Linux kernel module for Waveshare 3.2inch RPi LCD (B) V3 touch controller

Peter, All,

On 2015-01-10 02:13 +0100, Peter Seiderer spake thusly:
[--SNIP--]

Quoted 1 line

Thanks, great work. My RaspberryPi B+ booted with the new linux-kernel/DT support.

Thanks for the report. Great! :-)

Quoted 4 lines

The only thing I had to change is the kernel compression standard (in the kernel config file) from CONFIG_KERNEL_XZ=y to CONFIG_KERNEL_GZIP=y because otherweise the script mkknlimg failed with:
"* Is this a valid kernel? In pass-through mode."

Weird, it is working for me...

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Maybe some uncompress tool is missing or is to old on my host?

My xz is:

    $ xz --version
    xz (XZ Utils) 5.1.0alpha
    liblzma 5.1.0alpha

Can you check that your xz supports the --single-stream option?

Quoted 4 lines

Is
it possible to run mkknlimg automatically (with buildroot host/usr/bin path) to avoid such errors (and avoid someone installing zImage without running mkknlimg)?

OK, so it seems you do not have xz on your host, and that you rely on the one built by Buildroot, right?

And no, it is not possible to do it in the current Buildroot infrastructure:

- there's no way a package can declare hook (whichever) for another package,

- we do not want to add anything platform-specific to the kernel.

Regards,
Yann E. MORIN.

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Quoted 3 lines

    $ xz --version
    xz (XZ Utils) 5.1.0alpha
    liblzma 5.1.0alpha

$  xz --version
xz (XZ Utils) 5.0.7
liblzma 5.0.7

$ unxz --single-stream
unxz: unrecognized option '--single-stream'
unxz: Try `unxz --help' for more information.

Seems xz package on openSUSE 13.2 is not up to date....

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it possible to run mkknlimg automatically (with buildroot host/usr/bin path) to avoid such errors (and avoid someone installing zImage without running mkknlimg)?

OK, so it seems you do not have xz on your host, and that you rely on the one built by Buildroot, right?

And no, it is not possible to do it in the current Buildroot infrastructure:

- there's no way a package can declare hook (whichever) for another package,

Quoted 2 lines

- we do not want to add anything platform-specific to the kernel.

But for other tools buildroot provides host support packages?

Would something like the following be feasible with buildroot (host-xz has to be done, totally untested):

package/rpi-firmware/rpi-firmware.mk +1 -1

@@ -12,7 +12,7 @@ RPI_FIRMWARE_INSTALL_TARGET = NO
 RPI_FIRMWARE_INSTALL_IMAGES = YES
 
 ifeq ($(BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTBS),y)
-RPI_FIRMWARE_DEPENDENCIES += host-rpi-firmware
+RPI_FIRMWARE_DEPENDENCIES += host-rpi-firmware host-xz linux
 # Override the version in this case.
 RPI_FIRMWARE_VERSION = e42ddc0b04353cc292ce5215eea81484d72c5d09
 define RPI_FIRMWARE_INSTALL_DTB