of/device: merge of_device_uevent

Merge common code between powerpc and microblaze

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
CC: Michal Simek <monstr@monstr.eu>
CC: Wolfram Sang <w.sang@pengutronix.de>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: microblaze-uclinux@itee.uq.edu.au
CC: linuxppc-dev@ozlabs.org

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/of/device.c b/drivers/of/device.c
index 7d18f8e0b013..275cc9cee14c 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -170,3 +170,51 @@ ssize_t of_device_get_modalias(struct of_device *ofdev,
 
         return tsize;
 }
+
+/**
+ * of_device_uevent - Display OF related uevent information
+ */
+int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+        const char *compat;
+        int seen = 0, cplen, sl;
+
+        if ((!dev) || (!dev->of_node))
+                return -ENODEV;
+
+        if (add_uevent_var(env, "OF_NAME=%s", dev->of_node->name))
+                return -ENOMEM;
+
+        if (add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type))
+                return -ENOMEM;
+
+        /* Since the compatible field can contain pretty much anything
+         * it's not really legal to split it out with commas. We split it
+         * up using a number of environment variables instead. */
+
+        compat = of_get_property(dev->of_node, "compatible", &cplen);
+        while (compat && *compat && cplen > 0) {
+                if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
+                        return -ENOMEM;
+
+                sl = strlen(compat) + 1;
+                compat += sl;
+                cplen -= sl;
+                seen++;
+        }
+
+        if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
+                return -ENOMEM;
+
+        /* modalias is trickier, we add it in 2 steps */
+        if (add_uevent_var(env, "MODALIAS="))
+                return -ENOMEM;
+
+        sl = of_device_get_modalias(to_of_device(dev), &env->buf[env->buflen-1],
+                                    sizeof(env->buf) - env->buflen);
+        if (sl >= (sizeof(env->buf) - env->buflen))
+                return -ENOMEM;
+        env->buflen += sl;
+
+        return 0;
+}