APPLIED: [SRU][K][PATCH 0/3] Support LEDs on the SiFive Unmatched

Dimitri John Ledkov dimitri.ledkov at canonical.com
Fri Aug 26 12:40:14 UTC 2022


On 24/08/2022 12:05, Emil Renner Berthing wrote:
> [Impact]
> 
>  * The Ubuntu RISC-V kernel carries out-of-tree patches to enable
>    the two LEDs on the SiFive Unmatched board.
> 
>  * There is now an upstream solution to enable the LEDs that appears
>    a little different from userspace. With the out-of-tree patches the
>    three colours in the RGB LED appears as 3 different LEDs, but upstream
>    models them as 1 RGB LED.
> 
>  * Replacing the out-of-tree patches with the upstream solution will
>    make Ubuntu kernels behave like the upstream kernel going forward.
> 
> [Test Plan]
> 
>  * Boot Ubuntu on the Unmatched board and look at how the LEDs show up
>    in /sys/class/leds
> 
>  * Check that both the green D12 and all three colours of D2 can still
>    be controlled from userspace.
> 
> [Where problems could occur]
> 
>  * Users may have scripts setting up LEDs that will no longer work when
>    updating to Kinetic with this change.
> 
> Emil Renner Berthing (3):
>   dt-bindings: leds: pwm-multicolor: Add active-low property
>   leds: pwm-multicolor: Support active-low LEDs
>   riscv: dts: sifive unmatched: Add PWM controlled LEDs
> 
>  .../bindings/leds/leds-pwm-multicolor.yaml    |  4 ++
>  .../boot/dts/sifive/hifive-unmatched-a00.dts  | 42 +++++++++++++++++++
>  drivers/leds/rgb/leds-pwm-multicolor.c        |  5 +++
>  3 files changed, 51 insertions(+)
> 

Applied to kinetic:linux master-next branch.
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