of/platform: Generalize /reserved-memory handling

By iterating over all /reserved-memory child nodes and match each one to
a list of compatibles that we want to treat specially, we can easily
extend the list of compatibles to handle - without having to resort to
of_platform_populate() that would create unnecessary platform_devices.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

1 files changed, 10 insertions, 8 deletions

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index ac15d0e3d27d..922b46646bcc 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -497,6 +497,11 @@ int of_platform_default_populate(struct device_node *root,
 EXPORT_SYMBOL_GPL(of_platform_default_populate);
 
 #ifndef CONFIG_PPC
+static const struct of_device_id reserved_mem_matches[] = {
+        { .compatible = "ramoops" },
+        {}
+};
+
 static int __init of_platform_default_populate_init(void)
 {
         struct device_node *node;
@@ -505,15 +510,12 @@ static int __init of_platform_default_populate_init(void)
                 return -ENODEV;
 
         /*
-         * Handle ramoops explicitly, since it is inside /reserved-memory,
-         * which lacks a "compatible" property.
+         * Handle certain compatibles explicitly, since we don't want to create
+         * platform_devices for every node in /reserved-memory with a
+         * "compatible",
          */
-        node = of_find_node_by_path("/reserved-memory");
-        if (node) {
-                node = of_find_compatible_node(node, NULL, "ramoops");
-                if (node)
-                        of_platform_device_create(node, NULL, NULL);
-        }
+        for_each_matching_node(node, reserved_mem_matches)
+                of_platform_device_create(node, NULL, NULL);
 
         /* Populate everything else. */
         of_platform_default_populate(NULL, NULL, NULL);