[PATCH v2 3/3] radio-si470x: support PM functions

[PATCH v2 3/3] radio-si470x: support PM functions

[Joonyoung Shim]

This patch is to support PM of the si470x i2c driver.

Signed-off-by: Joonyoung Shim <jy0922.shim@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

Re: [PATCH v2 3/3] radio-si470x: support PM functions

[Tobias Lorenz]

Hi,

the same here. I'm unable to test it, but it compiles cleanly.

Acked-by: Tobias Lorenz <tobias.lorenz@gmx.net>

Bye,
Toby

Am Donnerstag 03 Dezember 2009 13:57:29 schrieb Joonyoung Shim:
> This patch is to support PM of the si470x i2c driver.
> 
> Signed-off-by: Joonyoung Shim <jy0922.shim@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,
>  };
>  
>