Re: [PATCH 2/2] leds: lp8864: Register a backlight device
Daniel Thompson <[email protected]>
| Newsgroups | org.kernel.vger.linux-fbdev,org.freedesktop.lists.dri-devel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-leds |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Aug 17, 2026 at 07:08:15PM +0200, A. Sverdlin wrote: > From: Alexander Sverdlin <[email protected]> > > The LP8864/LP8866 is a display-cluster LED backlight driver. Expose a > standard backlight class interface in addition to the LED class device, > so it can be used by display/panel stacks that expect a backlight. > > Use the new devm_led_backlight_register() helper, which spawns a > led-backlight device driven by our LED and tied to the I2C device > lifetime. This keeps the driver a plain LED driver, requires no > device-tree changes and remains backwards compatible with existing DTs. > It is a no-op when the led-backlight support is not enabled. ... but when led-backlight support is enabled it will prohibit the use of the LED sysfs interface. Having zero DT changes is a nice property but it seems rather fragile to change the ABI the userspace must use to manipulate the LED based on CONFIG_LED_BL. Is there no way to explictly configure which ABI should be used? Daniel.