From ea1cc3ee34a5f3144f6c2cdc07c19c914ccb9526 Mon Sep 17 00:00:00 2001 From: Min Li Date: Wed, 24 Jan 2024 13:49:46 -0500 Subject: ptp: introduce PTP_CLOCK_EXTOFF event for the measured external offset This change is for the PHC devices that can measure the phase offset between PHC signal and the external signal, such as the 1PPS signal of GNSS. Reporting PTP_CLOCK_EXTOFF to user space will be piggy-backed to the existing ptp_extts_event so that application such as ts2phc can poll the external offset the same way as extts. Hence, ts2phc can use the offset to achieve the alignment between PHC and the external signal by the help of either SW or HW filters. Signed-off-by: Min Li Acked-by: Richard Cochran Signed-off-by: David S. Miller --- include/uapi/linux/ptp_clock.h | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'include/uapi') diff --git a/include/uapi/linux/ptp_clock.h b/include/uapi/linux/ptp_clock.h index da700999cad4..053b40d642de 100644 --- a/include/uapi/linux/ptp_clock.h +++ b/include/uapi/linux/ptp_clock.h @@ -32,6 +32,7 @@ #define PTP_RISING_EDGE (1<<1) #define PTP_FALLING_EDGE (1<<2) #define PTP_STRICT_FLAGS (1<<3) +#define PTP_EXT_OFFSET (1<<4) #define PTP_EXTTS_EDGES (PTP_RISING_EDGE | PTP_FALLING_EDGE) /* @@ -40,7 +41,8 @@ #define PTP_EXTTS_VALID_FLAGS (PTP_ENABLE_FEATURE | \ PTP_RISING_EDGE | \ PTP_FALLING_EDGE | \ - PTP_STRICT_FLAGS) + PTP_STRICT_FLAGS | \ + PTP_EXT_OFFSET) /* * flag fields valid for the original PTP_EXTTS_REQUEST ioctl. @@ -50,6 +52,11 @@ PTP_RISING_EDGE | \ PTP_FALLING_EDGE) +/* + * flag fields valid for the ptp_extts_event report. + */ +#define PTP_EXTTS_EVENT_VALID (PTP_ENABLE_FEATURE) + /* * Bits of the ptp_perout_request.flags field: */ @@ -228,9 +235,9 @@ struct ptp_pin_desc { #define PTP_MASK_EN_SINGLE _IOW(PTP_CLK_MAGIC, 20, unsigned int) struct ptp_extts_event { - struct ptp_clock_time t; /* Time event occured. */ + struct ptp_clock_time t; /* Time event occurred. */ unsigned int index; /* Which channel produced the event. */ - unsigned int flags; /* Reserved for future use. */ + unsigned int flags; /* Event type. */ unsigned int rsv[2]; /* Reserved for future use. */ }; -- cgit v1.2.3