[Gta04-owner] Now that 3.2-final is out...

[NeilBrown]

On Tue, 17 Jan 2012 18:30:19 +1100 NeilBrown <neilb at suse.de> wrote:

> It should be possible to achieve the same thing by defining
> CONFIG_EARLY_PRINTK and CONFIG_DEBUG_LL and including 'earlyprintk' in the
> command-line options.
> I've tried that and it didn't seem to meet the need I had at the time.  I
> don't recall the details.
> 
> > 
> > I have used this to debug NULL pointer dereferences in the backport
> > of the omap-serial.c driver to 2.6.32.
> > 
> 
> The fact that it worked for you gives me hope - I'll try again.

Isn't it amazing what a little hope can do!!

This patch:

diff --git a/arch/arm/plat-omap/include/plat/uncompress.h b/arch/arm/plat-omap/include/plat/uncompress.h
index 2f472e9..de9bea7 100644
--- a/arch/arm/plat-omap/include/plat/uncompress.h
+++ b/arch/arm/plat-omap/include/plat/uncompress.h
@@ -164,6 +164,7 @@ static inline void __arch_decomp_setup(unsigned long arch_id)
 		DEBUG_LL_OMAP3(3, omap3517evm);
 		DEBUG_LL_OMAP3(3, omap3_beagle);
 		DEBUG_LL_OMAP3(3, omap3_pandora);
+		DEBUG_LL_OMAP3(3, gta04);
 		DEBUG_LL_OMAP3(3, omap_ldp);
 		DEBUG_LL_OMAP3(3, overo);
 		DEBUG_LL_OMAP3(3, touchbook);

on top of my current kernel will cause 'earlyprintk' to start working.

Now I can see where it freezes.
Immediately after:

[    6.420043] PM: Adding info for i2c:1-004b
[    6.429138] bus: 'i2c': driver_probe_device: matched device 1-004b with driver dummy
[    6.445465] bus: 'i2c': really_probe: probing driver dummy with device 1-004b
[    6.460540] driver: '1-004b': driver_bound: bound to device 'dummy'
[    6.473815] bus: 'i2c': really_probe: bound device 1-004b to driver dummy


which means immediately before:

[    6.513458] twl4030: PIH (irq 7) chaining IRQs 368..375
[    6.525207] twl4030: power (irq 373) chaining IRQs 376..383
[    6.537994] Registering platform device 'twl4030_gpio'. Parent at 1-0049
[    6.552215] device: 'twl4030_gpio': device_add
[    6.561767] bus: 'platform': add device twl4030_gpio
[    6.572601] PM: Adding info for platform:twl4030_gpio

which makes it look a *lot* like interrupts from the twl4080 PMIC not being
handled correctly.

I'll do some more digging in a little while.

NeilBrown
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