X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fhardware%2Fbaylibre-acme%2Fprotocol.c;h=f8fdb595435a21a49dc18fa6dcb03fcc9e16b331;hb=aae2273b99b9155ea1b91bc65eb4c91e06e3c8e2;hp=ca09eba069c51a0c017f851b53b31d5779346d58;hpb=1fe04eb8d6c84c0013413991d0632022fc0643f7;p=libsigrok.git

diff --git a/src/hardware/baylibre-acme/protocol.c b/src/hardware/baylibre-acme/protocol.c
index ca09eba0..f8fdb595 100644
--- a/src/hardware/baylibre-acme/protocol.c
+++ b/src/hardware/baylibre-acme/protocol.c
@@ -295,6 +295,43 @@ static int get_shunt_path(const struct sr_channel_group *cg, GString *path)
 	return ret;
 }
 
+/*
+ * Try setting the update_interval sysfs attribute for each probe according
+ * to samplerate.
+ */
+SR_PRIV void bl_acme_maybe_set_update_interval(const struct sr_dev_inst *sdi,
+					       uint64_t samplerate)
+{
+	struct sr_channel_group *cg;
+	struct channel_group_priv *cgp;
+	GString *hwmon;
+	GSList *l;
+	FILE *fd;
+
+	for (l = sdi->channel_groups; l != NULL; l = l->next) {
+		cg = l->data;
+		cgp = cg->priv;
+
+		hwmon = g_string_sized_new(64);
+		g_string_append_printf(hwmon,
+				"/sys/class/hwmon/hwmon%d/update_interval",
+				cgp->hwmon_num);
+
+		if (g_file_test(hwmon->str, G_FILE_TEST_EXISTS)) {
+			fd = g_fopen(hwmon->str, "w");
+			if (!fd) {
+				g_string_free(hwmon, TRUE);
+				continue;
+			}
+
+			g_fprintf(fd, "%" PRIu64 "\n", 1000 / samplerate);
+			fclose(fd);
+		}
+
+		g_string_free(hwmon, TRUE);
+	}
+}
+
 SR_PRIV int bl_acme_get_shunt(const struct sr_channel_group *cg,
 			      uint64_t *shunt)
 {
@@ -387,6 +424,11 @@ SR_PRIV int bl_acme_set_power_off(const struct sr_channel_group *cg,
 	}
 
 	val = sr_gpio_setval_export(pws_gpios[cgp->index], off ? 0 : 1);
+	if (val < 0) {
+		sr_err("Error setting power-off state: gpio: %d",
+		       pws_gpios[cgp->index]);
+		return SR_ERR_IO;
+	}
 
 	return SR_OK;
 }