+static int fm3130_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+ struct fm3130 *fm3130 = dev_get_drvdata(dev);
+ int ret = 0;
+
+ fm3130->regs[FM3130_RTC_CONTROL] =
+ i2c_smbus_read_byte_data(fm3130->client, FM3130_RTC_CONTROL);
+
+ dev_dbg(dev, "alarm_irq_enable: enable=%d, FM3130_RTC_CONTROL=%02x\n",
+ enabled, fm3130->regs[FM3130_RTC_CONTROL]);
+
+ switch (enabled) {
+ case 0: /* alarm off */
+ ret = i2c_smbus_write_byte_data(fm3130->client,
+ FM3130_RTC_CONTROL, fm3130->regs[FM3130_RTC_CONTROL] &
+ ~(FM3130_RTC_CONTROL_BIT_CAL) &
+ ~(FM3130_RTC_CONTROL_BIT_AEN));
+ break;
+ case 1: /* alarm on */
+ ret = i2c_smbus_write_byte_data(fm3130->client,
+ FM3130_RTC_CONTROL, (fm3130->regs[FM3130_RTC_CONTROL] &
+ ~(FM3130_RTC_CONTROL_BIT_CAL)) |
+ FM3130_RTC_CONTROL_BIT_AEN);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+