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

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Date:	Mon, 16 Nov 2015 23:26:48 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	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 device to suspend/resume asynchronously


Hi,

Any comments are welcome.


Thanks,
Zhonghui



On 9/24/2015 2:26 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 device 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 |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index 5f89f1e..74e322b 100644
> --- a/drivers/i2c/i2c-core.c
> +++ b/drivers/i2c/i2c-core.c
> @@ -1036,6 +1036,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
>  	client->dev.of_node = info->of_node;
>  	client->dev.fwnode = info->fwnode;
>  
> +	device_enable_async_suspend(&client->dev);
>  	i2c_dev_set_name(adap, client);
>  	status = device_register(&client->dev);
>  	if (status)
> -- 1.7.1
>

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