65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/slab.h>
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#include <linux/of_device.h>
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#include <linux/errno.h>
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void of_device_make_bus_id(struct of_device *dev)
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{
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static atomic_t bus_no_reg_magic;
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struct device_node *node = dev->dev.of_node;
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const u32 *reg;
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u64 addr;
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int magic;
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/*
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* For MMIO, get the physical address
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*/
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reg = of_get_property(node, "reg", NULL);
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if (reg) {
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addr = of_translate_address(node, reg);
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if (addr != OF_BAD_ADDR) {
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dev_set_name(&dev->dev, "%llx.%s",
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(unsigned long long)addr, node->name);
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return;
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}
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}
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/*
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* No BusID, use the node name and add a globally incremented
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* counter (and pray...)
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*/
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magic = atomic_add_return(1, &bus_no_reg_magic);
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dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1);
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}
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EXPORT_SYMBOL(of_device_make_bus_id);
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struct of_device *of_device_alloc(struct device_node *np,
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const char *bus_id,
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struct device *parent)
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{
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struct of_device *dev;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return NULL;
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dev->dev.of_node = of_node_get(np);
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dev->dev.dma_mask = &dev->archdata.dma_mask;
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dev->dev.parent = parent;
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dev->dev.release = of_release_dev;
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if (bus_id)
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dev_set_name(&dev->dev, bus_id);
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else
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of_device_make_bus_id(dev);
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return dev;
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}
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EXPORT_SYMBOL(of_device_alloc);
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