clk: tegra: add common infra for DT clocks

Introduce a common infrastructure for sharing clock initialization between
SoCs.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c
index 3a95a8757ebc..a0430cd65d7c 100644
--- a/drivers/clk/tegra/clk.c
+++ b/drivers/clk/tegra/clk.c
@@ -212,6 +212,15 @@ void __init tegra_add_of_provider(struct device_node *np)
         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 }
 
+struct clk ** __init tegra_lookup_dt_id(int clk_id,
+                                        struct tegra_clk *tegra_clk)
+{
+        if (tegra_clk[clk_id].present)
+                return &clks[tegra_clk[clk_id].dt_id];
+        else
+                return NULL;
+}
+
 tegra_clk_apply_init_table_func tegra_clk_apply_init_table;
 
 void __init tegra_clocks_apply_init_table(void)
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index c49df4dc5ac6..489dad59d1d5 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -568,6 +568,11 @@ struct tegra_clk_duplicate {
                 },                              \
         }
 
+struct tegra_clk {
+        int                     dt_id;
+        bool                    present;
+};
+
 void tegra_init_from_table(struct tegra_clk_init_table *tbl,
                 struct clk *clks[], int clk_max);
 
@@ -577,6 +582,8 @@ void tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list,
 struct tegra_clk_periph_regs *get_reg_bank(int clkid);
 struct clk **tegra_clk_init(int num, int periph_banks);
 
+struct clk **tegra_lookup_dt_id(int clk_id, struct tegra_clk *tegra_clk);
+
 void tegra_add_of_provider(struct device_node *np);
 
 void tegra114_clock_tune_cpu_trimmers_high(void);