static int exynos_bus_profile_init()

in exynos-bus.c [294:353]

• 43 lines of code
• 7 McCabe index (conditional complexity)

static int exynos_bus_profile_init(struct exynos_bus *bus,
				   struct devfreq_dev_profile *profile)
{
	struct device *dev = bus->dev;
	struct devfreq_simple_ondemand_data *ondemand_data;
	int ret;

	/* Initialize the struct profile and governor data for parent device */
	profile->polling_ms = 50;
	profile->target = exynos_bus_target;
	profile->get_dev_status = exynos_bus_get_dev_status;
	profile->exit = exynos_bus_exit;

	ondemand_data = devm_kzalloc(dev, sizeof(*ondemand_data), GFP_KERNEL);
	if (!ondemand_data)
		return -ENOMEM;

	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,
						DEVFREQ_GOV_SIMPLE_ONDEMAND,
						ondemand_data);
	if (IS_ERR(bus->devfreq)) {
		dev_err(dev, "failed to add devfreq device\n");
		return PTR_ERR(bus->devfreq);
	}

	/* Register opp_notifier to catch the change of OPP  */
	ret = devm_devfreq_register_opp_notifier(dev, bus->devfreq);
	if (ret < 0) {
		dev_err(dev, "failed to register opp notifier\n");
		return ret;
	}

	/*
	 * Enable devfreq-event to get raw data which is used to determine
	 * current bus load.
	 */
	ret = exynos_bus_enable_edev(bus);
	if (ret < 0) {
		dev_err(dev, "failed to enable devfreq-event devices\n");
		return ret;
	}

	ret = exynos_bus_set_event(bus);
	if (ret < 0) {
		dev_err(dev, "failed to set event to devfreq-event devices\n");
		goto err_edev;
	}

	return 0;

err_edev:
	if (exynos_bus_disable_edev(bus))
		dev_warn(dev, "failed to disable the devfreq-event devices\n");

	return ret;
}