linux-kernel - Re: [PATCH v2] i2c: enable i2c adapter to suspend/resume asynchronously

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Date:	Mon, 16 Nov 2015 23:37:32 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	wsa@...-dreams.de, wsa@...-dreams.de, jarkko.nikula@...el.com,
	mika.westerberg@...el.com
CC:	linux-i2c@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] i2c: enable i2c adapter to suspend/resume asynchronously


Any comments are welcome.


Thanks,
Zhonghui



On 9/24/2015 2:50 PM, Fu, Zhonghui wrote:
> Now, PM core supports asynchronous suspend/resume mode for devices
> during system suspend/resume, and the power state transition of one
> device may be completed in separate kernel thread. PM core ensures
> all power state transition timing dependency between devices. This
> patch enables i2c adapter to suspend/resume asynchronously. This
> will take advantage of multicore and improve system suspend/resume
> speed.
>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@...ux.intel.com>
> ---
> Changes in v2:
> - Amend commit message.
>
>  drivers/i2c/i2c-core.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index 5f89f1e..c273b55 100644
> --- a/drivers/i2c/i2c-core.c
> +++ b/drivers/i2c/i2c-core.c
> @@ -1528,6 +1528,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
>  
>  	pm_runtime_no_callbacks(&adap->dev);
>  
> +	device_enable_async_suspend(&adap->dev);
> +
>  #ifdef CONFIG_I2C_COMPAT
>  	res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev,
>  				       adap->dev.parent);
> -- 1.7.1
>

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