Re: Recent git kernels and OSK

[Dirk Behme <dirk.behme@googlemail.com>]

Dirk Behme wrote:
> Philip Balister wrote:
...
>> Has anyone successfully booted a recent git kernel on the OSK?
...
> Just checked it. Seems that recent git on OSK is really broken. Enabling 
> lowlevel debug last thing I get is kernel command line output [3]. On my 
> last working kernel next output would be clock stuff [2]

> Any ideas?

Seems to me that it hangs in arch/arm/mach-omap1/clock.c in 
omap1_clk_init in

...
/* USB_REQ_EN will be disabled later if necessary (usb_dc_ck) */
reg = omap_readw(SOFT_REQ_REG) & (1 << 4);
omap_writew(reg, SOFT_REQ_REG);
if (!cpu_is_omap15xx())
   	omap_writew(0, SOFT_REQ_REG2);
...

If I remove "omap_writew(reg, SOFT_REQ_REG);" in code above 
it goes on booting but then crashes later in clk_disable() 
(as the comment above implies ;) ):

...
Initializing OMAP McBSP system
<6>omap_dsp_init() done
USB: hmc 16, usb0 2 wires
<6>i2c_omap i2c_omap.1: bus 0 rev2.2 at 100 kHz
<2>kernel BUG at arch/arm/plat-omap/clock.c:138!
<1>Unable to handle kernel NULL pointer dereference at 
virtual address 00000000
...

If I'm correct here (not sure, can anybody reproduce this?) 
I really wonder why it may hang in (unchanged) write access 
to SOFT_REQ_REG?

Again, any ideas?

Cheers

Dirk