From 6caeef6ee5795232b78c8986619f8919e2b09c8c Mon Sep 17 00:00:00 2001
From: Bert Vermeulen <bert@biot.com>
Date: Wed, 19 Jun 2013 12:18:00 +0200
Subject: [PATCH] Add SR_CONF key for data source

---
 hwdriver.c  |  2 ++
 libsigrok.h | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/hwdriver.c b/hwdriver.c
index 0b7be522..d9a0273c 100644
--- a/hwdriver.c
+++ b/hwdriver.c
@@ -95,6 +95,8 @@ static struct sr_config_info sr_config_info_data[] = {
 		"Sound pressure level measurement range", NULL},
 	{SR_CONF_POWER_OFF, SR_T_BOOL, "power_off",
 		"Power off", NULL},
+	{SR_CONF_DATA_SOURCE, SR_T_CHAR, "data_source",
+		"Data source", NULL},
 	{0, 0, NULL, NULL, NULL},
 };
 
diff --git a/libsigrok.h b/libsigrok.h
index 7019fdb2..2f7047a4 100644
--- a/libsigrok.h
+++ b/libsigrok.h
@@ -704,6 +704,18 @@ enum {
 	/** Power off the device. */
 	SR_CONF_POWER_OFF,
 
+	/** Data source for acquisition. If not present, acquisition from
+	 * the device is always "live", i.e. acquisition starts when the
+	 * frontend asks and the results are sent out as soon as possible.
+	 *
+	 * If present, it indicates that either the device has no live
+	 * acquisition capability (for example a pure data logger), or
+	 * there is a choice. sr_config_list() returns those choices.
+	 *
+	 * In any case if a device has live acquisition capabilities, it
+	 * is always the default. */
+	SR_CONF_DATA_SOURCE,
+
 	/*--- Acquisition modes ---------------------------------------------*/
 
 	/**