This patch populates the platform from the device tree into two steps:
the first step creates the nodes that are referenced by a phandle,
the second step creates the other nodes.
This permits to reduce the number of PROBE_DEFERs.
Signed-off-by: Jean-Francois Moine <moin...@free.fr>
---
A better way to reduce probe deferral could be sorting the nodes
according to their phandle level in the DT blob at compilation time ...
---
drivers/of/platform.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index e0a6514..a2ea858 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -382,8 +382,23 @@ static int of_platform_bus_create(struct device_node *bus,
if (!dev || !of_match_node(matches, bus))
return 0;
+ /* first step: create the nodes that are referenced by phandle */
for_each_child_of_node(bus, child) {
- pr_debug(" create child: %s\n", child->full_name);
+ if (child->phandle == 0)
+ continue;
+ pr_debug(" create child 1: %s\n", child->full_name);
+ rc = of_platform_bus_create(child, matches, lookup, &dev->dev,
strict);
+ if (rc) {
+ of_node_put(child);
+ return rc;
+ }
+ }
+
+ /* second step: create the other nodes */
+ for_each_child_of_node(bus, child) {
+ if (child->phandle != 0)
+ continue;
+ pr_debug(" create child 2: %s\n", child->full_name);
rc = of_platform_bus_create(child, matches, lookup, &dev->dev,
strict);
if (rc) {
of_node_put(child);
--
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
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