From: Avik Sil <aviksil@linux.vnet.ibm.com>
To: Ming Lei <tom.leiming@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org
Subject: Re: arm: pmu: support pmu/perf on OMAP4 - booting problem on pandaboard
Date: Mon, 04 Apr 2011 19:44:41 +0530 [thread overview]
Message-ID: <4D99D251.6000901@linux.vnet.ibm.com> (raw)
In-Reply-To: <BANLkTi=nOR=yX=QgbyCoYUE1U7DPxUCCzw@mail.gmail.com>
Hi Ming,
On Saturday 02 April 2011 10:57 AM, Ming Lei wrote:
> Hi Avik,
>
> 2011/4/1 Avik Sil<aviksil@linux.vnet.ibm.com>:
>> Hi,
>>
>> I've applied the patches in
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2011-March/045283.html
>> on top of a linaro kernel which resulted in booting problem on Pandaboard.
>> It hangs inside the cti_unlock() while reading the LOCKSTATUS value, which
>> happens when omap_init_pmu() is called. Please help me debug the issue.
>
> Please check if l3 clocks are enabled to drive CTI, such as done in below:
>
> 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);
>
Can you please tell me where should I insert the above code to enable l3
clocks to drive CTI?
Regards,
Avik
> No such issue on mainline since this clocks are enabled automatically.
>
> thanks,
WARNING: multiple messages have this Message-ID (diff)
From: aviksil@linux.vnet.ibm.com (Avik Sil)
To: linux-arm-kernel@lists.infradead.org
Subject: arm: pmu: support pmu/perf on OMAP4 - booting problem on pandaboard
Date: Mon, 04 Apr 2011 19:44:41 +0530 [thread overview]
Message-ID: <4D99D251.6000901@linux.vnet.ibm.com> (raw)
In-Reply-To: <BANLkTi=nOR=yX=QgbyCoYUE1U7DPxUCCzw@mail.gmail.com>
Hi Ming,
On Saturday 02 April 2011 10:57 AM, Ming Lei wrote:
> Hi Avik,
>
> 2011/4/1 Avik Sil<aviksil@linux.vnet.ibm.com>:
>> Hi,
>>
>> I've applied the patches in
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2011-March/045283.html
>> on top of a linaro kernel which resulted in booting problem on Pandaboard.
>> It hangs inside the cti_unlock() while reading the LOCKSTATUS value, which
>> happens when omap_init_pmu() is called. Please help me debug the issue.
>
> Please check if l3 clocks are enabled to drive CTI, such as done in below:
>
> 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);
>
Can you please tell me where should I insert the above code to enable l3
clocks to drive CTI?
Regards,
Avik
> No such issue on mainline since this clocks are enabled automatically.
>
> thanks,
next prev parent reply other threads:[~2011-04-04 14:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-01 14:33 arm: pmu: support pmu/perf on OMAP4 - booting problem on pandaboard Avik Sil
2011-04-02 5:27 ` Ming Lei
2011-04-02 5:27 ` Ming Lei
2011-04-04 14:14 ` Avik Sil [this message]
2011-04-04 14:14 ` Avik Sil
2011-04-04 14:23 ` Ming Lei
2011-04-04 14:23 ` Ming Lei
2011-04-04 16:01 ` Avik Sil
2011-04-04 16:01 ` Avik Sil
2011-04-05 2:03 ` Ming Lei
2011-04-05 2:03 ` Ming Lei
2011-04-05 11:05 ` Avik Sil
2011-04-05 11:05 ` Avik Sil
2011-04-06 6:07 ` Ming Lei
2011-04-06 6:07 ` Ming Lei
2011-04-07 9:06 ` Avik Sil
2011-04-07 9:06 ` Avik Sil
2011-04-07 9:54 ` Ming Lei
2011-04-07 9:54 ` Ming Lei
2011-04-07 10:42 ` Avik Sil
2011-04-07 10:42 ` Avik Sil
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