linux-kernel - Re: [PATCH] Enable async suspend/resume on industrial IO devices

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Date:	Wed, 06 Apr 2011 11:59:10 +0100
From:	Jonathan Cameron <jic23@....ac.uk>
To:	Sonny Rao <sonnyrao@...omium.org>
CC:	linux-pm@...ts.linux-foundation.org, bleung@...omium.org,
	snanda@...omium.org, Greg Kroah-Hartman <gregkh@...e.de>,
	Manuel Stahl <manuel.stahl@....fraunhofer.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Phillip Kurtenbach <pkurtenbach@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>
Subject: Re: [PATCH] Enable async suspend/resume on industrial IO devices

On 04/06/11 03:45, Sonny Rao wrote:
> Industrial I/O devices can sometimes take a long time to resume,
> allowing them to be asynchronus saves 50ms on one light sensor
> 
Hi Sonny,

cc'd linux-iio

I'm not particularly familiar with this.  Are there any disadvantages?
I just wonder if it would be better to push this into individual drivers
rather than the core?

Jonathan
> Signed-off-by: Sonny Rao <sonnyrao@...omium.org>
> 
> ---
>  drivers/staging/iio/industrialio-core.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
> index 768f448..a4b099f 100644
> --- a/drivers/staging/iio/industrialio-core.c
> +++ b/drivers/staging/iio/industrialio-core.c
> @@ -811,6 +811,8 @@ int iio_device_register(struct iio_dev *dev_info)
>  	if (dev_info->modes & INDIO_RING_TRIGGERED)
>  		iio_device_register_trigger_consumer(dev_info);
>  
> +	device_enable_async_suspend(&dev_info->dev);
> +
>  	return 0;
>  
>  error_free_sysfs:

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