AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

ARM: Realview/Versatile: remove useless TIMER_RELOAD calculations

Browse Source 
Realview/Versatile copied the Integrator timer code, including the
calculations for ensuring that the reload value fits into the 16-bit
counter.  However, these platforms have a 32-bit counter which is
clocked at a slower rate.

The result is that the preprocessor conditions are never triggered:
TICKS_PER_uSEC = 1, mSEC_10 = 10000, which is 0x2710 - less than
0x10000.

So, remove the unnecessary complexity, reducing the TIMER_RELOAD
calculation to just:

	TICKS_PER_uSEC * mSEC_10

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-01-14 22:37:12 +00:00
parent e388771458
commit fe8e1a57f0
1 changed files with 1 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/arm/plat-versatile/timer-sp.c
View File

@ -33,17 +33,7 @@
/*
* How long is the timer interval?
*/
#define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10)
#if TIMER_INTERVAL >= 0x100000
#define TIMER_RELOAD (TIMER_INTERVAL >> 8)
#define TIMER_DIVISOR (TIMER_CTRL_DIV256)
#elif TIMER_INTERVAL >= 0x10000
#define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */
#define TIMER_DIVISOR (TIMER_CTRL_DIV16)
#else
#define TIMER_RELOAD (TIMER_INTERVAL)
#define TIMER_DIVISOR (TIMER_CTRL_DIV1)
#endif
#define TIMER_RELOAD (TICKS_PER_uSEC * mSEC_10)
static void __iomem *clksrc_base;