dm: core: add clocks node scan
Currently, all fixed-clock declared in "clocks" node in device tree
can be binded by clk_fixed_rate.c driver only if each of them have
the "simple-bus" compatible string.
This constraint has been invoked here [1].
This patch offers a solution to avoid adding "simple-bus" compatible
string to nodes that are not busses.
[1] https://patchwork.ozlabs.org/patch/558837/
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/root.c b/drivers/core/root.c
index d691d6f..757d109 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -312,8 +312,38 @@
#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
+int dm_extended_scan_fdt(const void *blob, bool pre_reloc_only)
+{
+ int node, ret;
+
+ ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
+ if (ret) {
+ debug("dm_scan_fdt() failed: %d\n", ret);
+ return ret;
+ }
+
+ /* bind fixed-clock */
+ node = ofnode_to_offset(ofnode_path("/clocks"));
+ /* if no DT "clocks" node, no need to go further */
+ if (node < 0)
+ return ret;
+
+ ret = dm_scan_fdt_node(gd->dm_root, gd->fdt_blob, node,
+ pre_reloc_only);
+ if (ret)
+ debug("dm_scan_fdt_node() failed: %d\n", ret);
+
+ return ret;
+}
+
__weak int dm_scan_other(bool pre_reloc_only)
{
return 0;
@@ -335,9 +365,9 @@
}
if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
- ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
+ ret = dm_extended_scan_fdt(gd->fdt_blob, pre_reloc_only);
if (ret) {
- debug("dm_scan_fdt() failed: %d\n", ret);
+ debug("dm_extended_scan_dt() failed: %d\n", ret);
return ret;
}
}