1 files changed, 47 insertions, 0 deletions
diff --git a/kernel/drivers/clocksource/clksrc-probe.c b/kernel/drivers/clocksource/clksrc-probe.c
new file mode 100644
index 000000000..7cb6c923a
--- /dev/null
+++ b/kernel/drivers/clocksource/clksrc-probe.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/clocksource.h>
+
+extern struct of_device_id __clksrc_of_table[];
+
+static const struct of_device_id __clksrc_of_table_sentinel
+	__used __section(__clksrc_of_table_end);
+
+void __init clocksource_probe(void)
+{
+	struct device_node *np;
+	const struct of_device_id *match;
+	of_init_fn_1 init_func;
+	unsigned clocksources = 0;
+
+	for_each_matching_node_and_match(np, __clksrc_of_table, &match) {
+		if (!of_device_is_available(np))
+			continue;
+
+		init_func = match->data;
+		init_func(np);
+		clocksources++;
+	}
+
+	clocksources += acpi_probe_device_table(clksrc);
+
+	if (!clocksources)
+		pr_crit("%s: no matching clocksources found\n", __func__);
+}