On Thu, Mar 19, 2015 at 04:45:35PM +0000, York Sun wrote: > The timer clock is system clock divided by 4, not fixed 12MHz. This is > common to the SoC, not board specific. > > Signed-off-by: York Sun <york...@freescale.com> > --- > README | 8 ++++++++ > arch/arm/cpu/armv8/fsl-lsch3/cpu.c | 24 ++++++++++++++++++++++++ > board/freescale/ls2085a/ls2085a.c | 18 ------------------ > include/configs/ls2085a_common.h | 6 +++++- > 4 files changed, 37 insertions(+), 19 deletions(-) > > diff --git a/README b/README > index f473515..776ebf4 100644 > --- a/README > +++ b/README > @@ -690,6 +690,14 @@ The following options need to be configured: > exists, unlike the similar options in the Linux kernel. Do not > set these options unless they apply! > > + COUNTER_FREQUENCY > + Generic timer clock source frequency. > + > + COUNTER_FREQUENCY_REAL > + Generic timer clock source frequency if the real clock is > + different from COUNTER_FREQUENCY, and can only be determined > + at run time. > + > NOTE: The following can be machine specific errata. These > do have ability to provide rudimentary version and machine > specific checks, but expect no product checks. > diff --git a/arch/arm/cpu/armv8/fsl-lsch3/cpu.c > b/arch/arm/cpu/armv8/fsl-lsch3/cpu.c > index 94fd147..e985181 100644 > --- a/arch/arm/cpu/armv8/fsl-lsch3/cpu.c > +++ b/arch/arm/cpu/armv8/fsl-lsch3/cpu.c > @@ -395,3 +395,27 @@ int arch_early_init_r(void) > > return 0; > } > + > +int timer_init(void) > +{ > + u32 __iomem *cntcr = (u32 *)CONFIG_SYS_FSL_TIMER_ADDR; > + u32 __iomem *cltbenr = (u32 *)CONFIG_SYS_FSL_PMU_CLTBENR; > +#ifdef COUNTER_FREQUENCY_REAL > + unsigned long cntfrq = COUNTER_FREQUENCY_REAL; > + > + /* Update with accurate clock frequency */ > + asm volatile("msr cntfrq_el0, %0" : : "r" (cntfrq) : "memory"); > +#endif
Is this executed on all CPUs, or do secondary CPUs have CNTFRQ programmed with the correct value elsewhere? Mark. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot