marvell_cesa fails to register on kirkwood (88F6282)

[boris.brezillon@free-electrons.com (Boris Brezillon)]

Jan, Andrew

On Fri, 5 Feb 2016 10:02:46 +0100
Andrew Lunn <andrew@lunn.ch> wrote:

> On Fri, Feb 05, 2016 at 06:01:18AM +0100, JM wrote:
> > Hi,
> > 
> > I am testing marvell_cesa on a kirkwood device (QNAP TS-212p, Marvell
> > Kirkwood 88F6282, dts: http://pastebin.com/Gk95KFHf ).
> > As of kernel 4.4 (4.4.0-trunk-kirkwood #1 Debian 4.4-1~exp1) it fails
> > in the following way:
> > 
> > modprobe marvell_cesa allhwsupport=1
> > dmesg | tail -n 1
> > [ 1057.855091] marvell-cesa: probe of f1030000.crypto failed with error -12
> > 
> > or:
> > 
> > modprobe marvell_cesa
> > dmesg | tail -n 1
> > [ 9178.399357] marvell-cesa: probe of f1030000.crypto failed with error -524
> > 
> > With kernel 4.3 it would fail with error -22 on that hardware. There
> > are scattered reports from other users experiencing the same issue
> > (1,2,3)
> > 
> > I wonder if this is a result of an invalid definition of the
> > crypto-sram in the dts of this SoC, or perhaps some other problem
> > (PEBKAC included).
> 
> Hi Jan
> 
> Do you have SRAM enabled in your kernel configuration. The
> mvebu_v5_defconfig does not have it, which is a bug really.

Hm, the CRYPTO_DEV_MARVELL_CESA option selects the SRAM one [1].
Anyway, I also think this error is related to the SRAM (not sure why the
driver is not able to get the SRAM though).

Best Regards,

Boris

[1]http://lxr.free-electrons.com/source/drivers/crypto/Kconfig#L168


-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com