Re: linux 4.2-rc1 broken Nokia N900

Pali Rohár
2015-07-13T20:34:27Z

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On Monday 13 July 2015 22:28:35 Michael Welling wrote:
> On Mon, Jul 13, 2015 at 07:09:06PM +0200, Pali Rohár wrote:
> > Hello, here is my objdump of 4.2-rc2 version:
> >
> > 00000064 <omap2_mcspi_set_cs>:
> > 64: e3003182 movw r3, #386 ; 0x182
> > 68: e19030b3 ldrh r3, [r0, r3]
> > 6c: e3130004 tst r3, #4
> > 70: 0a000001 beq 7c
> > <omap2_mcspi_set_cs+0x18> 74: e2711001 rsbs
> > r1, r1, #1
> > 78: 33a01000 movcc r1, #0
> > 7c: e5902188 ldr r2, [r0, #392] ; 0x188
> > 80: e3520000 cmp r2, #0
> > 84: 012fff1e bxeq lr
> > 88: e5923018 ldr r3, [r2, #24]
> > 8c: e3510000 cmp r1, #0
> > 90: 13c33601 bicne r3, r3, #1048576 ;
> > 0x100000 94: 03833601 orreq r3, r3, #1048576
> > ; 0x100000 98: e5823018 str r3, [r2,
> > #24]
> > 9c: e5902188 ldr r2, [r0, #392] ; 0x188
> > a0: e5922000 ldr r2, [r2]
> > a4: e582302c str r3, [r2, #44] ; 0x2c
> > a8: e592302c ldr r3, [r2, #44] ; 0x2c
> > ac: e12fff1e bx lr
>
> I have not been able to duplicate the failure on the hardware that I
> have. I dug out my old Beagleboard and added an SPI registration to
> the dts. This was the closest hardware that I had to the N900's
> processor.
>
> What is the version of the gcc compiler you are using and where did
> you get it from?
>

I'm using gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) from package
gcc-4.6-arm-linux-gnueabi which is available on Ubuntu 12.04 LTS
(version 4.6.3-1ubuntu5cross1.62).

> For instance, I am using a 4.9.1 compiler that I built using Yocto.
>
> Also are you using devicetree or the old board file board-rx51.c?

I'm using devicetree.

--
Pali Rohár
pali.rohar@gmail.com

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