1 files changed, 115 insertions, 0 deletions

diff --git a/arch/microblaze/kernel/of_device.c b/arch/microblaze/kernel/of_device.c
new file mode 100644
index 000000000000..717edf4ad0b4
--- /dev/null
+++ b/arch/microblaze/kernel/of_device.c
@@ -0,0 +1,115 @@
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/of_device.h>
+
+#include <linux/errno.h>
+
+void of_device_make_bus_id(struct of_device *dev)
+{
+        static atomic_t bus_no_reg_magic;
+        struct device_node *node = dev->node;
+        char *name = dev->dev.bus_id;
+        const u32 *reg;
+        u64 addr;
+        int magic;
+
+        /*
+         * For MMIO, get the physical address
+         */
+        reg = of_get_property(node, "reg", NULL);
+        if (reg) {
+                addr = of_translate_address(node, reg);
+                if (addr != OF_BAD_ADDR) {
+                        snprintf(name, BUS_ID_SIZE,
+                                 "%llx.%s", (unsigned long long)addr,
+                                 node->name);
+                        return;
+                }
+        }
+
+        /*
+         * No BusID, use the node name and add a globally incremented
+         * counter (and pray...)
+         */
+        magic = atomic_add_return(1, &bus_no_reg_magic);
+        snprintf(name, BUS_ID_SIZE, "%s.%d", node->name, magic - 1);
+}
+EXPORT_SYMBOL(of_device_make_bus_id);
+
+struct of_device *of_device_alloc(struct device_node *np,
+                                  const char *bus_id,
+                                  struct device *parent)
+{
+        struct of_device *dev;
+
+        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+        if (!dev)
+                return NULL;
+
+        dev->node = of_node_get(np);
+        dev->dev.dma_mask = &dev->dma_mask;
+        dev->dev.parent = parent;
+        dev->dev.release = of_release_dev;
+        dev->dev.archdata.of_node = np;
+
+        if (bus_id)
+                strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
+        else
+                of_device_make_bus_id(dev);
+
+        return dev;
+}
+EXPORT_SYMBOL(of_device_alloc);
+
+int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+        struct of_device *ofdev;
+        const char *compat;
+        int seen = 0, cplen, sl;
+
+        if (!dev)
+                return -ENODEV;
+
+        ofdev = to_of_device(dev);
+
+        if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name))
+                return -ENOMEM;
+
+        if (add_uevent_var(env, "OF_TYPE=%s", ofdev->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(ofdev->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(ofdev, &env->buf[env->buflen-1],
+                                    sizeof(env->buf) - env->buflen);
+        if (sl >= (sizeof(env->buf) - env->buflen))
+                return -ENOMEM;
+        env->buflen += sl;
+
+        return 0;
+}
+EXPORT_SYMBOL(of_device_uevent);