1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c
new file mode 100644
index 0000000000..52e7c16c49
--- /dev/null
+++ b/drivers/clk/clk-fixed-factor.c
@@ -0,0 +1,63 @@
+/*
+ * clk-fixed-factor.c - generic barebox clock support. Based on Linux clk support
+ *
+ * Copyright (c) 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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 <io.h>
+#include <malloc.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+struct clk_fixed_factor {
+	struct clk clk;
+	int mult;
+	int div;
+	const char *parent;
+};
+
+static unsigned long clk_fixed_factor_recalc_rate(struct clk *clk,
+		unsigned long parent_rate)
+{
+	struct clk_fixed_factor *f = container_of(clk, struct clk_fixed_factor, clk);
+
+	return (parent_rate / f->div) * f->mult;
+}
+
+struct clk_ops clk_fixed_factor_ops = {
+	.recalc_rate = clk_fixed_factor_recalc_rate,
+};
+
+struct clk *clk_fixed_factor(const char *name,
+		const char *parent, unsigned int mult, unsigned int div)
+{
+	struct clk_fixed_factor *f = xzalloc(sizeof(*f));
+	int ret;
+
+	f->mult = mult;
+	f->div = div;
+	f->parent = parent;
+	f->clk.ops = &clk_fixed_factor_ops;
+	f->clk.name = name;
+	f->clk.parent_names = &f->parent;
+	f->clk.num_parents = 1;
+
+	ret = clk_register(&f->clk);
+	if (ret) {
+		free(f);
+		return ERR_PTR(ret);
+	}
+
+	return &f->clk;
+}