Hi Will and stephane, On Wed, Jan 18, 2012 at 12:18 PM, Ming Lei <ming.lei@xxxxxxxxxxxxx> wrote: > Hi stephane & Will, > > On Tue, Jan 10, 2012 at 8:46 AM, stephane eranian > <eranian@xxxxxxxxxxxxxx> wrote: >> See the dmesg from my 3.2 kernel: >> >> >> [ 0.000000] Booting Linux on physical CPU 0[ 0.000000] But if you test omap4 perf against -next kernel, pmu won't work because the commit[1] may put 'emu_sys_clkdm' clock domain into HW_AUTO mode, so writing pmu register may not take effect. I have found the similar problem on cam clock domain before[2]. CD_EMU is very simliar with CD_CAM in the point below: CD_EMU has no static or module wake-up dependency with any other clock domain of the device.[3] So the patch[4] can make omap4 pmu work on -next tree. Shilimkar, care to comment on the patch[4]? thanks, -- Ming Lei [1], commit 3c50729b3fa1cd8ca1f347e6caf1081204cf1a7c Author: Santosh Shilimkar <santosh.shilimkar@xxxxxx> Date: Wed Jan 5 22:03:17 2011 +0530 ARM: OMAP4: PM: Initialise all the clockdomains to supported states Initialise hardware supervised mode for all clockdomains if it's supported. Initiate sleep transition for other clockdomains, if they are not being used. [2], http://www.spinics.net/lists/linux-omap/msg61911.html [3], 3.6.12.3 of OMAP4 TRM [4], diff --git a/arch/arm/mach-omap2/clockdomains44xx_data.c b/arch/arm/mach-omap2/clockdomains44xx_data.c index 9299ac2..41d2260 100644 --- a/arch/arm/mach-omap2/clockdomains44xx_data.c +++ b/arch/arm/mach-omap2/clockdomains44xx_data.c @@ -390,7 +390,7 @@ static struct clockdomain emu_sys_44xx_clkdm = { .prcm_partition = OMAP4430_PRM_PARTITION, .cm_inst = OMAP4430_PRM_EMU_CM_INST, .clkdm_offs = OMAP4430_PRM_EMU_CM_EMU_CDOFFS, - .flags = CLKDM_CAN_HWSUP, + .flags = CLKDM_CAN_SWSUP, }; static struct clockdomain l3_dma_44xx_clkdm = { -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
