diff options
Diffstat (limited to 'include/asm-i386')
-rw-r--r-- | include/asm-i386/mach-default/mach_time.h | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/include/asm-i386/mach-default/mach_time.h b/include/asm-i386/mach-default/mach_time.h index b749aa44a86f..ff03cf0fdc3c 100644 --- a/include/asm-i386/mach-default/mach_time.h +++ b/include/asm-i386/mach-default/mach_time.h | |||
@@ -82,21 +82,8 @@ static inline int mach_set_rtc_mmss(unsigned long nowtime) | |||
82 | static inline unsigned long mach_get_cmos_time(void) | 82 | static inline unsigned long mach_get_cmos_time(void) |
83 | { | 83 | { |
84 | unsigned int year, mon, day, hour, min, sec; | 84 | unsigned int year, mon, day, hour, min, sec; |
85 | int i; | ||
86 | 85 | ||
87 | /* The Linux interpretation of the CMOS clock register contents: | 86 | do { |
88 | * When the Update-In-Progress (UIP) flag goes from 1 to 0, the | ||
89 | * RTC registers show the second which has precisely just started. | ||
90 | * Let's hope other operating systems interpret the RTC the same way. | ||
91 | */ | ||
92 | /* read RTC exactly on falling edge of update flag */ | ||
93 | for (i = 0 ; i < 1000000 ; i++) /* may take up to 1 second... */ | ||
94 | if (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP) | ||
95 | break; | ||
96 | for (i = 0 ; i < 1000000 ; i++) /* must try at least 2.228 ms */ | ||
97 | if (!(CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP)) | ||
98 | break; | ||
99 | do { /* Isn't this overkill ? UIP above should guarantee consistency */ | ||
100 | sec = CMOS_READ(RTC_SECONDS); | 87 | sec = CMOS_READ(RTC_SECONDS); |
101 | min = CMOS_READ(RTC_MINUTES); | 88 | min = CMOS_READ(RTC_MINUTES); |
102 | hour = CMOS_READ(RTC_HOURS); | 89 | hour = CMOS_READ(RTC_HOURS); |
@@ -104,6 +91,7 @@ static inline unsigned long mach_get_cmos_time(void) | |||
104 | mon = CMOS_READ(RTC_MONTH); | 91 | mon = CMOS_READ(RTC_MONTH); |
105 | year = CMOS_READ(RTC_YEAR); | 92 | year = CMOS_READ(RTC_YEAR); |
106 | } while (sec != CMOS_READ(RTC_SECONDS)); | 93 | } while (sec != CMOS_READ(RTC_SECONDS)); |
94 | |||
107 | if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) | 95 | if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) |
108 | { | 96 | { |
109 | BCD_TO_BIN(sec); | 97 | BCD_TO_BIN(sec); |