commit 6e480c9572925a4ea8aac45a10a306e0c4e509a9
Author: Miroslav Lichvar <mlichvar@redhat.com>
Date:   Thu Jan 11 11:33:54 2024 +0100

    Revert default PTP version to 2.0 for better compatibility.
    
    Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>

diff --git a/config.c b/config.c
index 398b420..d7775c0 100644
--- a/config.c
+++ b/config.c
@@ -319,7 +319,7 @@ struct config_item config_tab[] = {
 	GLOB_ITEM_STR("productDescription", ";;"),
 	PORT_ITEM_STR("ptp_dst_mac", "01:1B:19:00:00:00"),
 	PORT_ITEM_STR("p2p_dst_mac", "01:80:C2:00:00:0E"),
-	GLOB_ITEM_INT("ptp_minor_version", 1, 0, 1),
+	GLOB_ITEM_INT("ptp_minor_version", 0, 0, 1),
 	GLOB_ITEM_STR("refclock_sock_address", "/var/run/refclock.ptp.sock"),
 	GLOB_ITEM_STR("revisionData", ";;"),
 	GLOB_ITEM_INT("sanity_freq_limit", 200000000, 0, INT_MAX),
diff --git a/configs/default.cfg b/configs/default.cfg
index 0c7661c..8f94c16 100644
--- a/configs/default.cfg
+++ b/configs/default.cfg
@@ -46,7 +46,7 @@ power_profile.2011.networkTimeInaccuracy	-1
 power_profile.2017.totalTimeInaccuracy		-1
 power_profile.grandmasterID			0
 power_profile.version				none
-ptp_minor_version       1
+ptp_minor_version       0
 #
 # Run time options
 #
diff --git a/msg.h b/msg.h
index 9c80f45..786ddc7 100644
--- a/msg.h
+++ b/msg.h
@@ -32,7 +32,7 @@
 
 /* Version definition for IEEE 1588-2019 */
 #define PTP_MAJOR_VERSION	2
-#define PTP_MINOR_VERSION	1
+#define PTP_MINOR_VERSION	0
 #define PTP_VERSION		(PTP_MINOR_VERSION << 4 | PTP_MAJOR_VERSION)
 
 #define MAJOR_VERSION_MASK	0x0f
diff --git a/ptp4l.8 b/ptp4l.8
index 4cb9adb..c59b0b4 100644
--- a/ptp4l.8
+++ b/ptp4l.8
@@ -813,7 +813,7 @@ The default is 128.
 .TP
 .B ptp_minor_version
 This option sets the minorVersionPTP in the common PTP message header.
-The default is 1.
+The default (specific to the installed linuxptp package) is 0.
 
 .TP
 .B refclock_sock_address