From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Subject: Re: [PATCH 5/7] PM: i2c-designware-platdrv: Use
 DPM_FLAG_SMART_PREPARE
Date: Mon, 8 Jan 2018 16:31:49 +0200
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To: "Rafael J. Wysocki" <rjw@rjwysocki.net>, Linux PM <linux-pm@vger.kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Alan Stern <stern@rowland.harvard.edu>, Kevin Hilman <khilman@kernel.org>, LKML <linux-kernel@vger.kernel.org>, Mika Westerberg <mika.westerberg@linux.intel.com>, Ulf Hansson <ulf.hansson@linaro.org>, linux-i2c <linux-i2c@vger.kernel.org>, Linux PCI <linux-pci@vger.kernel.org>, Lee Jones <lee.jones@linaro.org>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Wolfram Sang <wsa@the-dreams.de>
List-Id: linux-i2c@vger.kernel.org

On 01/03/2018 02:35 AM, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> Modify i2c-designware-platdrv to set DPM_FLAG_SMART_PREPARE for its
> devices and return 0 from the system suspend ->prepare callback
> if the device has an ACPI companion object in order to tell the PM
> core and middle layers to avoid skipping system suspend/resume
> callbacks for the device in that case (which may be problematic,
> because the device may be accessed during suspend and resume of
> other devices via I2C operation regions then).
> 
> Also the pm_runtime_suspended() check in dw_i2c_plat_prepare()
> is not necessary any more, because the core does it when setting
> power.direct_complete for the device, so drop it.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>   drivers/i2c/busses/i2c-designware-platdrv.c |   10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
> 
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>