linux-kernel - [PATCH 1/7] i2c-at91: Use struct dev_pm

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Message-Id: <201207112122.47495.rjw@sisk.pl>
Date:	Wed, 11 Jul 2012 21:22:47 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	linux-i2c@...r.kernel.org, Sonic Zhang <sonic.zhang@...log.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Ben Dooks <ben-linux@...ff.org>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Peter Korsgaard <jacmet@...site.dk>,
	Guan Xuetao <gxt@...c.pku.edu.cn>,
	Vitaly Wool <vitalywool@...il.com>,
	Colin Cross <ccross@...roid.com>,
	Stephen Warren <swarren@...dotorg.org>
Subject: [PATCH 1/7] i2c-at91: Use struct dev_pm_ops for power management

From: Rafael J. Wysocki <rjw@...k.pl>

Make the AT91 Two-Wire Interface driver define its PM callbacks
through a struct dev_pm_ops object rather than by using legacy PM
hooks in struct platform_driver.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/i2c/busses/i2c-at91.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Index: linux/drivers/i2c/busses/i2c-at91.c
===================================================================
--- linux.orig/drivers/i2c/busses/i2c-at91.c
+++ linux/drivers/i2c/busses/i2c-at91.c
@@ -279,30 +279,31 @@ static int __devexit at91_i2c_remove(str
 
 /* NOTE: could save a few mA by keeping clock off outside of at91_xfer... */
 
-static int at91_i2c_suspend(struct platform_device *pdev, pm_message_t mesg)
+static int at91_i2c_suspend(struct device *dev)
 {
 	clk_disable(twi_clk);
 	return 0;
 }
 
-static int at91_i2c_resume(struct platform_device *pdev)
+static int at91_i2c_resume(struct device *dev)
 {
 	return clk_enable(twi_clk);
 }
 
+static SIMPLE_DEV_PM_OPS(at91_i2c_pm, at91_i2c_suspend, at91_i2c_resume);
+#define AT91_I2C_PM	(&at91_i2c_pm)
+
 #else
-#define at91_i2c_suspend	NULL
-#define at91_i2c_resume		NULL
+#define AT91_I2C_PM	NULL
 #endif
 
 static struct platform_driver at91_i2c_driver = {
 	.probe		= at91_i2c_probe,
 	.remove		= __devexit_p(at91_i2c_remove),
-	.suspend	= at91_i2c_suspend,
-	.resume		= at91_i2c_resume,
 	.driver		= {
 		.name	= "at91_i2c",
 		.owner	= THIS_MODULE,
+		.pm	= AT91_I2C_PM,
 	},
 };
 

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