linux-kernel - [PATCH] rtc: DS1374 wakup support

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Message-Id: <200807211359.51592.marc.pignat@hevs.ch>
Date:	Mon, 21 Jul 2008 13:59:50 +0200
From:	Marc Pignat <marc.pignat@...s.ch>
To:	a.zummo@...ertech.it
Cc:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: [PATCH] rtc: DS1374 wakup support

Wakeup support implementation.

Signed-off-by: Marc Pignat <marc.pignat@...s.ch>
---

Hi all!

patch agaist 2.6.26, tested on custom ARM board.

Best Regards

Marc



diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c
index 640acd2..0527dec 100644
--- a/drivers/rtc/rtc-ds1374.c
+++ b/drivers/rtc/rtc-ds1374.c
@@ -388,6 +388,7 @@ static int ds1374_probe(struct i2c_client *client,
 			dev_err(&client->dev, "unable to request IRQ\n");
 			goto out_free;
 		}
+		device_init_wakeup(&client->dev, 1);
 	}
 
 	ds1374->rtc = rtc_device_register(client->name, &client->dev,
@@ -401,8 +402,10 @@ static int ds1374_probe(struct i2c_client *client,
 	return 0;
 
 out_irq:
-	if (client->irq >= 0)
+	if (client->irq >= 0) {
+		device_init_wakeup(&client->dev, 0);
 		free_irq(client->irq, client);
+	}
 
 out_free:
 	i2c_set_clientdata(client, NULL);
@@ -419,6 +422,7 @@ static int __devexit ds1374_remove(struct i2c_client *client)
 		ds1374->exiting = 1;
 		mutex_unlock(&ds1374->mutex);
 
+		device_init_wakeup(&client->dev, 0);
 		free_irq(client->irq, client);
 		flush_scheduled_work();
 	}
@@ -429,12 +433,33 @@ static int __devexit ds1374_remove(struct i2c_client *client)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int ds1374_suspend(struct i2c_client *client, pm_message_t state)
+{
+	if (client->irq >= 0 && device_may_wakeup(&client->dev))
+		enable_irq_wake(client->irq);
+	return 0;
+}
+
+static int ds1374_resume(struct i2c_client *client)
+{
+	if (client->irq >= 0 && device_may_wakeup(&client->dev))
+		disable_irq_wake(client->irq);
+	return 0;
+}
+#else
+#define ds1374_suspend	NULL
+#define ds1374_resume	NULL
+#endif
+
 static struct i2c_driver ds1374_driver = {
 	.driver = {
 		.name = "rtc-ds1374",
 		.owner = THIS_MODULE,
 	},
 	.probe = ds1374_probe,
+	.suspend = ds1374_suspend,
+	.resume = ds1374_resume,
 	.remove = __devexit_p(ds1374_remove),
 	.id_table = ds1374_id,
 };
--
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