Re: [PATCH 0/2] LED: Add basic LP5860 LED matrix driver

[Steffen Trumtrar <s.trumtrar@pengutronix.de>]

Hi,

On 2025-02-20 at 13:57 +01, Steffen Trumtrar <s.trumtrar@pengutronix.de> wrote:

> The lp5860 is a LED matrix driver with 18 constant current sinks and 11
> scan switches which allows controlling up to 198 LED dots.
>
> This series adds just the basic support for the device on the SPI bus.
> It is also possible to use it on I2C. The interface can be
> switched/selected via an interface select pin.
>
> Next step for this driver will be adding open and short detection of the
> LEDs.

for this next step I wonder what would be the best way to propagate the failure states of the LED to the userspace? As far as I can tell, there are already TI LED drivers (lp55xx) that check open and short failures. These drivers only emit failures via sysfs_emit.
I need to be able to tell from userspace if an LED that is supposed to show some state info isn't broken in hardware.

Any ideas welcome,

Thanks,
Steffen

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