static int pmbus_init_debugfs()

in pmbus/pmbus_core.c [2541:2678]

• 116 lines of code
• 16 McCabe index (conditional complexity)

static int pmbus_init_debugfs(struct i2c_client *client,
			      struct pmbus_data *data)
{
	int i, idx = 0;
	char name[PMBUS_NAME_SIZE];
	struct pmbus_debugfs_entry *entries;

	if (!pmbus_debugfs_dir)
		return -ENODEV;

	/*
	 * Create the debugfs directory for this device. Use the hwmon device
	 * name to avoid conflicts (hwmon numbers are globally unique).
	 */
	data->debugfs = debugfs_create_dir(dev_name(data->hwmon_dev),
					   pmbus_debugfs_dir);
	if (IS_ERR_OR_NULL(data->debugfs)) {
		data->debugfs = NULL;
		return -ENODEV;
	}

	/* Allocate the max possible entries we need. */
	entries = devm_kcalloc(data->dev,
			       data->info->pages * 10, sizeof(*entries),
			       GFP_KERNEL);
	if (!entries)
		return -ENOMEM;

	debugfs_create_file("pec", 0664, data->debugfs, client,
			    &pmbus_debugfs_ops_pec);

	for (i = 0; i < data->info->pages; ++i) {
		/* Check accessibility of status register if it's not page 0 */
		if (!i || pmbus_check_status_register(client, i)) {
			/* No need to set reg as we have special read op. */
			entries[idx].client = client;
			entries[idx].page = i;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops_status);
		}

		if (data->info->func[i] & PMBUS_HAVE_STATUS_VOUT) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_VOUT;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_vout", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (data->info->func[i] & PMBUS_HAVE_STATUS_IOUT) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_IOUT;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_iout", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (data->info->func[i] & PMBUS_HAVE_STATUS_INPUT) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_INPUT;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_input", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (data->info->func[i] & PMBUS_HAVE_STATUS_TEMP) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_TEMPERATURE;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_temp", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (pmbus_check_byte_register(client, i, PMBUS_STATUS_CML)) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_CML;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_cml", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (pmbus_check_byte_register(client, i, PMBUS_STATUS_OTHER)) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_OTHER;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_other", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (pmbus_check_byte_register(client, i,
					      PMBUS_STATUS_MFR_SPECIFIC)) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_MFR_SPECIFIC;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_mfr", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN12) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_FAN_12;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan12", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}

		if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN34) {
			entries[idx].client = client;
			entries[idx].page = i;
			entries[idx].reg = PMBUS_STATUS_FAN_34;
			scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan34", i);
			debugfs_create_file(name, 0444, data->debugfs,
					    &entries[idx++],
					    &pmbus_debugfs_ops);
		}
	}

	return devm_add_action_or_reset(data->dev,
					pmbus_remove_debugfs, data->debugfs);
}