#include <asm/of_device.h>
/**
- * of_match_device - Tell if an of_device structure has a matching
- * of_match structure
+ * of_match_node - Tell if an device_node has a matching of_match structure
* @ids: array of of device match structures to search in
- * @dev: the of device structure to match against
+ * @node: 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.
+ * Low level utility function used by device matching.
*/
-const struct of_device_id *of_match_device(const struct of_device_id *matches,
- const struct of_device *dev)
+const struct of_device_id *of_match_node(const struct of_device_id *matches,
+ const struct device_node *node)
{
- if (!dev->node)
- return NULL;
while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
int match = 1;
if (matches->name[0])
- match &= dev->node->name
- && !strcmp(matches->name, dev->node->name);
+ match &= node->name
+ && !strcmp(matches->name, node->name);
if (matches->type[0])
- match &= dev->node->type
- && !strcmp(matches->type, dev->node->type);
+ match &= node->type
+ && !strcmp(matches->type, node->type);
if (matches->compatible[0])
- match &= device_is_compatible(dev->node,
- matches->compatible);
+ match &= device_is_compatible(node,
+ matches->compatible);
if (match)
return matches;
matches++;
return NULL;
}
-static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
+/**
+ * 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)
{
- struct of_device * of_dev = to_of_device(dev);
- struct of_platform_driver * of_drv = to_of_platform_driver(drv);
- const struct of_device_id * matches = of_drv->match_table;
-
- if (!matches)
- return 0;
-
- return of_match_device(matches, of_dev) != NULL;
+ if (!dev->node)
+ return NULL;
+ return of_match_node(matches, dev->node);
}
struct of_device *of_dev_get(struct of_device *dev)
put_device(&dev->dev);
}
-
-static int of_device_probe(struct device *dev)
-{
- int error = -ENODEV;
- struct of_platform_driver *drv;
- struct of_device *of_dev;
- const struct of_device_id *match;
-
- drv = to_of_platform_driver(dev->driver);
- of_dev = to_of_device(dev);
-
- if (!drv->probe)
- return error;
-
- of_dev_get(of_dev);
-
- match = of_match_device(drv->match_table, of_dev);
- if (match)
- error = drv->probe(of_dev, match);
- if (error)
- of_dev_put(of_dev);
-
- return error;
-}
-
-static int of_device_remove(struct device *dev)
-{
- struct of_device * of_dev = to_of_device(dev);
- struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
-
- if (dev->driver && drv->remove)
- drv->remove(of_dev);
- return 0;
-}
-
-static int of_device_suspend(struct device *dev, pm_message_t state)
-{
- struct of_device * of_dev = to_of_device(dev);
- struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
- int error = 0;
-
- if (dev->driver && drv->suspend)
- error = drv->suspend(of_dev, state);
- return error;
-}
-
-static int of_device_resume(struct device * dev)
-{
- struct of_device * of_dev = to_of_device(dev);
- struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
- int error = 0;
-
- if (dev->driver && drv->resume)
- error = drv->resume(of_dev);
- return error;
-}
-
-struct bus_type of_platform_bus_type = {
- .name = "of_platform",
- .match = of_platform_bus_match,
- .probe = of_device_probe,
- .remove = of_device_remove,
- .suspend = of_device_suspend,
- .resume = of_device_resume,
-};
-
-static int __init of_bus_driver_init(void)
-{
- return bus_register(&of_platform_bus_type);
-}
-
-postcore_initcall(of_bus_driver_init);
-
-int of_register_driver(struct of_platform_driver *drv)
-{
- /* initialize common driver fields */
- drv->driver.name = drv->name;
- drv->driver.bus = &of_platform_bus_type;
-
- /* register with core */
- return driver_register(&drv->driver);
-}
-
-void of_unregister_driver(struct of_platform_driver *drv)
-{
