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   memset(dev, 0, sizeof(*dev));
    dev->path = *path;
    dev->id = *devid;

    /* Initialize the back pointers in the link fields. */
    for (link = 0; link < MAX_LINKS; link++) {
        dev->link[link].dev = dev;
        dev->link[link].link = link;
    }

    /* By default devices are enabled. */
    dev->enabled = 1;

    /* Add the new device to the list of children of the bus. */
    dev->bus = parent;
    if (child) {
        child->sibling = dev;
    } else {
        parent->children = dev;
    }

    /* Append a new device to the global device list.
     * The list is used to find devices once everything is set up.
     */
    *last_dev_p = dev;
    last_dev_p = &dev->next;

    /* Give the device a name. */
    sprintf(dev->dtsname, "dynamic %s", dev_path(dev));

    /* Run the device specific constructor as last part of the chain
     * so it gets the chance to overwrite the "inherited" values above
     */

    constructor(dev);

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<div dir="ltr">Why do we call the constructor function of a new device?   I can't see where we ever set it.<br>Thanks,<br>Myles <br><br>From device/device.c:<br><br>   memset(dev, 0, sizeof(*dev));<br>    dev->path = *path;<br>
    dev->id = *devid;<br><br>    /* Initialize the back pointers in the link fields. */<br>    for (link = 0; link < MAX_LINKS; link++) {<br>        dev->link[link].dev = dev;<br>        dev->link[link].link = link;<br>
    }<br><br>    /* By default devices are enabled. */<br>    dev->enabled = 1;<br><br>    /* Add the new device to the list of children of the bus. */<br>    dev->bus = parent;<br>    if (child) {<br>        child->sibling = dev;<br>
    } else {<br>        parent->children = dev;<br>    }<br><br>    /* Append a new device to the global device list.<br>     * The list is used to find devices once everything is set up.<br>     */<br>    *last_dev_p = dev;<br>
    last_dev_p = &dev->next;<br><br>    /* Give the device a name. */<br>    sprintf(dev->dtsname, "dynamic %s", dev_path(dev));<br><br>    /* Run the device specific constructor as last part of the chain<br>
     * so it gets the chance to overwrite the "inherited" values above<br>     */<br><br>    constructor(dev);<br></div>

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