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authorSundar Iyer <sundar.iyer@stericsson.com>2010-12-13 07:03:18 +0300
committerLinus Walleij <linus.walleij@stericsson.com>2010-12-19 21:27:58 +0300
commit593e9d70fb0f1ece1cf2a61c701dec35d8e41f8d (patch)
tree0fecc8bfc55d9796cee7d76cef954d6117ca9c15 /drivers/mfd/tc3589x.c
parent523bc3820f023169671e9726b8dc075669d14bec (diff)
downloadlinux-593e9d70fb0f1ece1cf2a61c701dec35d8e41f8d.tar.xz
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>
Diffstat (limited to 'drivers/mfd/tc3589x.c')
-rw-r--r--drivers/mfd/tc3589x.c37
1 files changed, 37 insertions, 0 deletions
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 <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,