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-rw-r--r--udev.75
-rw-r--r--udev.xml7
-rw-r--r--udev_rules.c6
3 files changed, 18 insertions, 0 deletions
diff --git a/udev.7 b/udev.7
index a4b15886c7..4fbaf92432 100644
--- a/udev.7
+++ b/udev.7
@@ -362,6 +362,11 @@ The node name of the parent device.
The udev_root value.
.RE
.PP
+\fB$sys\fR, \fB%S\fR
+.RS 4
+The sysfs mount point.
+.RE
+.PP
\fB$tempnode\fR, \fB%N\fR
.RS 4
The name of a created temporary device node to provide access to the device from a external program before the real node is created.
diff --git a/udev.xml b/udev.xml
index 5ba3d3636c..1f9e6d9197 100644
--- a/udev.xml
+++ b/udev.xml
@@ -530,6 +530,13 @@
</varlistentry>
<varlistentry>
+ <term><option>$sys</option>, <option>%S</option></term>
+ <listitem>
+ <para>The sysfs mount point.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>$tempnode</option>, <option>%N</option></term>
<listitem>
<para>The name of a created temporary device node to provide access to
diff --git a/udev_rules.c b/udev_rules.c
index 1139c99a7d..e61c9a69b0 100644
--- a/udev_rules.c
+++ b/udev_rules.c
@@ -292,6 +292,7 @@ void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_ROOT,
+ SUBST_SYS,
SUBST_ENV,
};
static const struct subst_map {
@@ -311,6 +312,7 @@ void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
{ .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
+ { .name = "sys", .fmt = 'S', .type = SUBST_SYS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
{ NULL, '\0', 0 }
};
@@ -516,6 +518,10 @@ found:
strlcat(string, udev_root, maxsize);
dbg("substitute udev_root '%s'", udev_root);
break;
+ case SUBST_SYS:
+ strlcat(string, sysfs_path, maxsize);
+ dbg("substitute sysfs_path '%s'", sysfs_path);
+ break;
case SUBST_ENV:
if (attr == NULL) {
dbg("missing attribute");