This patch is to support PM of the si470x i2c driver.
Signed-off-by: Joonyoung Shim <jy0922.s...@samsung.com>
---
drivers/media/radio/si470x/radio-si470x-i2c.c | 40 +++++++++++++++++++++++++
1 files changed, 40 insertions(+), 0 deletions(-)
diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c
b/drivers/media/radio/si470x/radio-si470x-i2c.c
index 77532e6..4c6e586 100644
--- a/drivers/media/radio/si470x/radio-si470x-i2c.c
+++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
@@ -486,6 +486,44 @@ static __devexit int si470x_i2c_remove(struct i2c_client
*client)
}
+#ifdef CONFIG_PM
+/*
+ * si470x_i2c_suspend - suspend the device
+ */
+static int si470x_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ struct si470x_device *radio = i2c_get_clientdata(client);
+
+ /* power down */
+ radio->registers[POWERCFG] |= POWERCFG_DISABLE;
+ if (si470x_set_register(radio, POWERCFG) < 0)
+ return -EIO;
+
+ return 0;
+}
+
+
+/*
+ * si470x_i2c_resume - resume the device
+ */
+static int si470x_i2c_resume(struct i2c_client *client)
+{
+ struct si470x_device *radio = i2c_get_clientdata(client);
+
+ /* power up : need 110ms */
+ radio->registers[POWERCFG] |= POWERCFG_ENABLE;
+ if (si470x_set_register(radio, POWERCFG) < 0)
+ return -EIO;
+ msleep(110);
+
+ return 0;
+}
+#else
+#define si470x_i2c_suspend NULL
+#define si470x_i2c_resume NULL
+#endif
+
+
/*
* si470x_i2c_driver - i2c driver interface
*/
@@ -496,6 +534,8 @@ static struct i2c_driver si470x_i2c_driver = {
},
.probe = si470x_i2c_probe,
.remove = __devexit_p(si470x_i2c_remove),
+ .suspend = si470x_i2c_suspend,
+ .resume = si470x_i2c_resume,
.id_table = si470x_i2c_id,
};
--
1.6.3.3
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