Function rt_mbox_request_by_index

components/drivers/mailbox/mailbox.c:227–317

}

struct rt_mbox_chan *rt_mbox_request_by_index(struct rt_mbox_client *client, int index)
{
    rt_err_t err;
    struct rt_ofw_cell_args args;
    struct rt_ofw_node *np, *ctrl_np;
    struct rt_mbox_controller *ctrl;
    struct rt_mbox_chan *chan = RT_NULL;

    if (!client && index < 0)
    {
        return rt_err_ptr(-RT_EINVAL);
    }

    np = client->dev->ofw_node;

    rt_spin_lock(&mbox_ops_lock);

    err = rt_ofw_parse_phandle_cells(np, "mboxes", "#mbox-cells", index, &args);

    if (err)
    {
        chan = rt_err_ptr(err);
        goto _out_lock;
    }

    ctrl_np = args.data;

    if (!rt_ofw_data(ctrl_np))
    {
        rt_spin_unlock(&mbox_ops_lock);

        rt_platform_ofw_request(ctrl_np);

        rt_spin_lock(&mbox_ops_lock);
    }

    ctrl = rt_ofw_data(ctrl_np);
    rt_ofw_node_put(ctrl_np);

    if (ctrl)
    {
        int index;

        if (ctrl->ops->ofw_parse)
        {
            index = ctrl->ops->ofw_parse(ctrl, &args);
        }
        else
        {
            index = mbox_controller_ofw_parse_default(ctrl, &args);
        }

        if (index >= 0)
        {
            chan = &ctrl->chans[index];
        }
        else
        {