config: convert 'clock_servo' to the new scheme.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>

clock.c

@@ -800,11 +800,12 @@ static void clock_remove_port(struct clock *c, struct port *p)
 
 struct clock *clock_create(struct config *config, int phc_index,
 			   struct interfaces_head *ifaces,
-			   struct default_ds *dds, enum servo_type servo)
+			   struct default_ds *dds)
 {
 	enum timestamp_type timestamping =
 		config_get_int(config, NULL, "time_stamping");
 	int fadj = 0, max_adj = 0, sw_ts = timestamping == TS_SOFTWARE ? 1 : 0;
+	enum servo_type servo = config_get_int(config, NULL, "clock_servo");
 	struct clock *c = &the_clock;
 	struct port *p;
 	char phc[32];

clock.h

@@ -73,12 +73,11 @@ struct config *clock_config(struct clock *c);
  *                     Pass -1 to select CLOCK_REALTIME.
  * @param ifaces       A queue of network interfaces.
  * @param dds          A pointer to a default data set for the clock.
- * @param servo        The servo that this clock will use.
  * @return             A pointer to the single global clock instance.
  */
 struct clock *clock_create(struct config *config, int phc_index,
 			   struct interfaces_head *ifaces,
-			   struct default_ds *dds, enum servo_type servo);
+			   struct default_ds *dds);
 
 /**
  * Obtains a clock's default data set.

config.c

@@ -110,6 +110,14 @@ struct config_item {
 #define PORT_ITEM_INT(label, _default, min, max) \
 	CONFIG_ITEM_INT(label, 1, _default, min, max)
 
+static struct config_enum clock_servo_enu[] = {
+	{ "pi",     CLOCK_SERVO_PI     },
+	{ "linreg", CLOCK_SERVO_LINREG },
+	{ "ntpshm", CLOCK_SERVO_NTPSHM },
+	{ "nullf",  CLOCK_SERVO_NULLF  },
+	{ NULL, 0 },
+};
+
 static struct config_enum delay_filter_enu[] = {
 	{ "moving_average", FILTER_MOVING_AVERAGE },
 	{ "moving_median",  FILTER_MOVING_MEDIAN  },
@@ -152,6 +160,7 @@ struct config_item config_tab[] = {
 	GLOB_ITEM_INT("check_fup_sync", 0, 0, 1),
 	GLOB_ITEM_INT("clockAccuracy", 0xfe, 0, UINT8_MAX),
 	GLOB_ITEM_INT("clockClass", 248, 0, UINT8_MAX),
+	GLOB_ITEM_ENU("clock_servo", CLOCK_SERVO_PI, clock_servo_enu),
 	PORT_ITEM_INT("delayAsymmetry", 0, INT_MIN, INT_MAX),
 	PORT_ITEM_ENU("delay_filter", FILTER_MOVING_MEDIAN, delay_filter_enu),
 	PORT_ITEM_INT("delay_filter_length", 10, 1, INT_MAX),
@@ -445,18 +454,6 @@ static enum parser_result parse_global_setting(const char *option,
 			return OUT_OF_RANGE;
 		strncpy(cfg->uds_address, value, MAX_IFNAME_SIZE);
 
-	} else if (!strcmp(option, "clock_servo")) {
-		if (!strcasecmp("pi", value))
-			cfg->clock_servo = CLOCK_SERVO_PI;
-		else if (!strcasecmp("linreg", value))
-			cfg->clock_servo = CLOCK_SERVO_LINREG;
-		else if (!strcasecmp("ntpshm", value))
-			cfg->clock_servo = CLOCK_SERVO_NTPSHM;
-		else if (!strcasecmp("nullf", value))
-			cfg->clock_servo = CLOCK_SERVO_NULLF;
-		else
-			return BAD_VALUE;
-
 	} else if (!strcmp(option, "productDescription")) {
 		if (count_char(value, ';') != 2)
 			return BAD_VALUE;

config.h

@@ -47,8 +47,6 @@ struct config {
 
 	/* the rest are legacy fields */
 	struct default_ds dds;
-	enum servo_type clock_servo;
-
 	unsigned char *ptp_dst_mac;
 	unsigned char *p2p_dst_mac;
 	char *uds_address;

ptp4l.c

@@ -59,8 +59,6 @@ static struct config cfg_settings = {
 		},
 	},
 
-	.clock_servo = CLOCK_SERVO_PI,
-
 	.ptp_dst_mac = ptp_dst_mac,
 	.p2p_dst_mac = p2p_dst_mac,
 	.uds_address = uds_path,
@@ -236,7 +234,7 @@ int main(int argc, char *argv[])
 	    ds->flags & DDS_SLAVE_ONLY) {
 		ds->clockQuality.clockClass = 255;
 	}
-	if (cfg_settings.clock_servo == CLOCK_SERVO_NTPSHM) {
+	if (config_get_int(cfg, NULL, "clock_servo") == CLOCK_SERVO_NTPSHM) {
 		config_set_int(cfg, "kernel_leap", 0);
 		config_set_int(cfg, "sanity_freq_limit", 0);
 	}
@@ -332,8 +330,7 @@ int main(int argc, char *argv[])
 
 	clock = clock_create(&cfg_settings,
 			     phc_index, &cfg_settings.interfaces,
-			     &cfg_settings.dds,
+			     &cfg_settings.dds);
-			     cfg_settings.clock_servo);
 	if (!clock) {
 		fprintf(stderr, "failed to create a clock\n");
 		return -1;