[U-Boot] [PATCH 04/20] tegra: Provide more accurate microsecond time

[Stephen Warren]

On 02/17/2015 03:29 PM, Simon Glass wrote:
> Add an implementation of the timer functions for tegra, so that timing
> is more accurate. Tegra has a 1 microsecond timer for this purpose.

I'm a bit confused about this:

include/configs/tegra-common.h:32:#define CONFIG_SYS_TIMER_COUNTER 
NV_PA_TMRUS_BASE

lib/time.c:

#ifdef CONFIG_SYS_TIMER_COUNTER
unsigned long notrace timer_read_counter(void)
{
#ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
         return ~readl(CONFIG_SYS_TIMER_COUNTER);
#else
         return readl(CONFIG_SYS_TIMER_COUNTER);
#endif
}

Doesn't that provide the same set of features, without requiring 
Tegra-specific code?