linux-kernel - [PATCH 0/2] Wakeup the i2c-omap controller during suspend stage

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Message-Id: <20240613-i2c-omap-wakeup-controller-during-suspend-v1-0-aab001eb1ad1@bootlin.com>
Date: Thu, 13 Jun 2024 15:13:26 +0200
From: Thomas Richard <thomas.richard@...tlin.com>
To: Vignesh R <vigneshr@...com>, Aaro Koskinen <aaro.koskinen@....fi>, 
 Janusz Krzysztofik <jmkrzyszt@...il.com>, Tony Lindgren <tony@...mide.com>, 
 Andi Shyti <andi.shyti@...nel.org>
Cc: linux-omap@...r.kernel.org, linux-i2c@...r.kernel.org, 
 linux-kernel@...r.kernel.org, gregory.clement@...tlin.com, 
 theo.lebrun@...tlin.com, thomas.petazzoni@...tlin.com, u-kumar1@...com, 
 Thomas Richard <thomas.richard@...tlin.com>, 
 Wolfram Sang <wsa+renesas@...g-engineering.com>
Subject: [PATCH 0/2] Wakeup the i2c-omap controller during suspend stage

The patches of this series were originally in the series "Add suspend to
ram support for PCIe on J7200" [1].
There is no changes compared to the patches in the series [1].

The goal is to wakeup the controller during the suspend stage to be able
to use it during suspend_noirq stage.
As autosuspend is enabled, the controller can be suspended at suspend_noirq
stage. But runtime pm is disabled in suspend_late stage. So it's not
possible to wakeup the controller during suspend_noirq.
The trick is to force the wakeup of the controller during suspend stage.

[1] https://lore.kernel.org/all/20240102-j7200-pcie-s2r-v6-0-4656ef6e6d66@bootlin.com/

Signed-off-by: Thomas Richard <thomas.richard@...tlin.com>
---
Thomas Richard (2):
      i2c: omap: switch to NOIRQ_SYSTEM_SLEEP_PM_OPS() and RUNTIME_PM_OPS()
      i2c: omap: wakeup the controller during suspend() callback

 drivers/i2c/busses/i2c-omap.c | 36 +++++++++++++++++++++++++++++-------
 1 file changed, 29 insertions(+), 7 deletions(-)
---
base-commit: 0719fea199617c798ad3a9158916066ac17219b2
change-id: 20240613-i2c-omap-wakeup-controller-during-suspend-895adf95a005

Best regards,
-- 
Thomas Richard <thomas.richard@...tlin.com>