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path: root/drivers/clocksource/clksrc-probe.c
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Diffstat (limited to 'drivers/clocksource/clksrc-probe.c')
-rw-r--r--drivers/clocksource/clksrc-probe.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/clocksource/clksrc-probe.c b/drivers/clocksource/clksrc-probe.c
new file mode 100644
index 000000000000..7cb6c923a836
--- /dev/null
+++ b/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__);
+}

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