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Commit 2dea53bf authored by Jingchang Lu's avatar Jingchang Lu Committed by Greg Kroah-Hartman
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serial: of-serial: add PM suspend/resume support 



This adds PM suspend/resume support for the of-serial driver
to provide power management support on devices attatched to it.

Signed-off-by: default avatarJingchang Lu <jingchang.lu@freescale.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2c8faf3d

drivers/tty/serial/of_serial.c

+27 −0
Original line number Original line Diff line number Diff line
@@ -240,6 +240,32 @@ static int of_platform_serial_remove(struct platform_device *ofdev) 
	return 0;

	return 0;

}

}





#ifdef CONFIG_PM_SLEEP

static int of_serial_suspend(struct device *dev)

{

	struct of_serial_info *info = dev_get_drvdata(dev);



	serial8250_suspend_port(info->line);

	if (info->clk)

		clk_disable_unprepare(info->clk);



	return 0;

}



static int of_serial_resume(struct device *dev)

{

	struct of_serial_info *info = dev_get_drvdata(dev);



	if (info->clk)

		clk_prepare_enable(info->clk);



	serial8250_resume_port(info->line);



	return 0;

}

#endif

static SIMPLE_DEV_PM_OPS(of_serial_pm_ops, of_serial_suspend, of_serial_resume);



/*

/*

 * A few common types, add more as needed.

 * A few common types, add more as needed.

 */

 */
@@ -271,6 +297,7 @@ static struct platform_driver of_platform_serial_driver = { 
		.name = "of_serial",

		.name = "of_serial",

		.owner = THIS_MODULE,

		.owner = THIS_MODULE,

		.of_match_table = of_platform_serial_table,

		.of_match_table = of_platform_serial_table,

		.pm = &of_serial_pm_ops,

	},

	},

	.probe = of_platform_serial_probe,

	.probe = of_platform_serial_probe,

	.remove = of_platform_serial_remove,

	.remove = of_platform_serial_remove,