[PATCH] Add modalias to macio sysfs attributes

Provide a "compatible" entry in /sys/bus/macio/devices/*/ This can be used
to load drivers via the modules.alias file.

Signed-off-by: Olaf Hering <olh@suse.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/drivers/macintosh/macio_sysfs.c b/drivers/macintosh/macio_sysfs.c
index 97d22bb4516ac2a73449d8551430c47a75eb4e1e..7f7d4eaca870ac3650d4b0523355bd7bf7e22117 100644 (file)
--- a/drivers/macintosh/macio_sysfs.c
+++ b/drivers/macintosh/macio_sysfs.c
@@ -39,6 +39,31 @@ compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
        return length;
 }
 
+static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
+                             char *buf)
+{
+       struct of_device *of;
+       char *compat;
+       int cplen;
+       int length;
+
+       of = &to_macio_device (dev)->ofdev;
+       compat = (char *) get_property (of->node, "compatible", &cplen);
+       if (!compat) compat = "", cplen = 1;
+       length = sprintf (buf, "of:N%sT%s", of->node->name, of->node->type);
+       buf += length;
+       while (cplen > 0) {
+               int l;
+               length += sprintf (buf, "C%s", compat);
+               buf += length;
+               l = strlen (compat) + 1;
+               compat += l;
+               cplen -= l;
+       }
+
+       return length;
+}
+
 macio_config_of_attr (name, "%s\n");
 macio_config_of_attr (type, "%s\n");
 
@@ -46,5 +71,6 @@ struct device_attribute macio_dev_attrs[] = {
        __ATTR_RO(name),
        __ATTR_RO(type),
        __ATTR_RO(compatible),
+       __ATTR_RO(modalias),
        __ATTR_NULL
 };