From 593e9d70fb0f1ece1cf2a61c701dec35d8e41f8d Mon Sep 17 00:00:00 2001 From: Sundar Iyer Date: Mon, 13 Dec 2010 09:33:18 +0530 Subject: [PATCH] mfd/tc3589x: add suspend/resume support Acked-by: Samuel Ortiz Signed-off-by: Sundar Iyer Signed-off-by: Linus Walleij --- drivers/mfd/tc3589x.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index f000d2ed23e0..32291fe4151c 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -14,6 +14,9 @@ #include #include +#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,