1 #include <linux/string.h>
2 #include <linux/kernel.h>
4 #include <linux/init.h>
5 #include <linux/module.h>
6 #include <linux/mod_devicetable.h>
7 #include <linux/slab.h>
8 #include <linux/of_device.h>
10 #include <linux/errno.h>
12 void of_device_make_bus_id(struct of_device *dev)
14 static atomic_t bus_no_reg_magic;
15 struct device_node *node = dev->dev.of_node;
21 * For MMIO, get the physical address
23 reg = of_get_property(node, "reg", NULL);
25 addr = of_translate_address(node, reg);
26 if (addr != OF_BAD_ADDR) {
27 dev_set_name(&dev->dev, "%llx.%s",
28 (unsigned long long)addr, node->name);
34 * No BusID, use the node name and add a globally incremented
35 * counter (and pray...)
37 magic = atomic_add_return(1, &bus_no_reg_magic);
38 dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1);
40 EXPORT_SYMBOL(of_device_make_bus_id);
42 struct of_device *of_device_alloc(struct device_node *np,
44 struct device *parent)
46 struct of_device *dev;
48 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
52 dev->dev.of_node = of_node_get(np);
53 dev->dev.dma_mask = &dev->archdata.dma_mask;
54 dev->dev.parent = parent;
55 dev->dev.release = of_release_dev;
58 dev_set_name(&dev->dev, bus_id);
60 of_device_make_bus_id(dev);
64 EXPORT_SYMBOL(of_device_alloc);
66 int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
68 struct of_device *ofdev;
70 int seen = 0, cplen, sl;
75 ofdev = to_of_device(dev);
77 if (add_uevent_var(env, "OF_NAME=%s", ofdev->dev.of_node->name))
80 if (add_uevent_var(env, "OF_TYPE=%s", ofdev->dev.of_node->type))
83 /* Since the compatible field can contain pretty much anything
84 * it's not really legal to split it out with commas. We split it
85 * up using a number of environment variables instead. */
87 compat = of_get_property(ofdev->dev.of_node, "compatible", &cplen);
88 while (compat && *compat && cplen > 0) {
89 if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
92 sl = strlen(compat) + 1;
98 if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
101 /* modalias is trickier, we add it in 2 steps */
102 if (add_uevent_var(env, "MODALIAS="))
104 sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1],
105 sizeof(env->buf) - env->buflen);
106 if (sl >= (sizeof(env->buf) - env->buflen))
112 EXPORT_SYMBOL(of_device_uevent);