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mfd/tc3589x: add suspend/resume support 

Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
This commit is contained in:
Sundar Iyer 2010-12-13 09:33:18 +05:30 committed by Linus Walleij
parent 523bc3820f
commit 593e9d70fb
1 changed files with 37 additions and 0 deletions
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37
drivers/mfd/tc3589x.c
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@ -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,