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SubjectRe: Nokia N900: omap aes is broken
Date
On Wednesday 25 February 2015 10:50:00 Pavel Machek wrote:
> On Tue 2015-02-24 09:37:34, Tony Lindgren wrote:
> > * Pali Rohár <pali.rohar@gmail.com> [150224 09:42]:
> > > On Tuesday 24 February 2015 18:25:12 Tony Lindgren wrote:
> > > > * Pali Rohár <pali.rohar@gmail.com> [150218 16:03]:
> > > > > --- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
> > > > > +++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
> > > > > @@ -3938,8 +3938,9 @@ int __init
> > > > > omap3xxx_hwmod_init(void)
> > > > >
> > > > > if (r < 0)
> > > > >
> > > > > return r;
> > > > >
> > > > > - /* Register GP-only hwmod links. */
> > > > > - if (h_gp && omap_type() == OMAP2_DEVICE_TYPE_GP) {
> > > > > +// /* Register GP-only hwmod links. */
> > > > > +// if (h_gp && omap_type() == OMAP2_DEVICE_TYPE_GP) {
> > > > > + if (h_gp) {
> > > > >
> > > > > r = omap_hwmod_register_links(h_gp);
> > > > > if (r < 0)
> > > > >
> > > > > return r;
> > > > >
> > > > > aes hwmod is defined in GP-only hwmod...
> > > >
> > > > Doesn't this depend on the bootloader version of n900 to
> > > > work?
> > > >
> > > > Regards,
> > > >
> > > > Tony
> > >
> > > Ok, it looks like second patch (omap_hwmod_3xxx_data.c)
> > > needs that aes-enabled bootloader.
> >
> > OK we need some runtime detection somehow for what's
> > enabled..
> >
> > > But first patch (omap3.dtsi) is needed for proper
> > > definitions. Otherwise omap-aes driver will never work on
> > > DT systems.
> >
> > Yeah that one makes sense to me, I guess you'll do a proper
> > fix for that one.
>
> If this depends on bootloader... would command line parameter
> be right solution here?
> Pavel

Problem is that we need to disable AES in:

* DT file
* hwmod source code
* ... and maybe on other places too ...

So I think it make sense to check if AES is disabled in DT and
add this check to other parts of kernel source code where needed.

--
Pali Rohár
pali.rohar@gmail.com
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