linux-kernel - Re: [PATCH v4 4/6] iio: imu: kmx61: Add PM sleep support

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Date:	Fri, 12 Dec 2014 13:45:27 +0000
From:	Jonathan Cameron <jic23@...nel.org>
To:	Daniel Baluta <daniel.baluta@...el.com>, pmeerw@...erw.net,
	srinivas.pandruvada@...ux.intel.com, knaack.h@....de
CC:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/6] iio: imu: kmx61: Add PM sleep support

On 03/12/14 13:31, Daniel Baluta wrote:
> Per sensor state (ACTIVE/STANDBY) is saved in driver's
> private data (acc_stby/mag_stby) and restored when
> resume is called.
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@...el.com>
applied.
> ---
>  drivers/iio/imu/kmx61.c | 29 +++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c
> index 7536043..f69ae5a7 100644
> --- a/drivers/iio/imu/kmx61.c
> +++ b/drivers/iio/imu/kmx61.c
> @@ -16,6 +16,7 @@
>  #include <linux/acpi.h>
>  #include <linux/gpio/consumer.h>
>  #include <linux/interrupt.h>
> +#include <linux/pm.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/iio/iio.h>
>  #include <linux/iio/sysfs.h>
> @@ -796,6 +797,33 @@ static int kmx61_remove(struct i2c_client *client)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_PM_SLEEP
> +static int kmx61_suspend(struct device *dev)
> +{
> +	int ret;
> +	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
> +
> +	mutex_lock(&data->lock);
> +	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
> +			     false);
> +	mutex_unlock(&data->lock);
> +
> +	return ret;
> +}
> +
> +static int kmx61_resume(struct device *dev)
> +{
> +	u8 stby = 0;
> +	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
> +
> +	if (data->acc_stby)
> +		stby |= KMX61_ACC_STBY_BIT;
> +	if (data->mag_stby)
> +		stby |= KMX61_MAG_STBY_BIT;
> +
> +	return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
> +}
> +#endif
>  
>  #ifdef CONFIG_PM_RUNTIME
>  static int kmx61_runtime_suspend(struct device *dev)
> @@ -825,6 +853,7 @@ static int kmx61_runtime_resume(struct device *dev)
>  #endif
>  
>  static const struct dev_pm_ops kmx61_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume)
>  	SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL)
>  };
>  
> 

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