From: Patrice Chotard <patrice.chot...@st.com>

Currently, all fixed-clock declared in "clocks" node in device tree
can be binded by clk_fixed_rate.c driver only if the "simple-bus"
compatible string is set inside "clocks" node.
This constraint has been invoked here [1].

This patch offers a solution to avoid adding "simple-bus" compatible
string to "clocks" node.

[1] https://patchwork.ozlabs.org/patch/558837/

Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
 drivers/core/root.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/core/root.c b/drivers/core/root.c
index d691d6f..f285df8 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -312,6 +312,12 @@ int dm_scan_fdt(const void *blob, bool pre_reloc_only)
 #endif
        return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only);
 }
+#else
+static int dm_scan_fdt_node(struct udevice *parent, const void *blob,
+                           int offset, bool pre_reloc_only)
+{
+       return 0;
+}
 #endif
 
 __weak int dm_scan_other(bool pre_reloc_only)
@@ -322,6 +328,7 @@ __weak int dm_scan_other(bool pre_reloc_only)
 int dm_init_and_scan(bool pre_reloc_only)
 {
        int ret;
+       int node;
 
        ret = dm_init(IS_ENABLED(CONFIG_OF_LIVE));
        if (ret) {
@@ -340,6 +347,12 @@ int dm_init_and_scan(bool pre_reloc_only)
                        debug("dm_scan_fdt() failed: %d\n", ret);
                        return ret;
                }
+
+               /* bind fixed-clock */
+               node = fdt_path_offset(gd->fdt_blob, "/clocks");
+               if (node >= 0)
+                       dm_scan_fdt_node(gd->dm_root, gd->fdt_blob, node,
+                                        pre_reloc_only);
        }
 
        ret = dm_scan_other(pre_reloc_only);
-- 
1.9.1

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