered led device:
> 0003:046D:C294.0009::RPM4
> Mar 14 14:57:35 ubuntu kernel: [ 6462.204402] Registered led device:
> 0003:046D:C294.0009::RPM5
> --
> 
> But I have to be root to perform
> --
> root@ubuntu:/sys/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1/2-1:1.0/0003:046D:C294.0009/leds/0003:046D:C294.0009::RPM1#
> echo 1 > brightness
> --
> 
> Is it possible to register so that all/any user can control the LED status?

Looking at the code, I don't think that's possible. Adding Richard to CC, 
he definitely might have an opinion on this.

-- 
Jiri Kosina
SUSE Labs
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