diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/ibmebus.c | 100 |
1 files changed, 82 insertions, 18 deletions
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c index af21306e2ef..d21658140b6 100644 --- a/arch/powerpc/kernel/ibmebus.c +++ b/arch/powerpc/kernel/ibmebus.c @@ -51,6 +51,13 @@ static struct device ibmebus_bus_device = { /* fake "parent" device */ struct bus_type ibmebus_bus_type; +/* These devices will automatically be added to the bus during init */ +static struct of_device_id builtin_matches[] = { + { .compatible = "IBM,lhca" }, + { .compatible = "IBM,lhea" }, + {}, +}; + static void *ibmebus_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, @@ -125,6 +132,67 @@ static struct dma_mapping_ops ibmebus_dma_ops = { .dma_supported = ibmebus_dma_supported, }; +static int ibmebus_match_path(struct device *dev, void *data) +{ + struct device_node *dn = to_of_device(dev)->node; + return (dn->full_name && + (strcasecmp((char *)data, dn->full_name) == 0)); +} + +static int ibmebus_match_node(struct device *dev, void *data) +{ + return to_of_device(dev)->node == data; +} + +static int ibmebus_create_device(struct device_node *dn) +{ + struct of_device *dev; + int ret; + + dev = of_device_alloc(dn, NULL, &ibmebus_bus_device); + if (!dev) + return -ENOMEM; + + dev->dev.bus = &ibmebus_bus_type; + dev->dev.archdata.dma_ops = &ibmebus_dma_ops; + + ret = of_device_register(dev); + if (ret) { + of_device_free(dev); + return ret; + } + + return 0; +} + +static int ibmebus_create_devices(const struct of_device_id *matches) +{ + struct device_node *root, *child; + int ret = 0; + + root = of_find_node_by_path("/"); + + for (child = NULL; (child = of_get_next_child(root, child)); ) { + if (!of_match_node(matches, child)) + continue; + + if (bus_find_device(&ibmebus_bus_type, NULL, child, + ibmebus_match_node)) + continue; + + ret = ibmebus_create_device(child); + if (ret) { + printk(KERN_ERR "%s: failed to create device (%i)", + __FUNCTION__, ret); + of_node_put(child); + break; + } + } + + of_node_put(root); + return ret; +} + int ibmebus_register_driver(struct ibmebus_driver *drv) { return 0; @@ -173,18 +241,6 @@ static struct device_attribute ibmebus_dev_attrs[] = { __ATTR_NULL }; -static int ibmebus_match_path(struct device *dev, void *data) -{ - int rc; - struct device_node *dn = - of_node_get(to_ibmebus_dev(dev)->ofdev.node); - - rc = (dn->full_name && (strcasecmp((char*)data, dn->full_name) == 0)); - - of_node_put(dn); - return rc; -} - static char *ibmebus_chomp(const char *in, size_t count) { char *out = kmalloc(count + 1, GFP_KERNEL); @@ -204,9 +260,8 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus, const char *buf, size_t count) { struct device_node *dn = NULL; - struct ibmebus_dev *dev; char *path; - ssize_t rc; + ssize_t rc = 0; path = ibmebus_chomp(buf, count); if (!path) @@ -221,9 +276,8 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus, } if ((dn = of_find_node_by_path(path))) { -/* dev = ibmebus_register_device_node(dn); */ + rc = ibmebus_create_device(dn); of_node_put(dn); - rc = IS_ERR(dev) ? PTR_ERR(dev) : count; } else { printk(KERN_WARNING "%s: no such device node: %s\n", __FUNCTION__, path); @@ -232,7 +286,9 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus, out: kfree(path); - return rc; + if (rc) + return rc; + return count; } static ssize_t ibmebus_store_remove(struct bus_type *bus, @@ -247,7 +303,7 @@ static ssize_t ibmebus_store_remove(struct bus_type *bus, if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, ibmebus_match_path))) { -/* ibmebus_unregister_device(dev); */ + of_device_unregister(to_of_device(dev)); kfree(path); return count; @@ -267,6 +323,7 @@ static struct bus_attribute ibmebus_bus_attrs[] = { }; struct bus_type ibmebus_bus_type = { + .uevent = of_device_uevent, .dev_attrs = ibmebus_dev_attrs, .bus_attrs = ibmebus_bus_attrs }; @@ -294,6 +351,13 @@ static int __init ibmebus_bus_init(void) return err; } + err = ibmebus_create_devices(builtin_matches); + if (err) { + device_unregister(&ibmebus_bus_device); + bus_unregister(&ibmebus_bus_type); + return err; + } + return 0; } postcore_initcall(ibmebus_bus_init); |