clk: uniphier: add core support code for UniPhier clock driver

This includes UniPhier clock driver code, except SoC-specific
data arrays.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/clk/uniphier/clk-uniphier-fixed-factor.c b/drivers/clk/uniphier/clk-uniphier-fixed-factor.c
new file mode 100644
index 000000000000..da2d9f47ef9f
--- /dev/null
+++ b/drivers/clk/uniphier/clk-uniphier-fixed-factor.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2016 Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * 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 <linux/clk-provider.h>
+#include <linux/device.h>
+
+#include "clk-uniphier.h"
+
+struct clk_hw *uniphier_clk_register_fixed_factor(struct device *dev,
+						  const char *name,
+			const struct uniphier_clk_fixed_factor_data *data)
+{
+	struct clk_fixed_factor *fix;
+	struct clk_init_data init;
+	int ret;
+
+	fix = devm_kzalloc(dev, sizeof(*fix), GFP_KERNEL);
+	if (!fix)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.ops = &clk_fixed_factor_ops;
+	init.flags = data->parent_name ? CLK_SET_RATE_PARENT : 0;
+	init.parent_names = data->parent_name ? &data->parent_name : NULL;
+	init.num_parents = data->parent_name ? 1 : 0;
+
+	fix->mult = data->mult;
+	fix->div = data->div;
+	fix->hw.init = &init;
+
+	ret = devm_clk_hw_register(dev, &fix->hw);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return &fix->hw;
+}