Add SR_CONF key for sound pressure level measurement range

hwdriver.c

@@ -91,6 +91,8 @@ static struct sr_config_info sr_config_info_data[] = {
 		"Hold max", NULL},
 	{SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
 		"Hold min", NULL},
+	{SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range",
+		"Sound pressure level measurement range", NULL},
 	{0, 0, NULL, NULL, NULL},
 };
 

libsigrok.h

@@ -141,6 +141,7 @@ enum {
 	SR_T_RATIONAL_PERIOD,
 	SR_T_RATIONAL_VOLT,
 	SR_T_KEYVALUE,
+	SR_T_UINT64_RANGE,
 };
 
 /** Value for sr_datafeed_packet.type. */
@@ -671,6 +672,9 @@ enum {
 	/** Sound pressure level time weighting.  */
 	SR_CONF_SPL_WEIGHT_TIME,
 
+	/** Sound pressure level measurement range.  */
+	SR_CONF_SPL_MEASUREMENT_RANGE,
+
 	/** Max hold mode. */
 	SR_CONF_HOLD_MAX,