[PATCHv2 07/25] clk: fix clock tree dump to properly dump out every registered clock

[Tero Kristo]

Some clocks are not associated to a DM node, so just parsing the DM is not
enough. This is especially true for root clocks, which typically don't have
any parents. Instead, fetch every registered UCLASS_CLK instance, and dump
these out.

Signed-off-by: Tero Kristo <t-kri...@ti.com>
---
 cmd/clk.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/cmd/clk.c b/cmd/clk.c
index e3c3d2f9bb..0245b97136 100644
--- a/cmd/clk.c
+++ b/cmd/clk.c
@@ -18,11 +18,14 @@ static void show_clks(struct udevice *dev, int depth, int 
last_flag)
 {
        int i, is_last;
        struct udevice *child;
-       struct clk *clkp;
+       struct clk *clkp, *parent;
        u32 rate;
 
        clkp = dev_get_clk_ptr(dev);
        if (device_get_uclass_id(dev) == UCLASS_CLK && clkp) {
+               parent = clk_get_parent(clkp);
+               if (!IS_ERR(parent) && depth == -1)
+                       return;
                depth++;
                rate = clk_get_rate(clkp);
 
@@ -47,6 +50,9 @@ static void show_clks(struct udevice *dev, int depth, int 
last_flag)
        }
 
        list_for_each_entry(child, &dev->child_head, sibling_node) {
+               if (child == dev)
+                       continue;
+
                is_last = list_is_last(&child->sibling_node, &dev->child_head);
                show_clks(child, depth, (last_flag << 1) | is_last);
        }
@@ -54,14 +60,19 @@ static void show_clks(struct udevice *dev, int depth, int 
last_flag)
 
 int __weak soc_clk_dump(void)
 {
-       struct udevice *root;
+       struct udevice *dev;
+       struct uclass *uc;
+       int ret;
 
-       root = dm_root();
-       if (root) {
-               printf(" Rate               Usecnt      Name\n");
-               printf("------------------------------------------\n");
-               show_clks(root, -1, 0);
-       }
+       ret = uclass_get(UCLASS_CLK, &uc);
+       if (ret)
+               return ret;
+
+       printf(" Rate               Usecnt      Name\n");
+       printf("------------------------------------------\n");
+
+       uclass_foreach_dev(dev, uc)
+               show_clks(dev, -1, 0);
 
        return 0;
 }
-- 
2.17.1

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