Function rt_clk_register

components/drivers/clk/clk.c:214–269

* @brief Register clock node into clock list * * @param clk_np point to child node that will be registered node. * @param parent_np point to parent rt_clk. If it is RT_NULL, clock node will be linked to init node. * * @retval RT_EOK * @retval -RT_ENOMEM */

 * @retval  -RT_ENOMEM
 */
rt_err_t rt_clk_register(struct rt_clk_node *clk_np, struct rt_clk_node *parent_np)
{
    rt_err_t err = RT_EOK;
    struct rt_clk *clk = RT_NULL;

    if (clk_np)
    {
        clk_np->clk = clk;

        if (!clk_np->ops)
        {
            clk_np->ops = &unused_clk_ops;
        }

    #if RT_NAME_MAX > 0
        rt_strncpy(clk_np->rt_parent.name, RT_CLK_NODE_OBJ_NAME, RT_NAME_MAX);
    #else
        clk_np->rt_parent.name = RT_CLK_NODE_OBJ_NAME;
    #endif

        rt_ref_init(&clk_np->ref);
        rt_list_init(&clk_np->list);
        rt_list_init(&clk_np->children_nodes);
        clk_np->multi_clk = 0;

        if (parent_np)
        {
            clk_np->clk = clk_alloc(clk_np, RT_NULL, RT_NULL, RT_NULL);

            if (clk_np->clk)
            {
                clk_set_parent(clk_np, parent_np);
            }
            else
            {
                err = -RT_ENOMEM;
            }
        }
        else
        {
            clk_np->parent = RT_NULL;

            rt_hw_spin_lock(&_clk_lock.lock);

            rt_list_insert_after(&_clk_nodes, &clk_np->list);

            rt_hw_spin_unlock(&_clk_lock.lock);
        }
    }
    else
    {
        err = -RT_ENOMEM;
    }

    return err;
}

/**