Subject: Re: [v10,3/3] leds/powernv: Add driver for PowerNV platform

From: Michael Ellerman <[email-masked]>
Date: Thu, 20 Aug 2015 18:38:12 +1000 (AEST)

On Wed, 2015-19-08 at 16:49:54 UTC, Vasant Hegde wrote:
> This patch implements LED driver for PowerNV platform using the existing
> generic LED class framework.
> 
> PowerNV platform has below type of LEDs:
>   - System attention
>       Indicates there is a problem with the system that needs attention.
>   - Identify
>       Helps the user locate/identify a particular FRU or resource in the
>       system.
>   - Fault
>       Indicates there is a problem with the FRU or resource at the
>       location with which the indicator is associated.
> 
> We register classdev structures for all individual LEDs detected on the
> system through LED specific device tree nodes. Device tree nodes specify
> what all kind of LEDs present on the same location code. It registers
> LED classdev structure for each of them.
> 
> All the system LEDs can be found in the same regular path /sys/class/leds/.
> We don't use LED colors. We use LED node and led-types property to form
> LED classdev. Our LEDs have names in this format.
> 
>         <location_code>:<attention|identify|fault>
> 
> Any positive brightness value would turn on the LED and a zero value would
> turn off the LED. The driver will return LED_FULL (255) for any turned on
> LED and LED_OFF (0) for any turned off LED.
> 
> The platform level implementation of LED get and set state has been
> achieved through OPAL calls. These calls are made available for the
> driver by exporting from architecture specific codes.
> 
> Signed-off-by: Vasant Hegde <[email-masked]>
> Signed-off-by: Anshuman Khandual <[email-masked]>
> Acked-by: Stewart Smith <[email-masked]>
> Tested-by: Stewart Smith <[email-masked]>
> Acked-by: Jacek Anaszewski <[email-masked]>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/84ad6e5cd3e8b365c893

cheers