diff options
Diffstat (limited to 'drivers/of/device.c')
-rw-r--r-- | drivers/of/device.c | 91 |
1 files changed, 70 insertions, 21 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c index 7d18f8e..0d8a064 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -20,13 +20,13 @@ const struct of_device_id *of_match_device(const struct of_device_id *matches, const struct device *dev) { - if (!dev->of_node) + if ((!matches) || (!dev->of_node)) return NULL; return of_match_node(matches, dev->of_node); } EXPORT_SYMBOL(of_match_device); -struct of_device *of_dev_get(struct of_device *dev) +struct platform_device *of_dev_get(struct platform_device *dev) { struct device *tmp; @@ -34,13 +34,13 @@ struct of_device *of_dev_get(struct of_device *dev) return NULL; tmp = get_device(&dev->dev); if (tmp) - return to_of_device(tmp); + return to_platform_device(tmp); else return NULL; } EXPORT_SYMBOL(of_dev_get); -void of_dev_put(struct of_device *dev) +void of_dev_put(struct platform_device *dev) { if (dev) put_device(&dev->dev); @@ -50,28 +50,25 @@ EXPORT_SYMBOL(of_dev_put); static ssize_t devspec_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct of_device *ofdev; + struct platform_device *ofdev; - ofdev = to_of_device(dev); + ofdev = to_platform_device(dev); return sprintf(buf, "%s\n", ofdev->dev.of_node->full_name); } static ssize_t name_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct of_device *ofdev; + struct platform_device *ofdev; - ofdev = to_of_device(dev); + ofdev = to_platform_device(dev); return sprintf(buf, "%s\n", ofdev->dev.of_node->name); } static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct of_device *ofdev = to_of_device(dev); - ssize_t len = 0; - - len = of_device_get_modalias(ofdev, buf, PAGE_SIZE - 2); + ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2); buf[len] = '\n'; buf[len+1] = 0; return len+1; @@ -93,20 +90,25 @@ struct device_attribute of_platform_device_attrs[] = { */ void of_release_dev(struct device *dev) { - struct of_device *ofdev; + struct platform_device *ofdev; - ofdev = to_of_device(dev); + ofdev = to_platform_device(dev); of_node_put(ofdev->dev.of_node); kfree(ofdev); } EXPORT_SYMBOL(of_release_dev); -int of_device_register(struct of_device *ofdev) +int of_device_register(struct platform_device *ofdev) { BUG_ON(ofdev->dev.of_node == NULL); device_initialize(&ofdev->dev); + /* name and id have to be set so that the platform bus doesn't get + * confused on matching */ + ofdev->name = dev_name(&ofdev->dev); + ofdev->id = -1; + /* device_add will assume that this device is on the same node as * the parent. If there is no parent defined, set the node * explicitly */ @@ -117,25 +119,24 @@ int of_device_register(struct of_device *ofdev) } EXPORT_SYMBOL(of_device_register); -void of_device_unregister(struct of_device *ofdev) +void of_device_unregister(struct platform_device *ofdev) { device_unregister(&ofdev->dev); } EXPORT_SYMBOL(of_device_unregister); -ssize_t of_device_get_modalias(struct of_device *ofdev, - char *str, ssize_t len) +ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) { const char *compat; int cplen, i; ssize_t tsize, csize, repend; /* Name & Type */ - csize = snprintf(str, len, "of:N%sT%s", ofdev->dev.of_node->name, - ofdev->dev.of_node->type); + csize = snprintf(str, len, "of:N%sT%s", dev->of_node->name, + dev->of_node->type); /* Get compatible property if any */ - compat = of_get_property(ofdev->dev.of_node, "compatible", &cplen); + compat = of_get_property(dev->of_node, "compatible", &cplen); if (!compat) return csize; @@ -170,3 +171,51 @@ ssize_t of_device_get_modalias(struct of_device *ofdev, return tsize; } + +/** + * of_device_uevent - Display OF related uevent information + */ +int of_device_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + const char *compat; + int seen = 0, cplen, sl; + + if ((!dev) || (!dev->of_node)) + return -ENODEV; + + if (add_uevent_var(env, "OF_NAME=%s", dev->of_node->name)) + return -ENOMEM; + + if (add_uevent_var(env, "OF_TYPE=%s", dev->of_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(dev->of_node, "compatible", &cplen); + while (compat && *compat && cplen > 0) { + if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat)) + return -ENOMEM; + + sl = strlen(compat) + 1; + compat += sl; + cplen -= sl; + seen++; + } + + if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen)) + return -ENOMEM; + + /* modalias is trickier, we add it in 2 steps */ + if (add_uevent_var(env, "MODALIAS=")) + return -ENOMEM; + + sl = of_device_get_modalias(dev, &env->buf[env->buflen-1], + sizeof(env->buf) - env->buflen); + if (sl >= (sizeof(env->buf) - env->buflen)) + return -ENOMEM; + env->buflen += sl; + + return 0; +} |