clk: renesas: Add Gen2 clock core

Add common clock code for Renesas RCar Gen2 platforms.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/clk/renesas/rcar-gen2-cpg.h b/drivers/clk/renesas/rcar-gen2-cpg.h
new file mode 100644
index 0000000..913c932
--- /dev/null
+++ b/drivers/clk/renesas/rcar-gen2-cpg.h
@@ -0,0 +1,49 @@
+/*
+ * R-Car Gen2 Clock Pulse Generator
+ *
+ * Copyright (C) 2016 Cogent Embedded Inc.
+ *
+ * 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; version 2 of the License.
+ */
+
+#ifndef __CLK_RENESAS_RCAR_GEN2_CPG_H__
+#define __CLK_RENESAS_RCAR_GEN2_CPG_H__
+
+enum rcar_gen2_clk_types {
+	CLK_TYPE_GEN2_MAIN = CLK_TYPE_CUSTOM,
+	CLK_TYPE_GEN2_PLL0,
+	CLK_TYPE_GEN2_PLL1,
+	CLK_TYPE_GEN2_PLL3,
+	CLK_TYPE_GEN2_Z,
+	CLK_TYPE_GEN2_LB,
+	CLK_TYPE_GEN2_ADSP,
+	CLK_TYPE_GEN2_SDH,
+	CLK_TYPE_GEN2_SD0,
+	CLK_TYPE_GEN2_SD1,
+	CLK_TYPE_GEN2_QSPI,
+	CLK_TYPE_GEN2_RCAN,
+};
+
+struct rcar_gen2_cpg_pll_config {
+	unsigned int extal_div;
+	unsigned int pll1_mult;
+	unsigned int pll3_mult;
+	unsigned int pll0_mult;		/* leave as zero if PLL0CR exists */
+};
+
+struct gen2_clk_priv {
+	void __iomem		*base;
+	struct cpg_mssr_info	*info;
+	struct clk		clk_extal;
+	struct clk		clk_extal_usb;
+	const struct rcar_gen2_cpg_pll_config *cpg_pll_config;
+};
+
+int gen2_clk_probe(struct udevice *dev);
+int gen2_clk_remove(struct udevice *dev);
+
+extern const struct clk_ops gen2_clk_ops;
+
+#endif