diff options
| -rw-r--r-- | drivers/mfd/tc3589x.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index f000d2ed23e..32291fe4151 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -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, |