![Lars-Peter Clausen](/assets/img/avatar_default.png)
Update the aoa-soundbus framework to use dev_pm_ops rather than the deprecated legacy suspend and resume callbacks. Since there isn't anything special to do at the bus level the bus driver does not have to implement any callbacks. The device driver core will automatically pick up and execute the device's PM ops. As there is only a single aoa-soundbus driver implementing suspend and resume, update both the core and driver at the same time to avoid unnecessary code churn. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
194 lines
4.4 KiB
C
194 lines
4.4 KiB
C
/*
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* soundbus
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*
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* GPL v2, can be found in COPYING.
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*/
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#include <linux/module.h>
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#include "soundbus.h"
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MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Apple Soundbus");
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struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev)
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{
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struct device *tmp;
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if (!dev)
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return NULL;
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tmp = get_device(&dev->ofdev.dev);
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if (tmp)
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return to_soundbus_device(tmp);
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else
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return NULL;
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}
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EXPORT_SYMBOL_GPL(soundbus_dev_get);
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void soundbus_dev_put(struct soundbus_dev *dev)
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{
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if (dev)
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put_device(&dev->ofdev.dev);
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}
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EXPORT_SYMBOL_GPL(soundbus_dev_put);
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static int soundbus_probe(struct device *dev)
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{
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int error = -ENODEV;
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struct soundbus_driver *drv;
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struct soundbus_dev *soundbus_dev;
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drv = to_soundbus_driver(dev->driver);
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soundbus_dev = to_soundbus_device(dev);
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if (!drv->probe)
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return error;
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soundbus_dev_get(soundbus_dev);
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error = drv->probe(soundbus_dev);
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if (error)
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soundbus_dev_put(soundbus_dev);
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return error;
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}
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static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct soundbus_dev * soundbus_dev;
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struct platform_device * of;
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const char *compat;
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int retval = 0;
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int cplen, seen = 0;
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if (!dev)
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return -ENODEV;
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soundbus_dev = to_soundbus_device(dev);
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if (!soundbus_dev)
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return -ENODEV;
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of = &soundbus_dev->ofdev;
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/* stuff we want to pass to /sbin/hotplug */
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retval = add_uevent_var(env, "OF_NAME=%s", of->dev.of_node->name);
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if (retval)
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return retval;
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retval = add_uevent_var(env, "OF_TYPE=%s", of->dev.of_node->type);
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if (retval)
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return retval;
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/* Since the compatible field can contain pretty much anything
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* it's not really legal to split it out with commas. We split it
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* up using a number of environment variables instead. */
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compat = of_get_property(of->dev.of_node, "compatible", &cplen);
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while (compat && cplen > 0) {
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int tmp = env->buflen;
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retval = add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat);
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if (retval)
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return retval;
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compat += env->buflen - tmp;
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cplen -= env->buflen - tmp;
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seen += 1;
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}
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retval = add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
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if (retval)
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return retval;
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retval = add_uevent_var(env, "MODALIAS=%s", soundbus_dev->modalias);
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return retval;
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}
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static int soundbus_device_remove(struct device *dev)
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{
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struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
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struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
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if (dev->driver && drv->remove)
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drv->remove(soundbus_dev);
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soundbus_dev_put(soundbus_dev);
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return 0;
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}
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static void soundbus_device_shutdown(struct device *dev)
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{
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struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
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struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
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if (dev->driver && drv->shutdown)
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drv->shutdown(soundbus_dev);
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}
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/* soundbus_dev_attrs is declared in sysfs.c */
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ATTRIBUTE_GROUPS(soundbus_dev);
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static struct bus_type soundbus_bus_type = {
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.name = "aoa-soundbus",
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.probe = soundbus_probe,
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.uevent = soundbus_uevent,
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.remove = soundbus_device_remove,
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.shutdown = soundbus_device_shutdown,
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.dev_groups = soundbus_dev_groups,
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};
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int soundbus_add_one(struct soundbus_dev *dev)
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{
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static int devcount;
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/* sanity checks */
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if (!dev->attach_codec ||
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!dev->ofdev.dev.of_node ||
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dev->pcmname ||
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dev->pcmid != -1) {
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printk(KERN_ERR "soundbus: adding device failed sanity check!\n");
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return -EINVAL;
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}
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dev_set_name(&dev->ofdev.dev, "soundbus:%x", ++devcount);
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dev->ofdev.dev.bus = &soundbus_bus_type;
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return of_device_register(&dev->ofdev);
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}
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EXPORT_SYMBOL_GPL(soundbus_add_one);
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void soundbus_remove_one(struct soundbus_dev *dev)
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{
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of_device_unregister(&dev->ofdev);
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}
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EXPORT_SYMBOL_GPL(soundbus_remove_one);
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int soundbus_register_driver(struct soundbus_driver *drv)
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{
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/* initialize common driver fields */
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drv->driver.name = drv->name;
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drv->driver.bus = &soundbus_bus_type;
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/* register with core */
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return driver_register(&drv->driver);
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}
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EXPORT_SYMBOL_GPL(soundbus_register_driver);
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void soundbus_unregister_driver(struct soundbus_driver *drv)
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{
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driver_unregister(&drv->driver);
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}
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EXPORT_SYMBOL_GPL(soundbus_unregister_driver);
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static int __init soundbus_init(void)
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{
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return bus_register(&soundbus_bus_type);
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}
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static void __exit soundbus_exit(void)
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{
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bus_unregister(&soundbus_bus_type);
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}
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subsys_initcall(soundbus_init);
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module_exit(soundbus_exit);
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