* Tony Lindgren <tony@xxxxxxxxxxx> [131010 10:23]: > * Santosh Shilimkar <santosh.shilimkar@xxxxxx> [131010 06:20]: > > On Thursday 10 October 2013 03:43 AM, Sricharan R wrote: > > > From: R Sricharan <r.sricharan@xxxxxx> > > > > > > The realtime counter called master counter, produces the count > > > used by the private timer peripherals in the MPU_CLUSTER. The > > > CNTFRQ per cpu register is used to denote the frequency of the counter. > > > Currently the frequency value is passed from the > > > DT file, but this is not scalable when we have other non-DT guest > > > OS. This register must be set to the right value by the > > > secure rom code. Setting this register helps in propagating the right > > > frequency value across OSes. > > > > > > More discussions and the reason for adding this in a non-DT > > > way can be seen from below. > > > http://www.mail-archive.com/linux-omap@xxxxxxxxxxxxxxx/msg93832.html > > > > > > So configuring this secure register for all the cpus here. > > > > > > Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx> > > > Cc: Nishanth Menon <nm@xxxxxx> > > > Cc: Rajendra Nayak <rnayak@xxxxxx> > > > Cc: Marc Zyngier <marc.zyngier@xxxxxxx> > > > Cc: Mark Rutland <mark.rutland@xxxxxxx> > > > Cc: Tony Lindgren <tony@xxxxxxxxxxx> > > > Tested-by: Nishanth Menon <nm@xxxxxx> > > > Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx> > > > Signed-off-by: Sricharan R <r.sricharan@xxxxxx> > > > --- > > > [V5] Removed the use of extern variable in omap-smp.c > > > as per suggestion from Santosh Shilimkar <santosh.shilimkar@xxxxxx> > > > > > Thanks for the updates Sricharan. Looks fine now. > > > > Tony, Can you apply this version if you are fine with it. > > Yes thanks looks good to me now. Applying into omap-for-v3.13/soc. Grr, had to apply the following fix on top of this for some configs. Tony 8< --------------------------- From: Tony Lindgren <tony@xxxxxxxxxxx> Date: Fri, 11 Oct 2013 17:28:04 -0700 Subject: [PATCH] ARM: OMAP2+: Fix build error for realtime counter init if not enabled Otherwise we can get an error with some configs: arch/arm/mach-omap2/timer.c:73: undefined reference to `omap_smc1' Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -66,12 +66,15 @@ static struct omap_dm_timer clkev; static struct clock_event_device clockevent_gpt; + +#ifdef CONFIG_SOC_HAS_REALTIME_COUNTER static unsigned long arch_timer_freq; void set_cntfreq(void) { omap_smc1(OMAP5_DRA7_MON_SET_CNTFRQ_INDEX, arch_timer_freq); } +#endif static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id) { -- 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
