diff --git a/drivers/clk/renesas/r8a77970-cpg-mssr.c b/drivers/clk/renesas/r8a77970-cpg-mssr.c
index f5d77df..32923b4 100644
--- a/drivers/clk/renesas/r8a77970-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a77970-cpg-mssr.c
@@ -1,13 +1,12 @@
-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: GPL-2.0
 /*
- * Renesas R8A77970 CPG MSSR driver
+ * r8a77970 Clock Pulse Generator / Module Standby and Software Reset
  *
- * Copyright (C) 2017-2018 Marek Vasut <marek.vasut@gmail.com>
+ * Copyright (C) 2017-2018 Cogent Embedded Inc.
  *
- * Based on the following driver from Linux kernel:
- * r8a7796 Clock Pulse Generator / Module Standby and Software Reset
+ * Based on r8a7795-cpg-mssr.c
  *
- * Copyright (C) 2016 Glider bvba
+ * Copyright (C) 2015 Glider bvba
  */
 
 #include <common.h>
@@ -42,7 +41,7 @@
 	MOD_CLK_BASE
 };
 
-static const struct cpg_core_clk r8a77970_core_clks[] = {
+static const struct cpg_core_clk r8a77970_core_clks[] __initconst = {
 	/* External Clock Inputs */
 	DEF_INPUT("extal",	CLK_EXTAL),
 	DEF_INPUT("extalr",	CLK_EXTALR),
@@ -57,6 +56,7 @@
 	DEF_FIXED(".pll1_div4",	CLK_PLL1_DIV4,	CLK_PLL1_DIV2,	2, 1),
 
 	/* Core Clock Outputs */
+	DEF_FIXED("z2",		R8A77970_CLK_Z2,    CLK_PLL1_DIV4,  1, 1),
 	DEF_FIXED("ztr",	R8A77970_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
 	DEF_FIXED("ztrd2",	R8A77970_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
 	DEF_FIXED("zt",		R8A77970_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
@@ -87,7 +87,7 @@
 	DEF_FIXED("r",		R8A77970_CLK_R,	    CLK_EXTALR,	   1, 1),
 };
 
-static const struct mssr_mod_clk r8a77970_mod_clks[] = {
+static const struct mssr_mod_clk r8a77970_mod_clks[] __initconst = {
 	DEF_MOD("tmu4",			 121,	R8A77970_CLK_S2D2),
 	DEF_MOD("tmu3",			 122,	R8A77970_CLK_S2D2),
 	DEF_MOD("tmu2",			 123,	R8A77970_CLK_S2D2),
@@ -166,7 +166,7 @@
 					 (((md) & BIT(13)) >> 12) | \
 					 (((md) & BIT(19)) >> 19))
 
-static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[8] = {
+static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[8] __initconst = {
 	/* EXTAL div	PLL1 mult/div	PLL3 mult/div */
 	{ 1,		192,	1,	96,	1,	},
 	{ 1,		192,	1,	80,	1,	},