diff options
| -rw-r--r-- | drivers/bus/vexpress-config.c | 118 |
1 files changed, 21 insertions, 97 deletions
diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c index 43f5beac9811..43deb4df140b 100644 --- a/drivers/bus/vexpress-config.c +++ b/drivers/bus/vexpress-config.c @@ -56,7 +56,6 @@ struct vexpress_config_bridge { static DEFINE_MUTEX(vexpress_config_mutex); -static struct class *vexpress_config_class; static u32 vexpress_config_site_master = VEXPRESS_SITE_MASTER; @@ -121,9 +120,6 @@ struct regmap *devm_regmap_init_vexpress_config(struct device *dev) struct regmap *regmap; struct regmap **res; - if (WARN_ON(dev->parent->class != vexpress_config_class)) - return ERR_PTR(-ENODEV); - bridge = dev_get_drvdata(dev->parent); if (WARN_ON(!bridge)) return ERR_PTR(-EINVAL); @@ -146,94 +142,6 @@ struct regmap *devm_regmap_init_vexpress_config(struct device *dev) } EXPORT_SYMBOL_GPL(devm_regmap_init_vexpress_config); -static struct device *vexpress_config_bridge_register(struct device *parent, - struct vexpress_config_bridge_ops *ops, void *context) -{ - struct device *dev; - struct vexpress_config_bridge *bridge; - - if (!vexpress_config_class) { - vexpress_config_class = class_create(THIS_MODULE, - "vexpress-config"); - if (IS_ERR(vexpress_config_class)) - return (void *)vexpress_config_class; - } - - dev = device_create(vexpress_config_class, parent, 0, - NULL, "%s.bridge", dev_name(parent)); - - if (IS_ERR(dev)) - return dev; - - bridge = devm_kmalloc(dev, sizeof(*bridge), GFP_KERNEL); - if (!bridge) { - put_device(dev); - device_unregister(dev); - return ERR_PTR(-ENOMEM); - } - bridge->ops = ops; - bridge->context = context; - - dev_set_drvdata(dev, bridge); - - dev_dbg(parent, "Registered bridge '%s', parent node %p\n", - dev_name(dev), parent->of_node); - - return dev; -} - - -static int vexpress_config_node_match(struct device *dev, const void *data) -{ - const struct device_node *node = data; - - dev_dbg(dev, "Parent node %p, looking for %p\n", - dev->parent->of_node, node); - - return dev->parent->of_node == node; -} - -static int vexpress_config_populate(struct device_node *node) -{ - struct device_node *bridge; - struct device *parent; - int ret; - - bridge = of_parse_phandle(node, "arm,vexpress,config-bridge", 0); - if (!bridge) - return -EINVAL; - - parent = class_find_device(vexpress_config_class, NULL, bridge, - vexpress_config_node_match); - of_node_put(bridge); - if (WARN_ON(!parent)) - return -ENODEV; - - ret = of_platform_populate(node, NULL, NULL, parent); - - put_device(parent); - - return ret; -} - -static int __init vexpress_config_init(void) -{ - int err = 0; - struct device_node *node; - - /* Need the config devices early, before the "normal" devices... */ - for_each_compatible_node(node, NULL, "arm,vexpress,config-bus") { - err = vexpress_config_populate(node); - if (err) { - of_node_put(node); - break; - } - } - - return err; -} -postcore_initcall(vexpress_config_init); - static int vexpress_syscfg_exec(struct vexpress_syscfg_func *func, int index, bool write, u32 *data) { @@ -430,7 +338,8 @@ static int vexpress_syscfg_probe(struct platform_device *pdev) { struct vexpress_syscfg *syscfg; struct resource *res; - struct device *bridge; + struct vexpress_config_bridge *bridge; + struct device_node *node; syscfg = devm_kzalloc(&pdev->dev, sizeof(*syscfg), GFP_KERNEL); if (!syscfg) @@ -443,11 +352,26 @@ static int vexpress_syscfg_probe(struct platform_device *pdev) if (IS_ERR(syscfg->base)) return PTR_ERR(syscfg->base); - /* Must use dev.parent (MFD), as that's where DT phandle points at... */ - bridge = vexpress_config_bridge_register(pdev->dev.parent, - &vexpress_syscfg_bridge_ops, syscfg); + bridge = devm_kmalloc(&pdev->dev, sizeof(*bridge), GFP_KERNEL); + if (!bridge) + return -ENOMEM; + + bridge->ops = &vexpress_syscfg_bridge_ops; + bridge->context = syscfg; + + dev_set_drvdata(&pdev->dev, bridge); - return PTR_ERR_OR_ZERO(bridge); + for_each_compatible_node(node, NULL, "arm,vexpress,config-bus") { + struct device_node *bridge_np; + + bridge_np = of_parse_phandle(node, "arm,vexpress,config-bridge", 0); + if (bridge_np != pdev->dev.parent->of_node) + continue; + + of_platform_populate(node, NULL, NULL, &pdev->dev); + } + + return 0; } static const struct platform_device_id vexpress_syscfg_id_table[] = { |