linux-kernel - [PATCH 04/07] i2c: rework i2c-pxa suspend_late()/resume

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Message-Id: <20090624092342.14276.2946.sendpatchset@rx1.opensource.se>
Date:	Wed, 24 Jun 2009 18:23:42 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	gregkh@...e.de, pavel@....cz, hskinnemoen@...el.com,
	anemo@....ocn.ne.jp, linux-usb@...r.kernel.org, rjw@...k.pl,
	stern@...land.harvard.edu, ben-linux@...ff.org,
	linux-pm@...ts.linux-foundation.org, akpm@...ux-foundation.org,
	linux-omap@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>,
	felipe.balbi@...ia.com
Subject: [PATCH 04/07] i2c: rework i2c-pxa suspend_late()/resume_early()

From: Magnus Damm <damm@...l.co.jp>

This patch reworks platform driver power management code
for i2c-pxa from legacy late/early callbacks to dev_pm_ops.

The callbacks are converted for CONFIG_SUSPEND like this:
  suspend_late() -> suspend_noirq()
  resume_early() -> resume_noirq()

Signed-off-by: Magnus Damm <damm@...l.co.jp>
---

 Untested but compiles fine.

 drivers/i2c/busses/i2c-pxa.c |   25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

--- 0001/drivers/i2c/busses/i2c-pxa.c
+++ work/drivers/i2c/busses/i2c-pxa.c	2009-06-01 15:26:06.000000000 +0900
@@ -1135,35 +1135,44 @@ static int __exit i2c_pxa_remove(struct 
 }
 
 #ifdef CONFIG_PM
-static int i2c_pxa_suspend_late(struct platform_device *dev, pm_message_t state)
+static int i2c_pxa_suspend_noirq(struct device *dev)
 {
-	struct pxa_i2c *i2c = platform_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct pxa_i2c *i2c = platform_get_drvdata(pdev);
+
 	clk_disable(i2c->clk);
+
 	return 0;
 }
 
-static int i2c_pxa_resume_early(struct platform_device *dev)
+static int i2c_pxa_resume_noirq(struct device *dev)
 {
-	struct pxa_i2c *i2c = platform_get_drvdata(dev);
+	struct platform_device *pdev = to_platform_device(dev);
+	struct pxa_i2c *i2c = platform_get_drvdata(pdev);
 
 	clk_enable(i2c->clk);
 	i2c_pxa_reset(i2c);
 
 	return 0;
 }
+
+static struct dev_pm_ops i2c_pxa_dev_pm_ops = {
+	.suspend_noirq = i2c_pxa_suspend_noirq,
+	.resume_noirq = i2c_pxa_resume_noirq,
+};
+
+#define I2C_PXA_DEV_PM_OPS (&i2c_pxa_dev_pm_ops)
 #else
-#define i2c_pxa_suspend_late NULL
-#define i2c_pxa_resume_early NULL
+#define I2C_PXA_DEV_PM_OPS NULL
 #endif
 
 static struct platform_driver i2c_pxa_driver = {
 	.probe		= i2c_pxa_probe,
 	.remove		= __exit_p(i2c_pxa_remove),
-	.suspend_late	= i2c_pxa_suspend_late,
-	.resume_early	= i2c_pxa_resume_early,
 	.driver		= {
 		.name	= "pxa2xx-i2c",
 		.owner	= THIS_MODULE,
+		.pm	= I2C_PXA_DEV_PM_OPS,
 	},
 	.id_table	= i2c_pxa_id_table,
 };
--
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