litmus-rt.git - The LITMUS^RT kernel.

diff options

author	Glenn Elliott <gelliott@cs.unc.edu>	2014-02-19 15:46:34 -0500
committer	Glenn Elliott <gelliott@cs.unc.edu>	2014-02-19 15:46:34 -0500
commit	933e053de1efaa3d754899cc03ff1f3eebdc432e (patch)
tree	6c57cf1dbdede346495fb3d6ab51ce40499c57a2 /arch/arm/include/asm/fixmap.h
parent	c973f7f4766dd9194e4c7a52e971e29b224b9720 (diff)
parent	0568a30a1f1895590a35d3487cce7efeaa142989 (diff)

Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-rt into wip-ecrts14-pgmwip-ecrts14-pgm ecrts14-pgm-final ecrts-pgm-final

Conflicts: litmus/sched_cfl_split.c

Diffstat (limited to 'arch/arm/include/asm/fixmap.h')

0 files changed, 0 insertions, 0 deletions

/* * drivers/base/core.c - core driver model code (device registration, etc) * * Copyright (c) 2002-3 Patrick Mochel * Copyright (c) 2002-3 Open Source Development Labs * * This file is released under the GPLv2 * */ #include <linux/config.h> #include <linux/device.h> #include <linux/err.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/string.h> #include <asm/semaphore.h> #include "base.h" #include "power/power.h" int (*platform_notify)(struct device * dev) = NULL; int (*platform_notify_remove)(struct device * dev) = NULL; /* * sysfs bindings for devices. */ #define to_dev(obj) container_of(obj, struct device, kobj) #define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr) static ssize_t dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf) { struct device_attribute * dev_attr = to_dev_attr(attr); struct device * dev = to_dev(kobj); ssize_t ret = -EIO; if (dev_attr->show) ret = dev_attr->show(dev, buf); return ret; } static ssize_t dev_attr_store(struct kobject * kobj, struct attribute * attr, const char * buf, size_t count) { struct device_attribute * dev_attr = to_dev_attr(attr); struct device * dev = to_dev(kobj); ssize_t ret = -EIO; if (dev_attr->store) ret = dev_attr->store(dev, buf, count); return ret; } static struct sysfs_ops dev_sysfs_ops = { .show = dev_attr_show, .store = dev_attr_store, }; /** * device_release - free device structure. * @kobj: device's kobject. * * This is called once the reference count for the object * reaches 0. We forward the call to the device's release * method, which should handle actually freeing the structure. */ static void device_release(struct kobject * kobj) { struct device * dev = to_dev(kobj); if (dev->release) dev->release(dev); else { printk(KERN_ERR "Device '%s' does not have a release() function, " "it is broken and must be fixed.\n", dev->bus_id); WARN_ON(1); } } static struct kobj_type ktype_device = { .release = device_release, .sysfs_ops = &dev_sysfs_ops, }; static int dev_hotplug_filter(struct kset *kset, struct kobject *kobj) { struct kobj_type *ktype = get_ktype(kobj); if (ktype == &ktype_device) { struct device *dev = to_dev(kobj); if (dev->bus) return 1; } return 0; } static const char *dev_hotplug_name(struct kset *kset, struct kobject *kobj) { struct device *dev = to_dev(kobj); return dev->bus->name; } static int dev_hotplug(struct kset *kset, struct kobject *kobj, char **envp, int num_envp, char *buffer, int buffer_size) { struct device *dev = to_dev(kobj); int i = 0; int length = 0; int retval = 0; /* add bus name of physical device */ if (dev->bus) add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, &length, "PHYSDEVBUS=%s", dev->bus->name); /* add driver name of physical device */ if (dev->driver) add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, &length, "PHYSDEVDRIVER=%s", dev->driver->name); /* terminate, set to next free slot, shrink available space */ envp[i] = NULL; envp = &envp[i]; num_envp -= i; buffer = &buffer[length]; buffer_size -= length; if (dev->bus && dev->bus->hotplug) { /* have the bus specific function add its stuff */ retval = dev->bus->hotplug (dev, envp, num_envp, buffer, buffer_size); if (retval) { pr_debug ("%s - hotplug() returned %d\n", __FUNCTION__, retval); } } return retval; } static struct kset_hotplug_ops device_hotplug_ops = { .filter = dev_hotplug_filter, .name = dev_hotplug_name, .hotplug = dev_hotplug, }; /** * device_subsys - structure to be registered with kobject core. */ decl_subsys(devices, &ktype_device, &device_hotplug_ops); /** * device_create_file - create sysfs attribute file for device. * @dev: device. * @attr: device attribute descriptor. */ int device_create_file(struct device * dev, struct device_attribute * attr) { int error = 0; if (get_device(dev)) { error = sysfs_create_file(&dev->kobj, &attr->attr); put_device(dev); } return error; } /** * device_remove_file - remove sysfs attribute file. * @dev: device. * @attr: device attribute descriptor. */ void device_remove_file(struct device * dev, struct device_attribute * attr) { if (get_device(dev)) { sysfs_remove_file(&dev->kobj, &attr->attr); put_device(dev); } } /** * device_initialize - init device structure. * @dev: device. * * This prepares the device for use by other layers, * including adding it to the device hierarchy. * It is the first half of device_register(), if called by * that, though it can also be called separately, so one * may use @dev's fields (e.g. the refcount). */ void device_initialize(struct device *dev) { kobj_set_kset_s(dev, devices_subsys); kobject_init(&dev->kobj); INIT_LIST_HEAD(&dev->node); INIT_LIST_HEAD(&dev->children); INIT_LIST_HEAD(&dev->driver_list); INIT_LIST_HEAD(&dev->bus_list); INIT_LIST_HEAD(&dev->dma_pools); } /** * device_add - add device to device hierarchy. * @dev: device. * * This is part 2 of device_register(), though may be called * separately _iff_ device_initialize() has been called separately. * * This adds it to the kobject hierarchy via kobject_add(), adds it * to the global and sibling lists for the device, then * adds it to the other relevant subsystems of the driver model. */ int device_add(struct device *dev) { struct device *parent = NULL; int error = -EINVAL; dev = get_device(dev); if (!dev || !strlen(dev->bus_id)) goto Error; parent = get_device(dev->parent); pr_debug("DEV: registering device: ID = '%s'\n", dev->bus_id); /* first, register with generic layer. */ kobject_set_name(&dev->kobj, "%s", dev->bus_id); if (parent) dev->kobj.parent = &parent->kobj; if ((error = kobject_add(&dev->kobj))) goto Error; kobject_hotplug(&dev->kobj, KOBJ_ADD); if ((error = device_pm_add(dev))) goto PMError; if ((error = bus_add_device(dev))) goto BusError; down_write(&devices_subsys.rwsem); if (parent) list_add_tail(&dev->node, &parent->children); up_write(&devices_subsys.rwsem); /* notify platform of device entry */ if (platform_notify) platform_notify(dev); Done: put_device(dev); return error; BusError: device_pm_remove(dev); PMError: kobject_hotplug(&dev->kobj, KOBJ_REMOVE); kobject_del(&dev->kobj); Error: if (parent) put_device(parent); goto Done; } /** * device_register - register a device with the system. * @dev: pointer to the device structure * * This happens in two clean steps - initialize the device * and add it to the system. The two steps can be called * separately, but this is the easiest and most common. * I.e. you should only call the two helpers separately if * have a clearly defined need to use and refcount the device * before it is added to the hierarchy. */ int device_register(struct device *dev) { device_initialize(dev); return device_add(dev); } /** * get_device - increment reference count for device. * @dev: device. * * This simply forwards the call to kobject_get(), though * we do take care to provide for the case that we get a NULL * pointer passed in. */ struct device * get_device(struct device * dev) { return dev ? to_dev(kobject_get(&dev->kobj)) : NULL; } /** * put_device - decrement reference count. * @dev: device in question. */ void put_device(struct device * dev) { if (dev) kobject_put(&dev->kobj); } /** * device_del - delete device from system. * @dev: device. * * This is the first part of the device unregistration * sequence. This removes the device from the lists we control * from here, has it removed from the other driver model * subsystems it was added to in device_add(), and removes it * from the kobject hierarchy. * * NOTE: this should be called manually _iff_ device_add() was * also called manually. */ void device_del(struct device * dev) { struct device * parent = dev->parent; down_write(&devices_subsys.rwsem); if (parent) list_del_init(&dev->node); up_write(&devices_subsys.rwsem); /* Notify the platform of the removal, in case they * need to do anything... */ if (platform_notify_remove) platform_notify_remove(dev); bus_remove_device(dev); device_pm_remove(dev); kobject_hotplug(&dev->kobj, KOBJ_REMOVE); kobject_del(&dev->kobj); if (parent) put_device(parent); } /** * device_unregister - unregister device from system. * @dev: device going away. * * We do this in two parts, like we do device_register(). First, * we remove it from all the subsystems with device_del(), then * we decrement the reference count via put_device(). If that * is the final reference count, the device will be cleaned up * via device_release() above. Otherwise, the structure will * stick around until the final reference to the device is dropped. */ void device_unregister(struct device * dev) { pr_debug("DEV: Unregistering device. ID = '%s'\n", dev->bus_id); device_del(dev); put_device(dev); } /** * device_for_each_child - device child iterator. * @dev: parent struct device. * @data: data for the callback. * @fn: function to be called for each device. * * Iterate over @dev's child devices, and call @fn for each, * passing it @data. *


context:
space:
mode: