Commit 2f80de65 authored by Stefan Eichenberger's avatar Stefan Eichenberger Committed by Alexandre Belloni
Browse files

rtc: rv8803: Add power management support 



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: default avatarStefan Eichenberger <eichest@gmail.com>
Link: https://lore.kernel.org/r/20231122181611.164792-1-eichest@gmail.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 3628d999

drivers/rtc/rtc-rv8803.c

+29 −0
Original line number Diff line number Diff line
@@ -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,