Source of hwmon.c - linux-imx - PHYTEC BitBucket (Stash)

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    bool is_string = is_string_attr(type, attr);
​
    /* The attribute is invisible if there is no template string */
    if (!template)
        return ERR_PTR(-ENOENT);
​
    mode = ops->is_visible(drvdata, type, attr, index);
    if (!mode)
        return ERR_PTR(-ENOENT);
​
    if ((mode & S_IRUGO) && ((is_string && !ops->read_string) ||
    if ((mode & 0444) && ((is_string && !ops->read_string) ||
                 (!is_string && !ops->read)))
        return ERR_PTR(-EINVAL);
    if ((mode & S_IWUGO) && !ops->write)
    if ((mode & 0222) && !ops->write)
        return ERR_PTR(-EINVAL);
​
    hattr = devm_kzalloc(dev, sizeof(*hattr), GFP_KERNEL);
    if (!hattr)
        return ERR_PTR(-ENOMEM);
​
    if (type == hwmon_chip) {
        name = template;
    } else {
        scnprintf(hattr->name, sizeof(hattr->name), template,