diff options
Diffstat (limited to 'drivers/staging/csr/csr_time.h')
| -rw-r--r-- | drivers/staging/csr/csr_time.h | 82 |
1 files changed, 22 insertions, 60 deletions
diff --git a/drivers/staging/csr/csr_time.h b/drivers/staging/csr/csr_time.h index 2a45f3e4024d..fc29e8e5e478 100644 --- a/drivers/staging/csr/csr_time.h +++ b/drivers/staging/csr/csr_time.h @@ -2,77 +2,43 @@ #define CSR_TIME_H__ /***************************************************************************** - (c) Cambridge Silicon Radio Limited 2010 - All rights reserved and confidential information of CSR +(c) Cambridge Silicon Radio Limited 2010 +All rights reserved and confidential information of CSR - Refer to LICENSE.txt included with this source for details - on the license terms. +Refer to LICENSE.txt included with this source for details +on the license terms. *****************************************************************************/ #include <linux/types.h> -#ifdef __cplusplus -extern "C" { -#endif - -/******************************************************************************* - - NAME - CsrTime - - DESCRIPTION - Type to hold a value describing the current system time, which is a - measure of time elapsed since some arbitrarily defined fixed time - reference, usually associated with system startup. - -*******************************************************************************/ -typedef u32 CsrTime; - - /******************************************************************************* - NAME - CsrTimeUtc +NAME + CsrTimeGet - DESCRIPTION - Type to hold a value describing a UTC wallclock time expressed in - seconds and milliseconds elapsed since midnight January 1st 1970. +DESCRIPTION + Returns the current system time in a low and a high part. The low part + is expressed in microseconds. The high part is incremented when the low + part wraps to provide an extended range. -*******************************************************************************/ -typedef struct -{ - u32 sec; - u16 msec; -} CsrTimeUtc; - - -/******************************************************************************* - - NAME - CsrTimeGet + The caller may provide a NULL pointer as the high parameter. + In this case the function just returns the low part and ignores the + high parameter. - DESCRIPTION - Returns the current system time in a low and a high part. The low part - is expressed in microseconds. The high part is incremented when the low - part wraps to provide an extended range. + Although the time is expressed in microseconds the actual resolution is + platform dependent and can be less. It is recommended that the + resolution is at least 10 milliseconds. - The caller may provide a NULL pointer as the high parameter. In this case - the function just returns the low part and ignores the high parameter. +PARAMETERS + high - Pointer to variable that will receive the high part of the + current system time. Passing NULL is valid. - Although the time is expressed in microseconds the actual resolution is - platform dependent and can be less. It is recommended that the - resolution is at least 10 milliseconds. - - PARAMETERS - high - Pointer to variable that will receive the high part of the - current system time. Passing NULL is valid. - - RETURNS - Low part of current system time in microseconds. +RETURNS + Low part of current system time in microseconds. *******************************************************************************/ -CsrTime CsrTimeGet(CsrTime *high); +u32 CsrTimeGet(u32 *high); /*------------------------------------------------------------------*/ @@ -107,8 +73,4 @@ CsrTime CsrTimeGet(CsrTime *high); *----------------------------------------------------------------------------*/ #define CsrTimeSub(t1, t2) ((s32) (t1) - (s32) (t2)) -#ifdef __cplusplus -} -#endif - #endif |