Commit 593e9d70 authored by Sundar Iyer's avatar Sundar Iyer Committed by Linus Walleij
Browse files

mfd/tc3589x: add suspend/resume support 



Acked-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarSundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
parent 523bc382

drivers/mfd/tc3589x.c

+37 −0
Original line number Diff line number Diff line
@@ -14,6 +14,9 @@ 
#include <linux/mfd/core.h>

#include <linux/mfd/tc3589x.h>



#define TC3589x_CLKMODE_MODCTL_SLEEP		0x0

#define TC3589x_CLKMODE_MODCTL_OPERATION	(1 << 0)



/**

 * tc3589x_reg_read() - read a single TC3589x register

 * @tc3589x:	Device to read from
@@ -339,6 +342,37 @@ static int __devexit tc3589x_remove(struct i2c_client *client) 
	return 0;

}



static int tc3589x_suspend(struct device *dev)

{

	struct tc3589x *tc3589x = dev_get_drvdata(dev);

	struct i2c_client *client = tc3589x->i2c;

	int ret = 0;



	/* put the system to sleep mode */

	if (!device_may_wakeup(&client->dev))

		ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,

				TC3589x_CLKMODE_MODCTL_SLEEP);



	return ret;

}



static int tc3589x_resume(struct device *dev)

{

	struct tc3589x *tc3589x = dev_get_drvdata(dev);

	struct i2c_client *client = tc3589x->i2c;

	int ret = 0;



	/* enable the system into operation */

	if (!device_may_wakeup(&client->dev))

		ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,

				TC3589x_CLKMODE_MODCTL_OPERATION);



	return ret;

}



static const SIMPLE_DEV_PM_OPS(tc3589x_dev_pm_ops, tc3589x_suspend,

						tc3589x_resume);



static const struct i2c_device_id tc3589x_id[] = {

	{ "tc3589x", 24 },

	{ }
@@ -348,6 +382,9 @@ MODULE_DEVICE_TABLE(i2c, tc3589x_id); 
static struct i2c_driver tc3589x_driver = {

	.driver.name	= "tc3589x",

	.driver.owner	= THIS_MODULE,

#ifdef CONFIG_PM

	.driver.pm	= &tc3589x_dev_pm_ops,

#endif

	.probe		= tc3589x_probe,

	.remove		= __devexit_p(tc3589x_remove),

	.id_table	= tc3589x_id,