#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 <asm/errno.h>
-#include <asm/of_device.h>
-
-/**
- * of_match_node - Tell if an device_node has a matching of_match structure
- * @ids: array of of device match structures to search in
- * @node: the of device structure to match against
- *
- * Low level utility function used by device matching.
- */
-const struct of_device_id *of_match_node(const struct of_device_id *matches,
- const struct device_node *node)
+#include <asm/dcr.h>
+
+static void of_device_make_bus_id(struct of_device *dev)
{
- while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
- int match = 1;
- if (matches->name[0])
- match &= node->name
- && !strcmp(matches->name, node->name);
- if (matches->type[0])
- match &= node->type
- && !strcmp(matches->type, node->type);
- if (matches->compatible[0])
- match &= device_is_compatible(node,
- matches->compatible);
- if (match)
- return matches;
- matches++;
+ 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;
+
+ /*
+ * If it's a DCR based device, use 'd' for native DCRs
+ * and 'D' for MMIO DCRs.
+ */
+#ifdef CONFIG_PPC_DCR
+ reg = of_get_property(node, "dcr-reg", NULL);
+ if (reg) {
+#ifdef CONFIG_PPC_DCR_NATIVE
+ snprintf(name, BUS_ID_SIZE, "d%x.%s",
+ *reg, node->name);
+#else /* CONFIG_PPC_DCR_NATIVE */
+ addr = of_translate_dcr_address(node, *reg, NULL);
+ if (addr != OF_BAD_ADDR) {
+ snprintf(name, BUS_ID_SIZE,
+ "D%llx.%s", (unsigned long long)addr,
+ node->name);
+ return;
+ }
+#endif /* !CONFIG_PPC_DCR_NATIVE */
+ }
+#endif /* CONFIG_PPC_DCR */
+
+ /*
+ * 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;
+ }
}
- return NULL;
-}
-/**
- * of_match_device - Tell if an of_device structure has a matching
- * of_match structure
- * @ids: array of of device match structures to search in
- * @dev: the of device structure to match against
- *
- * Used by a driver to check whether an of_device present in the
- * system is in its list of supported devices.
- */
-const struct of_device_id *of_match_device(const struct of_device_id *matches,
- const struct of_device *dev)
-{
- if (!dev->node)
- return NULL;
- return of_match_node(matches, dev->node);
+ /*
+ * 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);
}
-struct of_device *of_dev_get(struct of_device *dev)
+struct of_device *of_device_alloc(struct device_node *np,
+ const char *bus_id,
+ struct device *parent)
{
- struct device *tmp;
+ struct of_device *dev;
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
- tmp = get_device(&dev->dev);
- if (tmp)
- return to_of_device(tmp);
+
+ 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;
+ dev->dev.archdata.numa_node = of_node_to_nid(np);
+
+ if (bus_id)
+ strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
else
- return NULL;
-}
+ of_device_make_bus_id(dev);
-void of_dev_put(struct of_device *dev)
-{
- if (dev)
- put_device(&dev->dev);
+ return dev;
}
+EXPORT_SYMBOL(of_device_alloc);
-static ssize_t dev_show_devspec(struct device *dev,
- struct device_attribute *attr, char *buf)
+int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct of_device *ofdev;
+ const char *compat;
+ int seen = 0, cplen, sl;
- ofdev = to_of_device(dev);
- return sprintf(buf, "%s", ofdev->node->full_name);
-}
+ if (!dev)
+ return -ENODEV;
-static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
+ ofdev = to_of_device(dev);
-/**
- * of_release_dev - free an of device structure when all users of it are finished.
- * @dev: device that's been disconnected
- *
- * Will be called only by the device core when all users of this of device are
- * done.
- */
-void of_release_dev(struct device *dev)
-{
- struct of_device *ofdev;
+ if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name))
+ return -ENOMEM;
- ofdev = to_of_device(dev);
- of_node_put(ofdev->node);
- kfree(ofdev);
-}
+ if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type))
+ return -ENOMEM;
-int of_device_register(struct of_device *ofdev)
-{
- int rc;
+ /* 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. */
- BUG_ON(ofdev->node == NULL);
+ 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;
- rc = device_register(&ofdev->dev);
- if (rc)
- return rc;
+ sl = strlen (compat) + 1;
+ compat += sl;
+ cplen -= sl;
+ seen++;
+ }
- return device_create_file(&ofdev->dev, &dev_attr_devspec);
-}
+ if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
+ return -ENOMEM;
-void of_device_unregister(struct of_device *ofdev)
-{
- device_remove_file(&ofdev->dev, &dev_attr_devspec);
+ /* 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;
- device_unregister(&ofdev->dev);
+ return 0;
}
-
-
-EXPORT_SYMBOL(of_match_node);
-EXPORT_SYMBOL(of_match_device);
-EXPORT_SYMBOL(of_device_register);
-EXPORT_SYMBOL(of_device_unregister);
-EXPORT_SYMBOL(of_dev_get);
-EXPORT_SYMBOL(of_dev_put);
-EXPORT_SYMBOL(of_release_dev);
+EXPORT_SYMBOL(of_device_uevent);
+EXPORT_SYMBOL(of_device_get_modalias);
projects / linux-2.6-omap-h63xx.git / blobdiff