clk: tegra: Constify peripheral clock registers

The peripheral clock registers are defined in static tables. These
tables never need to be modified at runtime, so they can reside in
read-only memory.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/clk/tegra/clk-periph-gate.c

@@ -134,7 +134,7 @@ struct clk *tegra_clk_register_periph_gate(const char *name,
 	struct tegra_clk_periph_gate *gate;
 	struct clk *clk;
 	struct clk_init_data init;
-	struct tegra_clk_periph_regs *pregs;
+	const struct tegra_clk_periph_regs *pregs;
 
 	pregs = get_reg_bank(clk_num);
 	if (!pregs)

drivers/clk/tegra/clk-periph.c

@@ -145,7 +145,7 @@ static struct clk *_tegra_clk_register_periph(const char *name,
 {
 	struct clk *clk;
 	struct clk_init_data init;
-	struct tegra_clk_periph_regs *bank;
+	const struct tegra_clk_periph_regs *bank;
 	bool div = !(periph->gate.flags & TEGRA_PERIPH_NO_DIV);
 
 	if (periph->gate.flags & TEGRA_PERIPH_NO_DIV) {

drivers/clk/tegra/clk-tegra-periph.c

@@ -877,7 +877,7 @@ static void __init periph_clk_init(void __iomem *clk_base,
 	struct clk **dt_clk;
 
 	for (i = 0; i < ARRAY_SIZE(periph_clks); i++) {
-		struct tegra_clk_periph_regs *bank;
+		const struct tegra_clk_periph_regs *bank;
 		struct tegra_periph_init_data *data;
 
 		data = periph_clks + i;

drivers/clk/tegra/clk.c

@@ -84,7 +84,7 @@ static int (*special_reset_assert)(unsigned long);
 static int (*special_reset_deassert)(unsigned long);
 static unsigned int num_special_reset;
 
-static struct tegra_clk_periph_regs periph_regs[] = {
+static const struct tegra_clk_periph_regs periph_regs[] = {
 	[0] = {
 		.enb_reg = CLK_OUT_ENB_L,
 		.enb_set_reg = CLK_OUT_ENB_SET_L,
@@ -182,7 +182,7 @@ static int tegra_clk_rst_deassert(struct reset_controller_dev *rcdev,
 	return -EINVAL;
 }
 
-struct tegra_clk_periph_regs *get_reg_bank(int clkid)
+const struct tegra_clk_periph_regs *get_reg_bank(int clkid)
 {
 	int reg_bank = clkid / 32;
 

drivers/clk/tegra/clk.h

@@ -496,7 +496,7 @@ struct tegra_clk_periph_gate {
 	u8			flags;
 	int			clk_num;
 	int			*enable_refcnt;
-	struct tegra_clk_periph_regs	*regs;
+	const struct tegra_clk_periph_regs *regs;
 };
 
 #define to_clk_periph_gate(_hw)					\
@@ -716,7 +716,7 @@ void tegra_init_from_table(struct tegra_clk_init_table *tbl,
 void tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list,
 		struct clk *clks[], int clk_max);
 
-struct tegra_clk_periph_regs *get_reg_bank(int clkid);
+const struct tegra_clk_periph_regs *get_reg_bank(int clkid);
 struct clk **tegra_clk_init(void __iomem *clk_base, int num, int periph_banks);
 
 struct clk **tegra_lookup_dt_id(int clk_id, struct tegra_clk *tegra_clk);