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rtc: rv8803: Add power management support

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Add power management support to the driver. This allows a SoC to wake
from suspend using the nINT provided by the RTC. Only register it as a
wakeup device if the interrupt is provided and handled.

Signed-off-by: Stefan Eichenberger <eichest@gmail.com>
Link: https://lore.kernel.org/r/20231122181611.164792-1-eichest@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Stefan Eichenberger 2023-11-22 19:16:11 +01:00 committed by Alexandre Belloni
parent 3628d999e3
commit 2f80de657f
1 changed files with 29 additions and 0 deletions
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29
drivers/rtc/rtc-rv8803.c
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@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/rtc.h>
#include <linux/pm_wakeirq.h>
#define RV8803_I2C_TRY_COUNT 4
@ -607,6 +608,28 @@ static int rv8803_regs_configure(struct rv8803_data *rv8803)
return 0;
}
static int rv8803_resume(struct device *dev)
{
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
if (rv8803->client->irq > 0 && device_may_wakeup(dev))
disable_irq_wake(rv8803->client->irq);
return 0;
}
static int rv8803_suspend(struct device *dev)
{
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
if (rv8803->client->irq > 0 && device_may_wakeup(dev))
enable_irq_wake(rv8803->client->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(rv8803_pm_ops, rv8803_suspend, rv8803_resume);
static const struct i2c_device_id rv8803_id[] = {
{ "rv8803", rv_8803 },
{ "rv8804", rx_8804 },
@ -683,6 +706,11 @@ static int rv8803_probe(struct i2c_client *client)
if (err) {
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
client->irq = 0;
} else {
device_init_wakeup(&client->dev, true);
err = dev_pm_set_wake_irq(&client->dev, client->irq);
if (err)
dev_err(&client->dev, "failed to set wake IRQ\n");
}
}
if (!client->irq)
@ -737,6 +765,7 @@ static struct i2c_driver rv8803_driver = {
.driver = {
.name = "rtc-rv8803",
.of_match_table = of_match_ptr(rv8803_of_match),
.pm = &rv8803_pm_ops,
},
.probe = rv8803_probe,
.id_table = rv8803_id,