[boot-wrapper PATCH] Makefile: Change COUNTER_FREQ to 100 MHz

[Mark Rutland]

On Tue, Feb 15, 2022 at 11:54:18AM +0000, Peter Hoyes wrote:
> From: Peter Hoyes <Peter.Hoyes at arm.com>
> 
> Older Arm Fast Models (AEM < RevC) had a base frequency of 24 MHz. but
> the RevC base models use 100 MHz. There is not a robust method of
> determining the configured base frequency at runtime, so update
> COUNTER_FREQ to be 100 MHz.

This looks right to me; if no-one shouts in the next day or two I'll apply
this.

In future, if we need this to be configurable, I reckon we can either add a
specific option for this or a more general "platform" option which can also
know about other things which aren't in the DTB.

Thanks,
Mark.

> 
> Signed-off-by: Peter Hoyes <Peter.Hoyes at arm.com>
> ---
>  Makefile.am | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Makefile.am b/Makefile.am
> index 08e304a..6ebece2 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -13,7 +13,7 @@ SCRIPT_DIR	:= $(top_srcdir)/scripts
>  PHYS_OFFSET	:= $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findmem.pl $(KERNEL_DTB))
>  UART_BASE	:= $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findbase.pl $(KERNEL_DTB) 0 'arm,pl011')
>  SYSREGS_BASE	:= $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findbase.pl $(KERNEL_DTB) 0 'arm,vexpress-sysreg' 2> /dev/null)
> -COUNTER_FREQ	:= 24000000
> +COUNTER_FREQ	:= 100000000
>  
>  CPU_IDS		:= $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findcpuids.pl $(KERNEL_DTB))
>  NR_CPUS         := $(shell echo $(CPU_IDS) | tr ',' ' ' | wc -w)
> -- 
> 2.25.1
>