static int s35390a_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alm)
{
struct s35390a *s35390a = i2c_get_clientdata(client);
char buf[3], sts;
int i, err;
if (s35390a_get_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts)) < 0)
return -EIO;
sts = bitrev8(sts);
s35390a_alarm_irq_enable(client, 1);
err = s35390a_get_reg(s35390a, S35390A_CMD_INT1_REG1, buf, sizeof(buf));
if (err < 0)
return err;
/* This chip returns the bits of each byte in reverse order */
for (i = 0; i < 3; ++i) {
buf[i] = bitrev8(buf[i]);
buf[i] &= ~0x80;
}
alm->time.tm_wday = bcd2bin(buf[S35390A_ALRM_BYTE_WDAY]);
alm->time.tm_hour = s35390a_reg2hr(s35390a, buf[S35390A_ALRM_BYTE_HOURS]);
alm->time.tm_min = bcd2bin(buf[S35390A_ALRM_BYTE_MINS]);
dev_dbg(&client->dev, "%s: alm is mins=%d, hours=%d, wday=%d\n",
__func__, alm->time.tm_min, alm->time.tm_hour,
alm->time.tm_wday);
if (!(sts & BIT(2)))
s35390a_alarm_irq_enable(client, 0);
return 0;
}
static void s35390a_work(struct work_struct *work)
{
struct s35390a *s35390a;
struct i2c_client *client;
char buf[1];
s35390a = container_of(work, struct s35390a, work);
if (!s35390a)
return;
client = s35390a->client[0];
if (s35390a_get_reg(s35390a, S35390A_CMD_STATUS2, buf, sizeof(buf)) < 0)
goto out;
/* This chip returns the bits of each byte in reverse order */
buf[0] = bitrev8(buf[0]);
if (buf[0] & BIT(2)) {
/* Notify RTC core on event */
rtc_update_irq(s35390a->rtc, 1, RTC_IRQF | RTC_AF);
s35390a_alarm_irq_enable(client, 0);
} else if (buf[0] & BIT(0)) {
/* Notify RTC core on event */
rtc_update_irq(s35390a->rtc, 1, RTC_PF | RTC_IRQF);
} else if (buf[0] & BIT(1)) {
/* Notify RTC core on event */
rtc_update_irq(s35390a->rtc, 1, RTC_UF | RTC_IRQF);
}
enable_irq(client->irq);
out:
return;
}
static int s35390a_rtc_alarm_irq_enable(struct device *dev, unsigned enabled)
{
return s35390a_alarm_irq_enable(to_i2c_client(dev), enabled);
}
