static int pcf85363_probe()

in rtc-pcf85363.c [353:425]

• 63 lines of code
• 8 McCabe index (conditional complexity)

static int pcf85363_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	struct pcf85363 *pcf85363;
	const struct pcf85x63_config *config = &pcf_85363_config;
	const void *data = of_device_get_match_data(&client->dev);
	static struct nvmem_config nvmem_cfg[] = {
		{
			.name = "pcf85x63-",
			.word_size = 1,
			.stride = 1,
			.size = 1,
			.reg_read = pcf85x63_nvram_read,
			.reg_write = pcf85x63_nvram_write,
		}, {
			.name = "pcf85363-",
			.word_size = 1,
			.stride = 1,
			.size = NVRAM_SIZE,
			.reg_read = pcf85363_nvram_read,
			.reg_write = pcf85363_nvram_write,
		},
	};
	int ret, i;

	if (data)
		config = data;

	pcf85363 = devm_kzalloc(&client->dev, sizeof(struct pcf85363),
				GFP_KERNEL);
	if (!pcf85363)
		return -ENOMEM;

	pcf85363->regmap = devm_regmap_init_i2c(client, &config->regmap);
	if (IS_ERR(pcf85363->regmap)) {
		dev_err(&client->dev, "regmap allocation failed\n");
		return PTR_ERR(pcf85363->regmap);
	}

	i2c_set_clientdata(client, pcf85363);

	pcf85363->rtc = devm_rtc_allocate_device(&client->dev);
	if (IS_ERR(pcf85363->rtc))
		return PTR_ERR(pcf85363->rtc);

	pcf85363->rtc->ops = &rtc_ops;
	pcf85363->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
	pcf85363->rtc->range_max = RTC_TIMESTAMP_END_2099;
	clear_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);

	if (client->irq > 0) {
		regmap_write(pcf85363->regmap, CTRL_FLAGS, 0);
		regmap_update_bits(pcf85363->regmap, CTRL_PIN_IO,
				   PIN_IO_INTA_OUT, PIN_IO_INTAPM);
		ret = devm_request_threaded_irq(&client->dev, client->irq,
						NULL, pcf85363_rtc_handle_irq,
						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
						"pcf85363", client);
		if (ret)
			dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
		else
			set_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);
	}

	ret = devm_rtc_register_device(pcf85363->rtc);

	for (i = 0; i < config->num_nvram; i++) {
		nvmem_cfg[i].priv = pcf85363;
		devm_rtc_nvmem_register(pcf85363->rtc, &nvmem_cfg[i]);
	}

	return ret;
}