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path: root/drivers/rtc/rtc-s35390a.c
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Diffstat (limited to 'drivers/rtc/rtc-s35390a.c')
-rw-r--r--drivers/rtc/rtc-s35390a.c55
1 files changed, 29 insertions, 26 deletions
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index 8c37acb4a007..84806ff763cf 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -32,21 +32,22 @@
#define S35390A_ALRM_BYTE_MINS 2
/* flags for STATUS1 */
-#define S35390A_FLAG_POC 0x01
-#define S35390A_FLAG_BLD 0x02
-#define S35390A_FLAG_INT2 0x04
-#define S35390A_FLAG_24H 0x40
-#define S35390A_FLAG_RESET 0x80
+#define S35390A_FLAG_POC BIT(0)
+#define S35390A_FLAG_BLD BIT(1)
+#define S35390A_FLAG_INT2 BIT(2)
+#define S35390A_FLAG_24H BIT(6)
+#define S35390A_FLAG_RESET BIT(7)
/* flag for STATUS2 */
-#define S35390A_FLAG_TEST 0x01
-
-#define S35390A_INT2_MODE_MASK 0xF0
+#define S35390A_FLAG_TEST BIT(0)
+/* INT2 pin output mode */
+#define S35390A_INT2_MODE_MASK 0x0E
#define S35390A_INT2_MODE_NOINTR 0x00
-#define S35390A_INT2_MODE_FREQ 0x10
-#define S35390A_INT2_MODE_ALARM 0x40
-#define S35390A_INT2_MODE_PMIN_EDG 0x20
+#define S35390A_INT2_MODE_ALARM BIT(1) /* INT2AE */
+#define S35390A_INT2_MODE_PMIN_EDG BIT(2) /* INT2ME */
+#define S35390A_INT2_MODE_FREQ BIT(3) /* INT2FE */
+#define S35390A_INT2_MODE_PMIN (BIT(3) | BIT(2)) /* INT2FE | INT2ME */
static const struct i2c_device_id s35390a_id[] = {
{ "s35390a", 0 },
@@ -284,6 +285,9 @@ static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
alm->time.tm_min, alm->time.tm_hour, alm->time.tm_mday,
alm->time.tm_mon, alm->time.tm_year, alm->time.tm_wday);
+ if (alm->time.tm_sec != 0)
+ dev_warn(&client->dev, "Alarms are only supported on a per minute basis!\n");
+
/* disable interrupt (which deasserts the irq line) */
err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts));
if (err < 0)
@@ -299,9 +303,6 @@ static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
else
sts = S35390A_INT2_MODE_NOINTR;
- /* This chip expects the bits of each byte to be in reverse order */
- sts = bitrev8(sts);
-
/* set interupt mode*/
err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts));
if (err < 0)
@@ -339,7 +340,7 @@ static int s35390a_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
if (err < 0)
return err;
- if ((bitrev8(sts) & S35390A_INT2_MODE_MASK) != S35390A_INT2_MODE_ALARM) {
+ if ((sts & S35390A_INT2_MODE_MASK) != S35390A_INT2_MODE_ALARM) {
/*
* When the alarm isn't enabled, the register to configure
* the alarm time isn't accessible.
@@ -431,14 +432,14 @@ static int s35390a_probe(struct i2c_client *client,
unsigned int i;
struct s35390a *s35390a;
char buf, status1;
+ struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
err = -ENODEV;
goto exit;
}
- s35390a = devm_kzalloc(&client->dev, sizeof(struct s35390a),
- GFP_KERNEL);
+ s35390a = devm_kzalloc(dev, sizeof(struct s35390a), GFP_KERNEL);
if (!s35390a) {
err = -ENOMEM;
goto exit;
@@ -452,8 +453,8 @@ static int s35390a_probe(struct i2c_client *client,
s35390a->client[i] = i2c_new_dummy(client->adapter,
client->addr + i);
if (!s35390a->client[i]) {
- dev_err(&client->dev, "Address %02x unavailable\n",
- client->addr + i);
+ dev_err(dev, "Address %02x unavailable\n",
+ client->addr + i);
err = -EBUSY;
goto exit_dummy;
}
@@ -462,7 +463,7 @@ static int s35390a_probe(struct i2c_client *client,
err_read = s35390a_read_status(s35390a, &status1);
if (err_read < 0) {
err = err_read;
- dev_err(&client->dev, "error resetting chip\n");
+ dev_err(dev, "error resetting chip\n");
goto exit_dummy;
}
@@ -476,28 +477,30 @@ static int s35390a_probe(struct i2c_client *client,
buf = 0;
err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &buf, 1);
if (err < 0) {
- dev_err(&client->dev, "error disabling alarm");
+ dev_err(dev, "error disabling alarm");
goto exit_dummy;
}
} else {
err = s35390a_disable_test_mode(s35390a);
if (err < 0) {
- dev_err(&client->dev, "error disabling test mode\n");
+ dev_err(dev, "error disabling test mode\n");
goto exit_dummy;
}
}
- device_set_wakeup_capable(&client->dev, 1);
+ device_set_wakeup_capable(dev, 1);
- s35390a->rtc = devm_rtc_device_register(&client->dev,
- s35390a_driver.driver.name,
- &s35390a_rtc_ops, THIS_MODULE);
+ s35390a->rtc = devm_rtc_device_register(dev, s35390a_driver.driver.name,
+ &s35390a_rtc_ops, THIS_MODULE);
if (IS_ERR(s35390a->rtc)) {
err = PTR_ERR(s35390a->rtc);
goto exit_dummy;
}
+ /* supports per-minute alarms only, therefore set uie_unsupported */
+ s35390a->rtc->uie_unsupported = 1;
+
if (status1 & S35390A_FLAG_INT2)
rtc_update_irq(s35390a->rtc, 1, RTC_AF);