Here is a patch series that fixes a single bug and adds fwnode support to the lm3630a driver. This work was tested on a LG Nexus 5 (hammerhead) phone. My status page at https://masneyb.github.io/nexus-5-upstream/ describes what is working so far with the upstream kernel.
See the individual patches for the changelog.
Brian Masney (3): backlight: lm3630a: return 0 on success in update_status functions dt-bindings: backlight: add lm3630a bindings backlight: lm3630a: add firmware node support
.../leds/backlight/lm3630a-backlight.yaml | 124 ++++++++++++++++ drivers/video/backlight/lm3630a_bl.c | 132 +++++++++++++++++- 2 files changed, 252 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml