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xtensa: cleanup ccount frequency tracking

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Remove unused nsec_per_ccount, and rename ccount_per_jiffy to ccount_preq.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Baruch Siach 2013-06-17 11:29:43 +03:00 committed by Chris Zankel
parent ed9dfed62c
commit e504c4b607
5 changed files with 8 additions and 12 deletions
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5
arch/xtensa/include/asm/timex.h
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@ -36,9 +36,8 @@
#endif
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
extern unsigned long ccount_per_jiffy;
extern unsigned long nsec_per_ccount;
#define CCOUNT_PER_JIFFY ccount_per_jiffy
extern unsigned long ccount_freq;
#define CCOUNT_PER_JIFFY (ccount_freq / HZ)
#else
#define CCOUNT_PER_JIFFY (CONFIG_XTENSA_CPU_CLOCK*(1000000UL/HZ))
#endif

2
arch/xtensa/kernel/platform.c
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@ -41,6 +41,6 @@ _F(void, pcibios_init, (void), { });
_F(void, calibrate_ccount, (void),
{
pr_err("ERROR: Cannot calibrate cpu frequency! Assuming 10MHz.\n");
ccount_per_jiffy = 10 * (1000000UL/HZ);
ccount_freq = 10 * 1000000UL;
});
#endif

7
arch/xtensa/kernel/time.c
View File

@ -28,8 +28,7 @@
#include <asm/platform.h>
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
unsigned long ccount_per_jiffy; /* per 1/HZ */
unsigned long nsec_per_ccount; /* nsec per ccount increment */
unsigned long ccount_freq; /* ccount Hz */
#endif
static cycle_t ccount_read(struct clocksource *cs)
@ -57,8 +56,8 @@ void __init time_init(void)
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
printk("Calibrating CPU frequency ");
platform_calibrate_ccount();
printk("%d.%02d MHz\n", (int)ccount_per_jiffy/(1000000/HZ),
(int)(ccount_per_jiffy/(10000/HZ))%100);
printk("%d.%02d MHz\n", (int)ccount_freq/1000000,
(int)(ccount_freq/10000)%100);
#endif
clocksource_register_hz(&ccount_clocksource, CCOUNT_PER_JIFFY * HZ);

3
arch/xtensa/platforms/xtfpga/setup.c
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@ -179,8 +179,7 @@ void __init platform_calibrate_ccount(void)
if (!clk_freq)
clk_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
ccount_per_jiffy = clk_freq / HZ;
nsec_per_ccount = 1000000000UL / clk_freq;
ccount_freq = clk_freq;
}
#endif

3
arch/xtensa/variants/s6000/delay.c
View File

@ -22,6 +22,5 @@ void platform_calibrate_ccount(void)
a = b;
} while (--i >= 0);
b -= a;
nsec_per_ccount = (LOOPS * 10000) / b;
ccount_per_jiffy = b * (100000UL / (LOOPS * HZ));
ccount_freq = b * (100000UL / LOOPS);
}