最終更新:2015-02-02 (月) 17:01:09 (2456d)  

device_create
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creates a device and registers it with sysfs

struct device device_create(class *class, device *parent, dev_t devt, void *drvdata, const char *fmt, ...)

メモ

  • クラスにデバイスを割り当て

定義

  • /**
     * device_create - creates a device and registers it with sysfs
     * @class: pointer to the struct class that this device should be registered to
     * @parent: pointer to the parent struct device of this new device, if any
     * @devt: the dev_t for the char device to be added
     * @drvdata: the data to be added to the device for callbacks
     * @fmt: string for the device's name
     *
     * This function can be used by char device classes.  A struct device
     * will be created in sysfs, registered to the specified class.
     *
     * A "dev" file will be created, showing the dev_t for the device, if
     * the dev_t is not 0,0.
     * If a pointer to a parent struct device is passed in, the newly created
     * struct device will be a child of that device in sysfs.
     * The pointer to the struct device will be returned from the call.
     * Any further sysfs files that might be required can be created using this
     * pointer.
     *
     * Returns &struct device pointer on success, or ERR_PTR() on error.
     *
     * Note: the struct class passed to this function must have previously
     * been created with a call to class_create().
     */
    struct device *device_create(struct class *class, struct device *parent,
                                 dev_t devt, void *drvdata, const char *fmt, ...)
    {
            va_list vargs;
            struct device *dev;
    
            va_start(vargs, fmt);
            dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs);
            va_end(vargs);
            return dev;
    }

  • device_create(hidraw_class, &hid->dev, MKDEV(hidraw_major, minor), NULL, "%s%d", "hidraw", minor);

実装

  • drivers/base/core.c?

関連