Dear Hans,
dear developers,
thank you for the quick reply. Actually, this was the first time I ever
looked into the U-Boot code and I was (and am) not aware of the DT
support status in U-Boot. So, please apologize that using
CONFIG_SYS_EXTRA_OPTIONS is probably not the best solution.
Maybe, the following information is helpful to anybody working on it:
I am using Debian 8.0 (Jessie) with the stock kernel and U-Boot. The
stock kernel includes a devicetree blob supporting the LEDs on the
Cubietruck perfectly.
# dpkg -l |grep u-boot
ii u-boot:armhf 2014.10+dfsg1-5 armhf
A boot loader for embedded systems
[...]
ii u-boot-sunxi:armhf 2014.10+dfsg1-5gk1 armhf
A boot loader for sunxi systems
ii u-boot-tools 2014.10+dfsg1-5 armhf
companion tools for Das U-Boot bootloader
# dpkg -l |grep linux-image
ii linux-image-3.16.0-4-armmp-lpae 3.16.7-ckt9-3~deb8u1 armhf
Linux 3.16 for ARMv7 multiplatform compatible SoCs supporting LPAE
ii linux-image-armmp-lpae 3.16+63 armhf
Linux for ARMv7 multiplatform compatible SoCs supporting LPAE
(meta-package)
# dpkg -L linux-image-3.16.0-4-armmp-lpae | grep truck
/usr/lib/linux-image-3.16.0-4-armmp-lpae/sun7i-a20-cubietruck.dtb
# ls -l /sys/devices/leds/leds/
total 0
drwxr-xr-x 3 root root 0 May 13 09:07 cubietruck:blue:usr/
drwxr-xr-x 3 root root 0 May 13 09:07 cubietruck:green:usr/
drwxr-xr-x 3 root root 0 May 13 10:01 cubietruck:orange:usr/
drwxr-xr-x 3 root root 0 May 13 09:06 cubietruck:white:usr/
Download link:
https://packages.debian.org/stable/kernel/linux-image-3.16.0-4-armmp-lpae
Regards,
Gundolf Kiefer
On Tue, 12 May 2015 17:15:26 +0200
Hans de Goede <hdego...@redhat.com> wrote:
> Hi,
>
> On 05/12/2015 03:39 PM, Prof. Dr. Gundolf Kiefer wrote:
> > Dear developers,
> >
> > the attached patch adds LED support for the Cubietruck board.
> >
> > I found that the support for the onboard leds is missing for
> > sunxi-based boards in the latest Debian unstable and perhaps
> > upstream version of U-Boot. IMHO LEDs are very helpful for headless
> > systems. Perhaps the patch can be helpful somehow.
> >
> > The code has basically been ported from the U-Boot version maintained at
> > linux-sunxi.org. As in the sunxi version, the blue led is switched on
> > by default.
> >
> > Kind regards,
> >
> > Gundolf Kiefer
>
> Thanks for the patch, but we really do not want to add new options to
> CONFIG_SYS_EXTRA_OPTIONS, at a minimum you need to add new Kconfig
> options for the leds, using gpio names for them, and sunxi_name_to_gpio
> in some place to translate to gpio numbers.
>
> But we really do not want that either for upstream u-boot master we've
> switched to using devicetree for all sunxi boards, and we really want
> to use devicetree for this, which already has the led info, rather then
> duplicating the led info in sunxi defconfig files.
>
> Simon, do we already have support for gpio-leds through devicetree
> in the device-model code somewhere?
>
> Regards,
>
> Hans
>
>
>
> >
> >
> > Begin forwarded message:
> >
> > Date: Tue, 05 May 2015 09:46:39 -0700
> > From: Vagrant Cascadian <vagr...@aikidev.net>
> > To: "Prof. Dr. Gundolf Kiefer" <gundolf.kie...@hs-augsburg.de>,
> > 783...@bugs.debian.org Subject: Re: Bug#783846: Patch to enable LEDs on
> > sunix/Cubietruck
> >
> >
> > On 2015-04-30, Prof. Dr. Gundolf Kiefer wrote:
> >> It seems that the support for the onboard leds is missing for
> >> sunxi-based boards even in the latest version (Debian unstable). IMHO
> >> LEDs are very helpful for headless systems.
> >
> > Thanks for the patches!
> >
> > If you could submit these patches to u-boot upstream, that would be
> > best; we're trying to minimize the patches that are not already included
> > upstream.
> >
> >
> > live well,
> > vagrant
> >
> >
> >
> > ---------------------------------------------------------------
> > Prof. Dr. Gundolf Kiefer
> > Effiziente Eingebettete Systeme - Efficient Embedded Systems
> > Fakultät für Informatik - Faculty of Computer Science
> > Hochschule Augsburg - University of Applied Sciences
> > http://www.hs-augsburg.de/~kiefer
> > ---------------------------------------------------------------
> >
---------------------------------------------------------------
Prof. Dr. Gundolf Kiefer
Effiziente Eingebettete Systeme - Efficient Embedded Systems
Fakultät für Informatik - Faculty of Computer Science
Hochschule Augsburg - University of Applied Sciences
http://www.hs-augsburg.de/~kiefer
---------------------------------------------------------------
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