arm: pmu: support pmu/perf on OMAP4 - booting problem on pandaboard

[aviksil@linux.vnet.ibm.com (Avik Sil)]

Hi Ming,

On Thursday 07 April 2011 03:24 PM, Ming Lei wrote:
> Hi Avik,
>
> Please check if the option CONFIG_PM is enabled or not.
CONFIG_PM is enabled in my config:

$ grep CONFIG_PM .config
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_SLEEP=y
CONFIG_PM_RUNTIME=y
CONFIG_PM_OPS=y
CONFIG_PM_OPP=y
CONFIG_PMIC_DA903X=y
CONFIG_PMIC_ADP5520=y

As suggested in 
http://groups.google.com/group/pandaboard/browse_thread/thread/74abf5dafa2fd6e2/b1cc29b5060b4223?#b1cc29b5060b4223 
, do you think prcm_setup_regs() has to be called for OMAP4?

Regards,
Avik

>
> If not, please try to enable it to see you issue can be fixed.
>
>
> 2011/4/7 Avik Sil<aviksil@linux.vnet.ibm.com>:
>> Hi Ming,
>>
>> On Wednesday 06 April 2011 11:37 AM, Ming Lei wrote:
>>>
>>> Hi Avik,
>>>
>>> 2011/4/5 Avik Sil<aviksil@linux.vnet.ibm.com>:
>>>>
>>>> Even after using ioremapped addresses in omap_writel() I'm getting the
>>>> oops.
>>>> Can you please point me to the location in mainline, where these l3
>>>> clocks
>>>> are enabled?
>>>
>>> I guess you can find here:
>>>
>>>           l3_main_3_ick&&    l3_instr_ick:
>>> arch/arm/mach-omap2/clock44xx_data.c
>>>
>>> the clocks are set as ENABLE_ON_INIT.
>>
>> Those clocks are also set ENABLE_ON_INIT in the linaro kernel. But still
>> it's hanging at "val = __raw_readl(base + LOCKSTATUS);" in cti_unlock(),
>> even after explicitly enabling it using:
>>
>> omap_writel(1, CM_L3INSTR_L3_3_CLKCTRL);
>> omap_writel(1, CM_L3INSTR_L3_INSTR_CLKCTRL);
>> omap_writel(2, CM_EMU_CLKSTCTRL);
>> while ((omap_readl(CM_EMU_CLKSTCTRL)&  0x300) != 0x300);
>>
>> BTW, the oops were fixed by replacing omap_writel with __raw_writel.
>>
>> Regards,
>> Avik
>>
>>>
>>> thanks,
>>
>>
>
>
> thanks,