static int rv3032_probe()

in rtc-rv3032.c [890:976]

• 72 lines of code
• 10 McCabe index (conditional complexity)

static int rv3032_probe(struct i2c_client *client)
{
	struct rv3032_data *rv3032;
	int ret, status;
	struct nvmem_config nvmem_cfg = {
		.name = "rv3032_nvram",
		.word_size = 1,
		.stride = 1,
		.size = 16,
		.type = NVMEM_TYPE_BATTERY_BACKED,
		.reg_read = rv3032_nvram_read,
		.reg_write = rv3032_nvram_write,
	};
	struct nvmem_config eeprom_cfg = {
		.name = "rv3032_eeprom",
		.word_size = 1,
		.stride = 1,
		.size = 32,
		.type = NVMEM_TYPE_EEPROM,
		.reg_read = rv3032_eeprom_read,
		.reg_write = rv3032_eeprom_write,
	};

	rv3032 = devm_kzalloc(&client->dev, sizeof(struct rv3032_data),
			      GFP_KERNEL);
	if (!rv3032)
		return -ENOMEM;

	rv3032->regmap = devm_regmap_init_i2c(client, &regmap_config);
	if (IS_ERR(rv3032->regmap))
		return PTR_ERR(rv3032->regmap);

	i2c_set_clientdata(client, rv3032);

	ret = regmap_read(rv3032->regmap, RV3032_STATUS, &status);
	if (ret < 0)
		return ret;

	rv3032->rtc = devm_rtc_allocate_device(&client->dev);
	if (IS_ERR(rv3032->rtc))
		return PTR_ERR(rv3032->rtc);

	if (client->irq > 0) {
		ret = devm_request_threaded_irq(&client->dev, client->irq,
						NULL, rv3032_handle_irq,
						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
						"rv3032", rv3032);
		if (ret) {
			dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
			client->irq = 0;
		}
	}
	if (!client->irq)
		clear_bit(RTC_FEATURE_ALARM, rv3032->rtc->features);

	ret = regmap_update_bits(rv3032->regmap, RV3032_CTRL1,
				 RV3032_CTRL1_WADA, RV3032_CTRL1_WADA);
	if (ret)
		return ret;

	rv3032_trickle_charger_setup(&client->dev, rv3032);

	set_bit(RTC_FEATURE_BACKUP_SWITCH_MODE, rv3032->rtc->features);
	set_bit(RTC_FEATURE_ALARM_RES_MINUTE, rv3032->rtc->features);

	rv3032->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
	rv3032->rtc->range_max = RTC_TIMESTAMP_END_2099;
	rv3032->rtc->ops = &rv3032_rtc_ops;
	ret = devm_rtc_register_device(rv3032->rtc);
	if (ret)
		return ret;

	nvmem_cfg.priv = rv3032->regmap;
	devm_rtc_nvmem_register(rv3032->rtc, &nvmem_cfg);
	eeprom_cfg.priv = rv3032;
	devm_rtc_nvmem_register(rv3032->rtc, &eeprom_cfg);

	rv3032->rtc->max_user_freq = 1;

#ifdef CONFIG_COMMON_CLK
	rv3032_clkout_register_clk(rv3032, client);
#endif

	rv3032_hwmon_register(&client->dev);

	return 0;
}