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

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​
    ondemand_data = devm_kzalloc(dev, sizeof(*ondemand_data), GFP_KERNEL);
    if (!ondemand_data) {
        ret = -ENOMEM;
        goto err;
    }
    ondemand_data->upthreshold = 40;
    ondemand_data->downdifferential = 5;
​
    /* Add devfreq device to monitor and handle the exynos bus */
    bus->devfreq = devm_devfreq_add_device(dev, profile, "simple_ondemand",
    bus->devfreq = devm_devfreq_add_device(dev, profile,
                        DEVFREQ_GOV_SIMPLE_ONDEMAND,
                        ondemand_data);
    if (IS_ERR(bus->devfreq)) {
        dev_err(dev, "failed to add devfreq device\n");
        ret = PTR_ERR(bus->devfreq);
        goto err;
    }
​
    /* Register opp_notifier to catch the change of OPP  */
    ret = devm_devfreq_register_opp_notifier(dev, bus->devfreq);
    if (ret < 0) {
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    }
​
    passive_data = devm_kzalloc(dev, sizeof(*passive_data), GFP_KERNEL);
    if (!passive_data) {
        ret = -ENOMEM;
        goto err;
    }
    passive_data->parent = parent_devfreq;
​
    /* Add devfreq device for exynos bus with passive governor */
    bus->devfreq = devm_devfreq_add_device(dev, profile, "passive",
    bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
                        passive_data);
    if (IS_ERR(bus->devfreq)) {
        dev_err(dev,
            "failed to add devfreq dev with passive governor\n");
        ret = PTR_ERR(bus->devfreq);
        goto err;
    }
​
out:
    max_state = bus->devfreq->profile->max_state;