diff options
Diffstat (limited to 'arch/x86/kernel/mfgpt_32.c')
-rw-r--r-- | arch/x86/kernel/mfgpt_32.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/arch/x86/kernel/mfgpt_32.c b/arch/x86/kernel/mfgpt_32.c index 9146b2de1698..586228140b9e 100644 --- a/arch/x86/kernel/mfgpt_32.c +++ b/arch/x86/kernel/mfgpt_32.c | |||
@@ -12,21 +12,20 @@ | |||
12 | */ | 12 | */ |
13 | 13 | ||
14 | /* | 14 | /* |
15 | * We are using the 32Khz input clock - its the only one that has the | 15 | * We are using the 32.768kHz input clock - it's the only one that has the |
16 | * ranges we find desirable. The following table lists the suitable | 16 | * ranges we find desirable. The following table lists the suitable |
17 | * divisors and the associated hz, minimum interval | 17 | * divisors and the associated Hz, minimum interval and the maximum interval: |
18 | * and the maximum interval: | ||
19 | * | 18 | * |
20 | * Divisor Hz Min Delta (S) Max Delta (S) | 19 | * Divisor Hz Min Delta (s) Max Delta (s) |
21 | * 1 32000 .0005 2.048 | 20 | * 1 32768 .00048828125 2.000 |
22 | * 2 16000 .001 4.096 | 21 | * 2 16384 .0009765625 4.000 |
23 | * 4 8000 .002 8.192 | 22 | * 4 8192 .001953125 8.000 |
24 | * 8 4000 .004 16.384 | 23 | * 8 4096 .00390625 16.000 |
25 | * 16 2000 .008 32.768 | 24 | * 16 2048 .0078125 32.000 |
26 | * 32 1000 .016 65.536 | 25 | * 32 1024 .015625 64.000 |
27 | * 64 500 .032 131.072 | 26 | * 64 512 .03125 128.000 |
28 | * 128 250 .064 262.144 | 27 | * 128 256 .0625 256.000 |
29 | * 256 125 .128 524.288 | 28 | * 256 128 .125 512.000 |
30 | */ | 29 | */ |
31 | 30 | ||
32 | #include <linux/kernel.h> | 31 | #include <linux/kernel.h> |
@@ -45,7 +44,7 @@ static struct mfgpt_timer_t { | |||
45 | 44 | ||
46 | #define MFGPT_DIVISOR 16 | 45 | #define MFGPT_DIVISOR 16 |
47 | #define MFGPT_SCALE 4 /* divisor = 2^(scale) */ | 46 | #define MFGPT_SCALE 4 /* divisor = 2^(scale) */ |
48 | #define MFGPT_HZ (32000 / MFGPT_DIVISOR) | 47 | #define MFGPT_HZ (32768 / MFGPT_DIVISOR) |
49 | #define MFGPT_PERIODIC (MFGPT_HZ / HZ) | 48 | #define MFGPT_PERIODIC (MFGPT_HZ / HZ) |
50 | 49 | ||
51 | #ifdef CONFIG_GEODE_MFGPT_TIMER | 50 | #ifdef CONFIG_GEODE_MFGPT_TIMER |