Function rt_regulator_get

components/drivers/regulator/regulator.c:545–611

}

struct rt_regulator *rt_regulator_get(struct rt_device *dev, const char *id)
{
    struct rt_regulator *reg = RT_NULL;
    struct rt_regulator_node *reg_np = RT_NULL;

    if (!dev || !id)
    {
        reg = rt_err_ptr(-RT_EINVAL);
        goto _end;
    }

#ifdef RT_USING_OFW
    if (dev->ofw_node)
    {
        rt_phandle supply_phandle;
        struct rt_ofw_node *np = dev->ofw_node;
        char supply_name[64];

        rt_snprintf(supply_name, sizeof(supply_name), "%s-supply", id);

        if (rt_ofw_prop_read_u32(np, supply_name, &supply_phandle))
        {
            goto _end;
        }

        if (!(np = rt_ofw_find_node_by_phandle(supply_phandle)))
        {
            reg = rt_err_ptr(-RT_EIO);
            goto _end;
        }

        if (!rt_ofw_data(np))
        {
            rt_platform_ofw_request(np);
        }

        reg_np = rt_ofw_data(np);
        rt_ofw_node_put(np);
    }
#endif

    if (!reg_np)
    {
        reg = rt_err_ptr(-RT_ENOSYS);
        goto _end;
    }

    rt_hw_spin_lock(&_regulator_lock.lock);

    regulator_check_parent(reg_np);

    rt_hw_spin_unlock(&_regulator_lock.lock);

    reg = rt_calloc(1, sizeof(*reg));

    if (!reg)
    {
        reg = rt_err_ptr(-RT_ENOMEM);