Merge branch 'linus' into x86/urgent
[linux-2.6] / arch / microblaze / kernel / of_device.c
1 #include <linux/string.h>
2 #include <linux/kernel.h>
3 #include <linux/of.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>
9
10 #include <linux/errno.h>
11
12 void of_device_make_bus_id(struct of_device *dev)
13 {
14         static atomic_t bus_no_reg_magic;
15         struct device_node *node = dev->node;
16         const u32 *reg;
17         u64 addr;
18         int magic;
19
20         /*
21          * For MMIO, get the physical address
22          */
23         reg = of_get_property(node, "reg", NULL);
24         if (reg) {
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);
29                         return;
30                 }
31         }
32
33         /*
34          * No BusID, use the node name and add a globally incremented
35          * counter (and pray...)
36          */
37         magic = atomic_add_return(1, &bus_no_reg_magic);
38         dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1);
39 }
40 EXPORT_SYMBOL(of_device_make_bus_id);
41
42 struct of_device *of_device_alloc(struct device_node *np,
43                                   const char *bus_id,
44                                   struct device *parent)
45 {
46         struct of_device *dev;
47
48         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
49         if (!dev)
50                 return NULL;
51
52         dev->node = of_node_get(np);
53         dev->dev.dma_mask = &dev->dma_mask;
54         dev->dev.parent = parent;
55         dev->dev.release = of_release_dev;
56         dev->dev.archdata.of_node = np;
57
58         if (bus_id)
59                 dev_set_name(&dev->dev, bus_id);
60         else
61                 of_device_make_bus_id(dev);
62
63         return dev;
64 }
65 EXPORT_SYMBOL(of_device_alloc);
66
67 int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
68 {
69         struct of_device *ofdev;
70         const char *compat;
71         int seen = 0, cplen, sl;
72
73         if (!dev)
74                 return -ENODEV;
75
76         ofdev = to_of_device(dev);
77
78         if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name))
79                 return -ENOMEM;
80
81         if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type))
82                 return -ENOMEM;
83
84         /* Since the compatible field can contain pretty much anything
85          * it's not really legal to split it out with commas. We split it
86          * up using a number of environment variables instead. */
87
88         compat = of_get_property(ofdev->node, "compatible", &cplen);
89         while (compat && *compat && cplen > 0) {
90                 if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
91                         return -ENOMEM;
92
93                 sl = strlen(compat) + 1;
94                 compat += sl;
95                 cplen -= sl;
96                 seen++;
97         }
98
99         if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
100                 return -ENOMEM;
101
102         /* modalias is trickier, we add it in 2 steps */
103         if (add_uevent_var(env, "MODALIAS="))
104                 return -ENOMEM;
105         sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1],
106                                     sizeof(env->buf) - env->buflen);
107         if (sl >= (sizeof(env->buf) - env->buflen))
108                 return -ENOMEM;
109         env->buflen += sl;
110
111         return 0;
112 }
113 EXPORT_SYMBOL(of_device_uevent);