/* * soundbus * * Copyright 2006 Johannes Berg * * GPL v2, can be found in COPYING. */ #include #include "soundbus.h" MODULE_AUTHOR("Johannes Berg "); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Apple Soundbus"); struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev) { struct device *tmp; if (!dev) return NULL; tmp = get_device(&dev->ofdev.dev); if (tmp) return to_soundbus_device(tmp); else return NULL; } EXPORT_SYMBOL_GPL(soundbus_dev_get); void soundbus_dev_put(struct soundbus_dev *dev) { if (dev) put_device(&dev->ofdev.dev); } EXPORT_SYMBOL_GPL(soundbus_dev_put); static int soundbus_probe(struct device *dev) { int error = -ENODEV; struct soundbus_driver *drv; struct soundbus_dev *soundbus_dev; drv = to_soundbus_driver(dev->driver); soundbus_dev = to_soundbus_device(dev); if (!drv->probe) return error; soundbus_dev_get(soundbus_dev); error = drv->probe(soundbus_dev); if (error) soundbus_dev_put(soundbus_dev); return error; } static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env) { struct soundbus_dev * soundbus_dev; struct platform_device * of; const char *compat; int retval = 0; int cplen, seen = 0; if (!dev) return -ENODEV; soundbus_dev = to_soundbus_device(dev); if (!soundbus_dev) return -ENODEV; of = &soundbus_dev->ofdev; /* stuff we want to pass to /sbin/hotplug */ retval = add_uevent_var(env, "OF_NAME=%s", of->dev.of_node->name); if (retval) return retval; retval = add_uevent_var(env, "OF_TYPE=%s", of->dev.of_node->type); if (retval) return retval; /* 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(of->dev.of_node, "compatible", &cplen); while (compat && cplen > 0) { int tmp = env->buflen; retval = add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat); if (retval) return retval; compat += env->buflen - tmp; cplen -= env->buflen - tmp; seen += 1; } retval = add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen); if (retval) return retval; retval = add_uevent_var(env, "MODALIAS=%s", soundbus_dev->modalias); return retval; } static int soundbus_device_remove(struct device *dev) { struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); struct soundbus_driver * drv = to_soundbus_driver(dev->driver); if (dev->driver && drv->remove) drv->remove(soundbus_dev); soundbus_dev_put(soundbus_dev); return 0; } static void soundbus_device_shutdown(struct device *dev) { struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); struct soundbus_driver * drv = to_soundbus_driver(dev->driver); if (dev->driver && drv->shutdown) drv->shutdown(soundbus_dev); } /* soundbus_dev_attrs is declared in sysfs.c */ ATTRIBUTE_GROUPS(soundbus_dev); static struct bus_type soundbus_bus_type = { .name = "aoa-soundbus", .probe = soundbus_probe, .uevent = soundbus_uevent, .remove = soundbus_device_remove, .shutdown = soundbus_device_shutdown, .dev_groups = soundbus_dev_groups, }; int soundbus_add_one(struct soundbus_dev *dev) { static int devcount; /* sanity checks */ if (!dev->attach_codec || !dev->ofdev.dev.of_node || dev->pcmname || dev->pcmid != -1) { printk(KERN_ERR "soundbus: adding device failed sanity check!\n"); return -EINVAL; } dev_set_name(&dev->ofdev.dev, "soundbus:%x", ++devcount); dev->ofdev.dev.bus = &soundbus_bus_type; return of_device_register(&dev->ofdev); } EXPORT_SYMBOL_GPL(soundbus_add_one); void soundbus_remove_one(struct soundbus_dev *dev) { of_device_unregister(&dev->ofdev); } EXPORT_SYMBOL_GPL(soundbus_remove_one); int soundbus_register_driver(struct soundbus_driver *drv) { /* initialize common driver fields */ drv->driver.name = drv->name; drv->driver.bus = &soundbus_bus_type; /* register with core */ return driver_register(&drv->driver); } EXPORT_SYMBOL_GPL(soundbus_register_driver); void soundbus_unregister_driver(struct soundbus_driver *drv) { driver_unregister(&drv->driver); } EXPORT_SYMBOL_GPL(soundbus_unregister_driver); static int __init soundbus_init(void) { return bus_register(&soundbus_bus_type); } static void __exit soundbus_exit(void) { bus_unregister(&soundbus_bus_type); } subsys_initcall(soundbus_init); module_exit(soundbus_exit); mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 12:38:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 12:38:43 -0800
commit0263d4ebd94b36280608e296cba39b924b6e832b (patch)
tree6e21b4b3d8e8fb12cdfcfd185d46992487265a9b /tools/perf/Documentation/perf-probe.txt
parent19ca2c8fecb1592d623fe5e82d6796f8d446268d (diff)
parent7b9e1d89e1b6a3b99a8fdd949aa0f98dd5bf2f6b (diff)
Merge tag 'platform-drivers-x86-v4.10-4' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform-driver fixes from Andy Shevchenko: "This is my first pull request since I become a co-maintainer of Platform Drivers x86 subsystem. It's a bit bigger than usual due to material collected for almost two weeks in a row. MAINTAINERS: - Add myself to X86 PLATFORM DRIVERS as a co-maintainer ideapad-laptop: - handle ACPI event 1 intel_mid_powerbtn: - Set IRQ_ONESHOT surface3-wmi: - fix uninitialized symbol - Shut up unused-function warning mlx-platform: - free first dev on error" * tag 'platform-drivers-x86-v4.10-4' of git://git.infradead.org/linux-platform-drivers-x86: MAINTAINERS: Add myself to X86 PLATFORM DRIVERS as a co-maintainer platform/x86: ideapad-laptop: handle ACPI event 1 platform/x86: intel_mid_powerbtn: Set IRQ_ONESHOT platform/x86: surface3-wmi: fix uninitialized symbol platform/x86: surface3-wmi: Shut up unused-function warning platform/x86: mlx-platform: free first dev on error
Diffstat (limited to 'tools/perf/Documentation/perf-probe.txt')