clk: ti: Optionally parse IO address from parent clock node

If no reg property is specified for a TI clock, let's try to use the
parent clock node IO address. This way we can avoid duplicate devicetree
reg properties that cause warnings for unique_unit_address.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20220204071449.16762-4-tony@atomide.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index 29eafab..a0ddf16 100644 (file)
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -274,6 +274,8 @@ 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) {
@@ -284,8 +286,12 @@ 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;