linux-kernel - [RFC PATCH 4/5] PTP: Add flag for non-periodic output

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Message-Id: <20190716072038.8408-5-felipe.balbi@linux.intel.com>
Date:   Tue, 16 Jul 2019 10:20:37 +0300
From:   Felipe Balbi <felipe.balbi@...ux.intel.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     netdev@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org,
        "Christopher S . Hall" <christopher.s.hall@...el.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: [RFC PATCH 4/5] PTP: Add flag for non-periodic output

When this new flag is set, we can use single-shot output.

Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
---
 include/uapi/linux/ptp_clock.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/ptp_clock.h b/include/uapi/linux/ptp_clock.h
index 674db7de64f3..439cbdfc3d9b 100644
--- a/include/uapi/linux/ptp_clock.h
+++ b/include/uapi/linux/ptp_clock.h
@@ -67,7 +67,9 @@ struct ptp_perout_request {
 	struct ptp_clock_time start;  /* Absolute start time. */
 	struct ptp_clock_time period; /* Desired period, zero means disable. */
 	unsigned int index;           /* Which channel to configure. */
-	unsigned int flags;           /* Reserved for future use. */
+
+#define PTP_PEROUT_ONE_SHOT BIT(0)
+	unsigned int flags;           /* Bit 0 -> oneshot output. */
 	unsigned int rsv[4];          /* Reserved for future use. */
 };
 
-- 
2.22.0