From: <gregkh@linuxfoundation.org>
To: alexandre.belloni@free-electrons.com,
alexander.levin@verizon.com, gregkh@linuxfoundation.org,
ludovic.desroches@microchip.com, wsa@the-dreams.de
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "i2c: at91: ensure state is restored after suspending" has been added to the 4.9-stable tree
Date: Thu, 19 Oct 2017 15:14:17 +0200 [thread overview]
Message-ID: <150841885735147@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
i2c: at91: ensure state is restored after suspending
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i2c-at91-ensure-state-is-restored-after-suspending.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Thu Oct 19 15:04:02 CEST 2017
From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Thu, 16 Feb 2017 18:27:59 +0100
Subject: i2c: at91: ensure state is restored after suspending
From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
[ Upstream commit e3ccc921b7d8fd1fcd10a00720e09823d8078666 ]
When going to suspend, the I2C registers may be lost because the power to
VDDcore is cut. Restore them when resuming.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/i2c/busses/i2c-at91.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -1180,6 +1180,7 @@ static int at91_twi_suspend_noirq(struct
static int at91_twi_resume_noirq(struct device *dev)
{
+ struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);
int ret;
if (!pm_runtime_status_suspended(dev)) {
@@ -1191,6 +1192,8 @@ static int at91_twi_resume_noirq(struct
pm_runtime_mark_last_busy(dev);
pm_request_autosuspend(dev);
+ at91_init_twi_bus(twi_dev);
+
return 0;
}
Patches currently in stable-queue which might be from alexandre.belloni@free-electrons.com are
queue-4.9/i2c-at91-ensure-state-is-restored-after-suspending.patch
reply other threads:[~2017-10-19 13:14 UTC|newest]
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