1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/clk/vexpress/clk-vexpress-osc.c b/drivers/clk/vexpress/clk-vexpress-osc.c
new file mode 100644
index 0000000000..c0d6e6066e
--- /dev/null
+++ b/drivers/clk/vexpress/clk-vexpress-osc.c
@@ -0,0 +1,42 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+/*
+ * This represents the vexpress-osc as a fixed clock, which isn't really
+ * accurate, as this clock allows rate changes in real implementations. As those
+ * would need access to the config bus, a whole lot more infrastructure would be
+ * needed. We skip this complication for now, as we don't have a use-case, yet.
+ */
+static int vexpress_osc_setup(struct device_node *node)
+{
+	struct clk *clk;
+	u32 range[2];
+	const char *name;
+
+	if (of_property_read_u32_array(node, "freq-range", range,
+				       ARRAY_SIZE(range)))
+		return -EINVAL;
+
+	if (of_property_read_string(node, "clock-output-names", &name))
+		return -EINVAL;
+
+	clk = clk_fixed(name, range[0]);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	return of_clk_add_provider(node, of_clk_src_simple_get, clk);
+}
+CLK_OF_DECLARE(vexpress_osc, "arm,vexpress-osc", vexpress_osc_setup);