After syncing the sunxi dts files with the upstream kernel dm/fdt sunxi
builds would no longer boot.
The problem is that stdout-path is now set like this in the upstream dts
files: stdout-path = "serial0:115200n8". The use of options in of-paths,
either after an alias name, or after a full path, e.g. stdout-path =
"/soc@01c00000/serial@01c28000:115200", is standard of usage, but something
which the u-boot dts code so far did not handle.
This commit fixes this, adding support for both path formats.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
arch/arm/dts/sun7i-a20-pcduino3.dts | 2 +-
lib/libfdt/fdt_ro.c | 25 ++++++++++++++++++++++---
2 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/arch/arm/dts/sun7i-a20-pcduino3.dts
b/arch/arm/dts/sun7i-a20-pcduino3.dts
index cd05267..624abf2 100644
--- a/arch/arm/dts/sun7i-a20-pcduino3.dts
+++ b/arch/arm/dts/sun7i-a20-pcduino3.dts
@@ -64,7 +64,7 @@
};
chosen {
- stdout-path = "serial0:115200n8";
+ stdout-path = "/soc@01c00000/serial@01c28000:115200";
};
leds {
diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c
index 03733e5..44fc0aa 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -113,6 +113,25 @@ int fdt_subnode_offset(const void *fdt, int parentoffset,
return fdt_subnode_offset_namelen(fdt, parentoffset, name,
strlen(name));
}
+/*
+ * Find the next of path seperator, note we need to search for both '/' and ':'
+ * and then take the first one so that we do the rigth thing for e.g.
+ * "foo/bar:option" and "bar:option/otheroption", both of which happen, so
+ * first searching for either ':' or '/' does not work.
+ */
+static const char *fdt_path_next_seperator(const char *path)
+{
+ const char *sep1 = strchr(path, '/');
+ const char *sep2 = strchr(path, ':');
+
+ if (sep1 && sep2)
+ return (sep1 < sep2) ? sep1 : sep2;
+ else if (sep1)
+ return sep1;
+ else
+ return sep2;
+}
+
int fdt_path_offset(const void *fdt, const char *path)
{
const char *end = path + strlen(path);
@@ -123,7 +142,7 @@ int fdt_path_offset(const void *fdt, const char *path)
/* see if we have an alias */
if (*path != '/') {
- const char *q = strchr(path, '/');
+ const char *q = fdt_path_next_seperator(path);
if (!q)
q = end;
@@ -141,9 +160,9 @@ int fdt_path_offset(const void *fdt, const char *path)
while (*p == '/')
p++;
- if (! *p)
+ if (*p == '\0' || *p == ':')
return offset;
- q = strchr(p, '/');
+ q = fdt_path_next_seperator(p);
if (! q)
q = end;
--
2.3.5
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