@@ -1312,7 +1312,7 @@ static int ds1307_probe(struct i2c_client *client,
int err = -ENODEV;
int tmp, wday;
const struct chip_desc *chip;
- bool want_irq = false;
+ bool want_irq;
bool ds1307_can_wakeup_device = false;
unsigned char *buf;
struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev);
@@ -1358,6 +1358,8 @@ static int ds1307_probe(struct i2c_client *client,
ds1307->type = acpi_id->driver_data;
}
+ want_irq = client->irq > 0 && chip->alarm;
+
if (!pdata)
trickle_charger_setup = ds1307_trickle_init(ds1307, chip);
else if (pdata->trickle_charger_setup)
@@ -1383,7 +1385,8 @@ static int ds1307_probe(struct i2c_client *client,
* This will guarantee the 'wakealarm' sysfs entry is available on the device,
* if supported by the RTC.
*/
- if (of_property_read_bool(client->dev.of_node, "wakeup-source"))
+ if (chip->alarm && of_property_read_bool(client->dev.of_node,
+ "wakeup-source"))
ds1307_can_wakeup_device = true;
#endif
@@ -1409,12 +1412,9 @@ static int ds1307_probe(struct i2c_client *client,
* For some variants, be sure alarms can trigger when we're
* running on Vbackup (BBSQI/BBSQW)
*/
- if (chip->alarm && (client->irq > 0 ||
- ds1307_can_wakeup_device)) {
+ if (want_irq || ds1307_can_wakeup_device) {
ds1307->regs[0] |= DS1337_BIT_INTCN | chip->bbsqi_bit;
ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE);
-
- want_irq = true;
}
regmap_write(ds1307->regmap, DS1337_REG_CONTROL,
@@ -1493,21 +1493,16 @@ static int ds1307_probe(struct i2c_client *client,
case rx_8130:
ds1307->offset = 0x10; /* Seconds starts at 0x10 */
rtc_ops = &rx8130_rtc_ops;
- if (chip->alarm && client->irq > 0) {
+ if (want_irq)
irq_handler = rx8130_irq;
- want_irq = true;
- }
break;
case ds_1388:
ds1307->offset = 1; /* Seconds starts at 1 */
break;
case mcp794xx:
rtc_ops = &mcp794xx_rtc_ops;
- if (chip->alarm && (client->irq > 0 ||
- ds1307_can_wakeup_device)) {
+ if (want_irq || ds1307_can_wakeup_device)
irq_handler = mcp794xx_irq;
- want_irq = true;
- }
break;
default:
break;
@@ -1639,7 +1634,7 @@ static int ds1307_probe(struct i2c_client *client,
MCP794XX_REG_WEEKDAY_WDAY_MASK,
tm.tm_wday + 1);
- if (want_irq) {
+ if (want_irq || ds1307_can_wakeup_device) {
device_set_wakeup_capable(ds1307->dev, true);
set_bit(HAS_ALARM, &ds1307->flags);
}
@@ -1649,9 +1644,7 @@ static int ds1307_probe(struct i2c_client *client,
return PTR_ERR(ds1307->rtc);
}
- if (ds1307_can_wakeup_device && client->irq <= 0) {
- /* Disable request for an IRQ */
- want_irq = false;
+ if (ds1307_can_wakeup_device && !want_irq) {
dev_info(ds1307->dev,
"'wakeup-source' is set, request for an IRQ is disabled!\n");
/* We cannot support UIE mode if we do not have an IRQ line */
Change the usage of variable want_irq to reflect its name. Don't set it to true in case wakeup is enabled but no interrupt number is given. In addition set variable ds1307_can_wakeup_device if chip->alarm is set only. This allows to simplify the code and make it better understandable. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> --- drivers/rtc/rtc-ds1307.c | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-)