[OpenWrt-Devel] [Patch][BCM63XX][V2][RFC] Select HW_RANDOM_BCM63XX only in the SoCs that support it.

José Vázquez ppvazquezfer at gmail.com
Mon Jun 30 07:30:32 EDT 2014

2014-06-29 22:45 GMT+02:00, Jonas Gorski <jogo at openwrt.org>:
> On Sun, Jun 29, 2014 at 10:37 PM, José Vázquez <ppvazquezfer at gmail.com>
> wrote:
>> 2014-06-28 19:54 GMT+02:00, Jonas Gorski <jogo at openwrt.org>:
>>> Ah, I guess your problem is that something in your openwrt config
>>> depends on kmod-random-core, which will cause HW_RANDOM to be selected
>>> (as m), which makes HW_RANDOM_BCM63XX visible. In that case you need
>>> to either add "# CONFIG_HW_RANDOM_BCM63XX is not set" to
>>> config/target/generic-3.10 or create a proper kernel module package
>>> for HW_RANDOM_BCM63XX.
>>> Jonas
>> Now understand: something selects CONFIG_HW_RANDON=m and
>> automatically, because depends on BCM63XX, CONFIG_HW_RANDOM_BCM63XX
>> needs an m too.
>> Sorry for the noise.
> Not quite.
> default config-3.10 has CONFIG_HW_RANDOM=y and CONFIG_HW_RANDOM_BCM63XX=y.
> You run make kernel_menuconfig and deselect CONFIG_HW_RANDOM. Because
> CONFIG_HW_RANDOM_BCM63XX is not defined anymore, and your modified
> config-3.10 now only contains "# CONFIG_HW_RANDOM is not set".
> Now something in the build system selects CONFIG_HW_RANDOM=m, and
> suddenly CONFIG_HW_RANDOM_BCM63XX is available again, but config-3.10
> does not contain CONFIG_HW_RANDOM_BCM63XX anymore, so the kernel
> config system needs to ask what you want as its value.
> If you leave CONFIG_HW_RANDOM=y and only disable
> CONFIG_HW_RANDOM_BCM63XX, then you will have no issue, because then
> your config-3.10 will contain a line "# CONFIG_HW_RANDOM_BCM63XX  is
> not set"
> Jonas
b43 and b43-legacy drivers enable CONFIG_HW_RANDOM in
.config.override; without they selected the "problem" does not happen.
More drivers need HW_RANDOM but they were not selected in my owrt

define KernelPackage/b43
  $(call KernelPackage/mac80211/Default)
  TITLE:=Broadcom 43xx wireless support

I have no idea why these drivers enable HW_RANDOM but surely there is
a good reason.

A lot of thanks for your time and guidance.

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