[U-Boot] [PATCH] Tegra114: Initialize System Counter (TSC) with osc frequency

[Stephen Warren]

On 04/03/2013 05:12 PM, Tom Warren wrote:
> T114 needs the SYSCTR0 counter initialized so the TSC can be
> read by the kernel. Do it in the bootloader since it's a write-once
> deal (secure/non-secure mode dependent).

> diff --git a/arch/arm/cpu/tegra-common/clock.c b/arch/arm/cpu/tegra-common/clock.c

> @@ -557,4 +557,7 @@ void clock_init(void)
...
> +	/* Do any special system timer/TSC setup */
> +	arch_timer_init();

I wonder if we shouldn't ifdef that, so that ...

> diff --git a/arch/arm/cpu/tegra20-common/clock.c b/arch/arm/cpu/tegra20-common/clock.c

> +void arch_timer_init(void)
> +{
> +}

We don't need those stubs on the chips that don't support this. (I
imagine that for future chips, the implementation will be common and
will move out of the chip-specific file into some arch-timers file).

Either way though,
Reviewed-by: Stephen Warren <swarren at nvidia.com>