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Subject[PATCH 13/20] mfd/tc3589x: add suspend/resume support
Date
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
---
drivers/mfd/tc3589x.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c
index fd206fd..a7dd2b6 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
@@ -365,6 +368,42 @@ static int __devexit tc3589x_remove(struct i2c_client *client)
return 0;
}

+#ifdef CONFIG_PM
+static int tc3589x_suspend(struct device *dev)
+{
+ struct tc3589x *tc35892 = 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 struct dev_pm_ops tc3589x_dev_pm_ops = {
+ .suspend = tc3589x_suspend,
+ .resume = tc3589x_resume,
+};
+#endif
+
static const struct i2c_device_id tc3589x_id[] = {
{ "tc3589x", 24 },
{ }
@@ -374,6 +413,9 @@ 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,
--
1.7.2.dirty


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