From mboxrd@z Thu Jan 1 00:00:00 1970 From: tom.leiming@gmail.com (Ming Lei) Date: Mon, 4 Apr 2011 22:23:18 +0800 Subject: arm: pmu: support pmu/perf on OMAP4 - booting problem on pandaboard In-Reply-To: <4D99D251.6000901@linux.vnet.ibm.com> References: <4D95E244.1050400@linux.vnet.ibm.com> <4D99D251.6000901@linux.vnet.ibm.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, 2011/4/4 Avik Sil : > Hi Ming, > > On Saturday 02 April 2011 10:57 AM, Ming Lei wrote: >> >> Hi Avik, >> >> 2011/4/1 Avik Sil: >>> >>> 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? It should be inserted before calling omap4_configure_pmu_irq. thanks, -- Ming Lei