Hi! > > > Thank you, Pavel, for the confirmation. > > > Thank you, Geert, for the review and the question. > > > > > > I would like to make it clearer. > > > > > > On Mon, 28 Apr 2025 Geert Uytterhoeven wrote: > > > > > > > > > > > > - Move driver to drivers/auxdisplay/ instead of drivers/leds/. > > > > > > > - Rename files from leds-lp5812.c/.h to lp5812.c/.h. > > > > > > > - Move ti,lp5812.yaml binding to auxdisplay/ directory, > > > > > > > and update the title and $id to match new path. > > > > > > > - No functional changes to the binding itself (keep Reviewed-by). > > > > > > > - Update commit messages and patch titles to reflect the move. > > > > > > > - Link to v7: https://lore.kernel.org/linux-leds/20250422190121.46839-1-trannamatk@xxxxxxxxx/ > > > > > > > > > > > > Out of sudden without discussing with auxdisplay maintainers/reviewers? > > > > > > Thanks, no. > > > > > > Please, put into the cover letter the meaningful summary of what's > > > > > > going on and why this becomes an auxdisplay issue. Brief review of the > > > > > > bindings sounds more likely like LEDS or PWM subsystems. > > > > > > > > > > It is 4x3 matrix. That means it is not suitable for LEDs. I don't > > > > > believe it is suitable for PWM, either -- yes, it is 36 PWM outputs, > > > > > but... > > > > > > > > Is it intended to be used as a 4x3 matrix, or is this just an internal > > > > wiring detail, and should it be exposed as 12 individual LEDs instead? > > > > > > The 4×3 matrix is a real and fundamental aspect of the LP5812’s operation. > > > It is not just an internal wiring detail. > > > The device adopts a Time-Cross-Multiplexing (TCM) structure, where 4 output > > > pins control 12 LED dots individually through scanning. Each pin includes > > > both high-side and low-side drive circuits, meaning matrix multiplexing is > > > required for proper operation — it cannot be treated as 12 completely > > > independent LEDs. > > > > Scanning is really a detail. > > > > If this is used as rectangular 4x3 display, then it goes to auxdisplay. > > > > If this is used as a power LED, SD activity LED, capslock and numlock > > ... placed randomly all around the device, then it goes LED subsystem. > > The LP5812 is used for LED status indication in devices like smart speakers, > wearables, and routers, not as a structured rectangular display. Show us one device where it is used, photo would be best. I suspect that the router use might indeed qualify for LED subsystem. You described is at 4x3 display, but it is really used as 4xRGB? > Given that, it seems to match the LED subsystem better than auxdisplay, doesn't it? Seems so, yes. From description, I assumed it was 4x3xRGB, not 4xRGB. Best regards, Pavel -- I don't work for Nazis and criminals, and neither should you. Boycott Putin, Trump, and Musk!
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