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Date: Tue, 30 Jun 2015 16:51:14 +0200
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <robh+dt@...nel.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH/RFC 1/3] of: Extract of_alias_create()
Extract the code to create and add an alias from of_alias_scan() into
its own function of_alias_create().
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
drivers/of/base.c | 58 ++++++++++++++++++++++++++++++------------------------
include/linux/of.h | 2 ++
2 files changed, 34 insertions(+), 26 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index d48ff7391fa77d86..390f9e2b7b65d54b 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1891,6 +1891,37 @@ static void of_alias_add(struct alias_prop *ap, struct device_node *np,
ap->alias, ap->stem, ap->id, of_node_full_name(np));
}
+void of_alias_create(struct property *pp,
+ void * (*dt_alloc)(u64 size, u64 align))
+{
+ const char *start = pp->name;
+ const char *end = start + strlen(start);
+ struct device_node *np;
+ struct alias_prop *ap;
+ int id, len;
+
+ np = of_find_node_by_path(pp->value);
+ if (!np)
+ return;
+
+ /* walk the alias backwards to extract the id and work out
+ * the 'stem' string */
+ while (isdigit(*(end-1)) && end > start)
+ end--;
+ len = end - start;
+
+ if (kstrtoint(end, 10, &id) < 0)
+ return;
+
+ /* Allocate an alias_prop with enough space for the stem */
+ ap = dt_alloc(sizeof(*ap) + len + 1, 4);
+ if (!ap)
+ return;
+ memset(ap, 0, sizeof(*ap) + len + 1);
+ ap->alias = start;
+ of_alias_add(ap, np, id, start, len);
+}
+
/**
* of_alias_scan - Scan all properties of the 'aliases' node
*
@@ -1925,38 +1956,13 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
return;
for_each_property_of_node(of_aliases, pp) {
- const char *start = pp->name;
- const char *end = start + strlen(start);
- struct device_node *np;
- struct alias_prop *ap;
- int id, len;
-
/* Skip those we do not want to proceed */
if (!strcmp(pp->name, "name") ||
!strcmp(pp->name, "phandle") ||
!strcmp(pp->name, "linux,phandle"))
continue;
- np = of_find_node_by_path(pp->value);
- if (!np)
- continue;
-
- /* walk the alias backwards to extract the id and work out
- * the 'stem' string */
- while (isdigit(*(end-1)) && end > start)
- end--;
- len = end - start;
-
- if (kstrtoint(end, 10, &id) < 0)
- continue;
-
- /* Allocate an alias_prop with enough space for the stem */
- ap = dt_alloc(sizeof(*ap) + len + 1, 4);
- if (!ap)
- continue;
- memset(ap, 0, sizeof(*ap) + len + 1);
- ap->alias = start;
- of_alias_add(ap, np, id, start, len);
+ of_alias_create(pp, dt_alloc);
}
}
diff --git a/include/linux/of.h b/include/linux/of.h
index c7715d0b56344fe7..0852625e4cfb3dfe 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -333,6 +333,8 @@ extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
extern int of_count_phandle_with_args(const struct device_node *np,
const char *list_name, const char *cells_name);
+extern void of_alias_create(struct property *pp,
+ void * (*dt_alloc)(u64 size, u64 align));
extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
extern int of_alias_get_id(struct device_node *np, const char *stem);
extern int of_alias_get_highest_id(const char *stem);
--
1.9.1
--
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