1 files changed, 76 insertions, 10 deletions

diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index 3da33c786d77..3463579220b5 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -119,19 +119,58 @@ int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops)
 	return 0;
 }
 
+/*
+ * Eventually we could standardize to using '_' for clk-*.c files to follow the
+ * TRM naming and leave out the tmp name here.
+ */
+static struct device_node *ti_find_clock_provider(struct device_node *from,
+						  const char *name)
+{
+	struct device_node *np;
+	bool found = false;
+	const char *n;
+	char *tmp;
+
+	tmp = kstrdup(name, GFP_KERNEL);
+	if (!tmp)
+		return NULL;
+	strreplace(tmp, '-', '_');
+
+	/* Node named "clock" with "clock-output-names" */
+	for_each_of_allnodes_from(from, np) {
+		if (of_property_read_string_index(np, "clock-output-names",
+						  0, &n))
+			continue;
+
+		if (!strncmp(n, tmp, strlen(tmp))) {
+			found = true;
+			break;
+		}
+	}
+	of_node_put(from);
+	kfree(tmp);
+
+	if (found)
+		return np;
+
+	/* Fall back to using old node name base provider name */
+	return of_find_node_by_name(from, name);
+}
+
 /**
  * ti_dt_clocks_register - register DT alias clocks during boot
  * @oclks: list of clocks to register
  *
  * Register alias or non-standard DT clock entries during boot. By
- * default, DT clocks are found based on their node name. If any
+ * default, DT clocks are found based on their clock-output-names
+ * property, or the clock node name for legacy cases. If any
  * additional con-id / dev-id -> clock mapping is required, use this
  * function to list these.
  */
 void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
 {
 	struct ti_dt_clk *c;
-	struct device_node *node, *parent;
+	struct device_node *node, *parent, *child;
 	struct clk *clk;
 	struct of_phandle_args clkspec;
 	char buf[64];
@@ -168,13 +207,16 @@ void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
 		if (num_args && clkctrl_nodes_missing)
 			continue;
 
-		node = of_find_node_by_name(NULL, buf);
+		node = ti_find_clock_provider(NULL, buf);
 		if (num_args && compat_mode) {
 			parent = node;
-			node = of_get_child_by_name(parent, "clock");
-			if (!node)
-				node = of_get_child_by_name(parent, "clk");
-			of_node_put(parent);
+			child = of_get_child_by_name(parent, "clock");
+			if (!child)
+				child = of_get_child_by_name(parent, "clk");
+			if (child) {
+				of_node_put(parent);
+				node = child;
+			}
 		}
 
 		clkspec.np = node;
@@ -271,6 +313,8 @@ int ti_clk_get_reg_addr(struct device_node *node, int index,
 	for (i = 0; i < CLK_MAX_MEMMAPS; i++) {
 		if (clocks_node_ptr[i] == node->parent)
 			break;
+		if (clocks_node_ptr[i] == node->parent->parent)
+			break;
 	}
 
 	if (i == CLK_MAX_MEMMAPS) {
@@ -281,8 +325,12 @@ int ti_clk_get_reg_addr(struct device_node *node, int index,
 	reg->index = i;
 
 	if (of_property_read_u32_index(node, "reg", index, &val)) {
-		pr_err("%pOFn must have reg[%d]!\n", node, index);
-		return -EINVAL;
+		if (of_property_read_u32_index(node->parent, "reg",
+					       index, &val)) {
+			pr_err("%pOFn or parent must have reg[%d]!\n",
+			       node, index);
+			return -EINVAL;
+		}
 	}
 
 	reg->offset = val;
@@ -400,6 +448,24 @@ static const struct of_device_id simple_clk_match_table[] __initconst = {
 };
 
 /**
+ * ti_dt_clk_name - init clock name from first output name or node name
+ * @np: device node
+ *
+ * Use the first clock-output-name for the clock name if found. Fall back
+ * to legacy naming based on node name.
+ */
+const char *ti_dt_clk_name(struct device_node *np)
+{
+	const char *name;
+
+	if (!of_property_read_string_index(np, "clock-output-names", 0,
+					   &name))
+		return name;
+
+	return np->name;
+}
+
+/**
  * ti_clk_add_aliases - setup clock aliases
  *
  * Sets up any missing clock aliases. No return value.
@@ -415,7 +481,7 @@ void __init ti_clk_add_aliases(void)
 		clkspec.np = np;
 		clk = of_clk_get_from_provider(&clkspec);
 
-		ti_clk_add_alias(NULL, clk, np->name);
+		ti_clk_add_alias(NULL, clk, ti_dt_clk_name(np));
 	}
 }