- driver_unregister(&drv->driver);
-}
-
-
-static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t dev_show_devspec(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct of_device *ofdev;
if (rc)
return rc;
- device_create_file(&ofdev->dev, &dev_attr_devspec);
-
- return 0;
+ return device_create_file(&ofdev->dev, &dev_attr_devspec);
}
void of_device_unregister(struct of_device *ofdev)
device_unregister(&ofdev->dev);
}
-struct of_device* of_platform_device_create(struct device_node *np,
- const char *bus_id,
- struct device *parent)
+
+static ssize_t of_device_get_modalias(struct of_device *ofdev,
+ char *str, ssize_t len)
{
- struct of_device *dev;
+ const char *compat;
+ int cplen, i;
+ ssize_t tsize, csize, repend;
- dev = kmalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return NULL;
- memset(dev, 0, sizeof(*dev));
+ /* Name & Type */
+ csize = snprintf(str, len, "of:N%sT%s",
+ ofdev->node->name, ofdev->node->type);
- dev->node = of_node_get(np);
- dev->dma_mask = 0xffffffffUL;
- dev->dev.dma_mask = &dev->dma_mask;
- dev->dev.parent = parent;
- dev->dev.bus = &of_platform_bus_type;
- dev->dev.release = of_release_dev;
+ /* Get compatible property if any */
+ compat = of_get_property(ofdev->node, "compatible", &cplen);
+ if (!compat)
+ return csize;
- strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
+ /* Find true end (we tolerate multiple \0 at the end */
+ for (i=(cplen-1); i>=0 && !compat[i]; i--)
+ cplen--;
+ if (!cplen)
+ return csize;
+ cplen++;
- if (of_device_register(dev) != 0) {
- kfree(dev);
- return NULL;
+ /* Check space (need cplen+1 chars including final \0) */
+ tsize = csize + cplen;
+ repend = tsize;
+
+ if (csize>=len) /* @ the limit, all is already filled */
+ return tsize;
+
+ if (tsize>=len) { /* limit compat list */
+ cplen = len-csize-1;
+ repend = len;
+ }
+
+ /* Copy and do char replacement */
+ memcpy(&str[csize+1], compat, cplen);
+ for (i=csize; i<repend; i++) {
+ char c = str[i];
+ if (c=='\0')
+ str[i] = 'C';
+ else if (c==' ')
+ str[i] = '_';
}
- return dev;
+ return tsize;
}
+int of_device_uevent(struct device *dev,
+ char **envp, int num_envp, char *buffer, int buffer_size)
+{
+ struct of_device *ofdev;
+ const char *compat;
+ int i = 0, length = 0, seen = 0, cplen, sl;
+
+ if (!dev)
+ return -ENODEV;
+
+ ofdev = to_of_device(dev);
+
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "OF_NAME=%s", ofdev->node->name))
+ return -ENOMEM;
+
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "OF_TYPE=%s", ofdev->node->type))
+ return -ENOMEM;
+
+ /* 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. */
+
+ compat = of_get_property(ofdev->node, "compatible", &cplen);
+ while (compat && *compat && cplen > 0) {
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "OF_COMPATIBLE_%d=%s", seen, compat))
+ return -ENOMEM;
+
+ sl = strlen (compat) + 1;
+ compat += sl;
+ cplen -= sl;
+ seen++;
+ }
+
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "OF_COMPATIBLE_N=%d", seen))
+ return -ENOMEM;
+
+ /* modalias is trickier, we add it in 2 steps */
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "MODALIAS="))
+ return -ENOMEM;
+
+ sl = of_device_get_modalias(ofdev, &buffer[length-1],
+ buffer_size-length);
+ if (sl >= (buffer_size-length))
+ return -ENOMEM;
+
+ length += sl;
+
+ envp[i] = NULL;
+
+ return 0;
+}
+
+
+EXPORT_SYMBOL(of_match_node);
EXPORT_SYMBOL(of_match_device);
-EXPORT_SYMBOL(of_platform_bus_type);
-EXPORT_SYMBOL(of_register_driver);
-EXPORT_SYMBOL(of_unregister_driver);
EXPORT_SYMBOL(of_device_register);
EXPORT_SYMBOL(of_device_unregister);
EXPORT_SYMBOL(of_dev_get);
EXPORT_SYMBOL(of_dev_put);
-EXPORT_SYMBOL(of_platform_device_create);
EXPORT_SYMBOL(of_release_dev);
+EXPORT_SYMBOL(of_device_uevent);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff