linux-kernel - [PATCH v4 2/2] PTP: add support for one-shot output

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Message-Id: <20190911061622.774006-2-felipe.balbi@linux.intel.com>
Date:   Wed, 11 Sep 2019 09:16:22 +0300
From:   Felipe Balbi <felipe.balbi@...ux.intel.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     Christopher S Hall <christopher.s.hall@...el.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: [PATCH v4 2/2] PTP: add support for one-shot output

Some controllers allow for a one-shot output pulse, in contrast to
periodic output. Now that we have extensible versions of our IOCTLs, we
can finally make use of the 'flags' field to pass a bit telling driver
that if we want one-shot pulse output.

Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
---

Changes since v3:
	- Remove bogus bitwise negation

Changes since v2:
	- Add _PEROUT_ to bit macro

Changes since v1:
	- remove comment from .flags field

 include/uapi/linux/ptp_clock.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/uapi/linux/ptp_clock.h b/include/uapi/linux/ptp_clock.h
index 9a0af3511b68..f16301015949 100644
--- a/include/uapi/linux/ptp_clock.h
+++ b/include/uapi/linux/ptp_clock.h
@@ -38,8 +38,8 @@
 /*
  * Bits of the ptp_perout_request.flags field:
  */
-#define PTP_PEROUT_VALID_FLAGS (0)
-
+#define PTP_PEROUT_ONE_SHOT (1<<0)
+#define PTP_PEROUT_VALID_FLAGS	(PTP_PEROUT_ONE_SHOT)
 /*
  * struct ptp_clock_time - represents a time value
  *
@@ -77,7 +77,7 @@ 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. */
+	unsigned int flags;
 	unsigned int rsv[4];          /* Reserved for future use. */
 };
 
-- 
2.23.0