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/errno.h>
10 #include <linux/of_device.h>
11 #include <linux/of_platform.h>
13 #include "of_device_common.h"
15 static int node_match(struct device *dev, void *data)
17 struct of_device *op = to_of_device(dev);
18 struct device_node *dp = data;
20 return (op->node == dp);
23 struct of_device *of_find_device_by_node(struct device_node *dp)
25 struct device *dev = bus_find_device(&of_platform_bus_type, NULL,
29 return to_of_device(dev);
33 EXPORT_SYMBOL(of_find_device_by_node);
35 unsigned int irq_of_parse_and_map(struct device_node *node, int index)
37 struct of_device *op = of_find_device_by_node(node);
39 if (!op || index >= op->num_irqs)
42 return op->irqs[index];
44 EXPORT_SYMBOL(irq_of_parse_and_map);
46 /* Take the archdata values for IOMMU, STC, and HOSTDATA found in
47 * BUS and propagate to all child of_device objects.
49 void of_propagate_archdata(struct of_device *bus)
51 struct dev_archdata *bus_sd = &bus->dev.archdata;
52 struct device_node *bus_dp = bus->node;
53 struct device_node *dp;
55 for (dp = bus_dp->child; dp; dp = dp->sibling) {
56 struct of_device *op = of_find_device_by_node(dp);
58 op->dev.archdata.iommu = bus_sd->iommu;
59 op->dev.archdata.stc = bus_sd->stc;
60 op->dev.archdata.host_controller = bus_sd->host_controller;
61 op->dev.archdata.numa_node = bus_sd->numa_node;
64 of_propagate_archdata(op);
68 struct bus_type of_platform_bus_type;
69 EXPORT_SYMBOL(of_platform_bus_type);
71 static void get_cells(struct device_node *dp, int *addrc, int *sizec)
74 *addrc = of_n_addr_cells(dp);
76 *sizec = of_n_size_cells(dp);
80 * Default translator (generic bus)
83 void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
85 get_cells(dev, addrc, sizec);
88 /* Make sure the least significant 64-bits are in-range. Even
89 * for 3 or 4 cell values it is a good enough approximation.
91 int of_out_of_range(const u32 *addr, const u32 *base,
92 const u32 *size, int na, int ns)
94 u64 a = of_read_addr(addr, na);
95 u64 b = of_read_addr(base, na);
100 b += of_read_addr(size, ns);
107 int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
109 u32 result[OF_MAX_ADDR_CELLS];
113 printk("of_device: Cannot handle size cells (%d) > 2.", ns);
117 if (of_out_of_range(addr, range, range + na + pna, na, ns))
120 /* Start with the parent range base. */
121 memcpy(result, range + na, pna * 4);
123 /* Add in the child address offset. */
124 for (i = 0; i < na; i++)
125 result[pna - 1 - i] +=
129 memcpy(addr, result, pna * 4);
134 unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
138 return IORESOURCE_MEM;
142 * SBUS bus specific translator
145 int of_bus_sbus_match(struct device_node *np)
147 struct device_node *dp = np;
150 if (!strcmp(dp->name, "sbus") ||
151 !strcmp(dp->name, "sbi"))
154 /* Have a look at use_1to1_mapping(). We're trying
155 * to match SBUS if that's the top-level bus and we
156 * don't have some intervening real bus that provides
157 * ranges based translations.
159 if (of_find_property(dp, "ranges", NULL) != NULL)
168 void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)