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515fa3ee9d
There was a bit of an integration glitch with the LED backlight series. The LED related parts got merged into v5.6-rc1, but the actual backlight driver got left out. This caused an issue on at least droid4 where the LCD backlight can not yet be enabled automatically. And the LCD backlight can no longer be enabled manually either via sysfs. The integration glitch happened because some pending comments from me. There was some confusion on which device tree property we should use for the default brightness property. After discussing how to fix this on the mailing lists, we came to the conclusion that it's best to fix this issue properly by adding the missing driver. The other solutions would mean backpedaling and try to come up with some temporary solution that really does not solve the issue for users. The patch for led_bl.c has been around for quite a while and tested by many users and was assumed to be merged as part of the LED backlight series. For the brightness property to use, we ended up using the more common "default-brightness-level" rather than "default-brightness" used by some backlight drivers. -----BEGIN PGP SIGNATURE----- iQJFBAABCAAvFiEEkgNvrZJU/QSQYIcQG9Q+yVyrpXMFAl5OppQRHHRvbnlAYXRv bWlkZS5jb20ACgkQG9Q+yVyrpXOB4g//b1K/jF80B8sKBhcR+XsSleo7q3wYdm7c dwlK6fAQVDFylk4/ZrLUgnuqPqIGGMeeSZsCE9upS/esQNJfiGid576hF/82huoL yqIxWQYxClfXmHX71s6BrI1rL/xXTjioSynBKeBb52+eUgnyRISGkOhm7xJE0ili Qv9SIGpPymZC+vPLS7hbt9E2vhpsMFEBOmQxXoIDL5PSaaTr5HalkNHgdxxPNne8 fftwD/z7exCj/8Gzsbq37aVNEwb+SQyu7jB38+mQLew1Tb3mpr1pdbWtJfIgrEqH XS7hMCd8kesPAXvY8fO4FukFatGbCsHrl/TXbe50utcVTVtRg8OasTTOf651vk94 Fzi/HxeTm0TT6BmJcivSbveab4XeYxoNrSn8XZKsErp5qNqQ5aHHLYM4oV8nUNjF 2f32ZinaLxKXu/TD0I2mQs/SOUVRm+1/f0rLuGcjshn0HsDF4Gjo9YkI2P3EDO/i V/kk+Y1vCGM5opgr6P7ndYe3xky/PK6XmDGXtgW+dZWMI4TPrDwfb1lp5FlMWTdH /wOVKxqjbbW0JsVidN8pJEMOzwH8/qKtrA1rt/szZhbwvBBdO4MdE0G7yxH2vMbE mZmSIUIvRTzaownEHhr315fga3OvPC/P/b1GLUSN4Jg95s9W539mX3hwKT7FA66m uLG/mAWEmv0= =Pox9 -----END PGP SIGNATURE----- Merge tag 'omap-for-v5.6/droid4-lcd-fix-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes Fix LCD backlight issue for droid4 There was a bit of an integration glitch with the LED backlight series. The LED related parts got merged into v5.6-rc1, but the actual backlight driver got left out. This caused an issue on at least droid4 where the LCD backlight can not yet be enabled automatically. And the LCD backlight can no longer be enabled manually either via sysfs. The integration glitch happened because some pending comments from me. There was some confusion on which device tree property we should use for the default brightness property. After discussing how to fix this on the mailing lists, we came to the conclusion that it's best to fix this issue properly by adding the missing driver. The other solutions would mean backpedaling and try to come up with some temporary solution that really does not solve the issue for users. The patch for led_bl.c has been around for quite a while and tested by many users and was assumed to be merged as part of the LED backlight series. For the brightness property to use, we ended up using the more common "default-brightness-level" rather than "default-brightness" used by some backlight drivers. * tag 'omap-for-v5.6/droid4-lcd-fix-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: droid4: Configure LED backlight for lm3532 backlight: add led-backlight driver Link: https://lore.kernel.org/r/pull-1582303901-96693@atomide.com Signed-off-by: Olof Johansson <olof@lixom.net> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.