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| author | Eric Cooper <ecc@cmu.edu> | 2017-07-29 20:10:54 -0400 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-08-24 11:03:34 +0200 |
| commit | d4473b9b778f39f0b5da870a9a96b5778861c60b (patch) | |
| tree | 9979ba01d75fa5efa783f35f9f191c3a03da3afa | |
| parent | 60d345521143ed73b7acc4d99d3ad1afb2890520 (diff) | |
| download | linux-d4473b9b778f39f0b5da870a9a96b5778861c60b.tar.gz linux-d4473b9b778f39f0b5da870a9a96b5778861c60b.tar.bz2 linux-d4473b9b778f39f0b5da870a9a96b5778861c60b.zip | |
rtc: m41t80: enable wakealarm when "wakeup-source" is specified
Don't require an IRQ if the wakeup-source device-tree property is present.
Signed-off-by: Eric Cooper <ecc@cmu.edu>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| -rw-r--r-- | drivers/rtc/rtc-m41t80.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index 8940e9e43ea0..412a4e04de79 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -927,6 +927,7 @@ static int m41t80_probe(struct i2c_client *client, struct rtc_device *rtc = NULL; struct rtc_time tm; struct m41t80_data *m41t80_data = NULL; + bool wakeup_source = false; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_BYTE_DATA)) { @@ -947,6 +948,10 @@ static int m41t80_probe(struct i2c_client *client, m41t80_data->features = id->driver_data; i2c_set_clientdata(client, m41t80_data); +#ifdef CONFIG_OF + wakeup_source = of_property_read_bool(client->dev.of_node, + "wakeup-source"); +#endif if (client->irq > 0) { rc = devm_request_threaded_irq(&client->dev, client->irq, NULL, m41t80_handle_irq, @@ -955,14 +960,16 @@ static int m41t80_probe(struct i2c_client *client, if (rc) { dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n"); client->irq = 0; - } else { - m41t80_rtc_ops.read_alarm = m41t80_read_alarm; - m41t80_rtc_ops.set_alarm = m41t80_set_alarm; - m41t80_rtc_ops.alarm_irq_enable = m41t80_alarm_irq_enable; - /* Enable the wakealarm */ - device_init_wakeup(&client->dev, true); + wakeup_source = false; } } + if (client->irq > 0 || wakeup_source) { + m41t80_rtc_ops.read_alarm = m41t80_read_alarm; + m41t80_rtc_ops.set_alarm = m41t80_set_alarm; + m41t80_rtc_ops.alarm_irq_enable = m41t80_alarm_irq_enable; + /* Enable the wakealarm */ + device_init_wakeup(&client->dev, true); + } rtc = devm_rtc_device_register(&client->dev, client->name, &m41t80_rtc_ops, THIS_MODULE); @@ -970,6 +977,10 @@ static int m41t80_probe(struct i2c_client *client, return PTR_ERR(rtc); m41t80_data->rtc = rtc; + if (client->irq <= 0) { + /* We cannot support UIE mode if we do not have an IRQ line */ + rtc->uie_unsupported = 1; + } /* Make sure HT (Halt Update) bit is cleared */ rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_HOUR); |