linux-kernel - Re: hwrng: pasemi_rng.c: Migrate to managed API

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Date:   Wed, 31 Aug 2016 15:02:53 +0100 (BST)
From:   Darren Stevens <darren@...vens-zone.net>
To:     PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
CC:     Herbert Xu <herbert@...dor.apana.org.au>,
        linux-kernel@...r.kernel.org,
        LABBE Corentin <clabbe.montjoie@...il.com>,
        linux-crypto@...r.kernel.org, mpm@...enic.com, olof@...om.net,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: hwrng: pasemi_rng.c: Migrate to managed API

Hello PrasannaKumar

On 30/08/2016, PrasannaKumar Muralidharan wrote:
> Hi Darren,
>> On mine (Amigaone X1000) that is correct, we boot linux with a vmlinux
>> file, and the bootloader (CFE) passes a fixed dtb. I think it is
>> possible to dump the tree from inside CFE, if it would help I can
>> invetigate?
>
> I don't know if it is possible to get dts from dtb even if you manage
> to extract devicetree blob from your system.

I didn't explain well, There is a CFE command 'show devtree' here's the
relevant bits (I Hope)

[CFE ]CFE> show devtree
[/]
 | #interrupt-cells                 val   0x00000002
 | #address-cells                   val   0x00000002
 | #size-cells                      val   0x00000002

...[snip]...

   [sdc@...00000]
    | name                          str   'sdc' 
    | device_type                   str   'sdc' 
    | #address-cells                val   0x00000001
    | #size-cells                   val   0x00000001
    | compatible                    str   '1682m-sdc' 'pasemi,pwrficient-sdc'
'pasemi,sdc' 
    | reg                           cell  00000000 FC000000 00000000 00800000 

...[snip]...

      [rng@...05000]
       | name                       str   'rng' 
       | device_type                str   'rng' 
       | compatible                 str   '1682m-rng' 'pasemi,pwrficient-rng'
'pasemi,rng' 
       | reg                        cell  FC105000 00001000 


Regards