linux-kernel - [PATCH can-next v3 0/3] can: tcan4x5x/m_can: use standby mode when down and in suspend

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Message-Id: <20241122-tcan-standby-v3-0-90bafaf5eccd@geanix.com>
Date: Fri, 22 Nov 2024 15:52:21 +0100
From: Sean Nyekjaer <sean@...nix.com>
To: Chandrasekar Ramakrishnan <rcsekar@...sung.com>, 
 Marc Kleine-Budde <mkl@...gutronix.de>, 
 Vincent Mailhol <mailhol.vincent@...adoo.fr>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: linux-can@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Sean Nyekjaer <sean@...nix.com>
Subject: [PATCH can-next v3 0/3] can: tcan4x5x/m_can: use standby mode when
 down and in suspend

When downing the tcan4x5x there is no reason to keep the tcan4x5x in
"normal" mode and waste power.
So set standby mode when the interface is down and normal mode when
interface is up.

Also when going into suspend, set the tcan4x5x into standby mode. The
tcan4x5x can still be used as a wake-source when in standby as low power
rx is enabled.

Signed-off-by: Sean Nyekjaer <sean@...nix.com>
---
Changes in v3:
- Run deinit in m_can_stop() in any case even if m_can_cccr_update_bits() fails
- Link to v2: https://lore.kernel.org/r/20241115-tcan-standby-v2-0-4eb02026b237@geanix.com

Changes in v2:
- Reduced code in tcan4x5x_deinit()
- Taken care of return values from deinit callback
- Link to v1: https://lore.kernel.org/r/20241111-tcan-standby-v1-0-f9337ebaceea@geanix.com

---
Sean Nyekjaer (3):
      can: m_can: add deinit callback
      can: tcan4x5x: add deinit callback to set standby mode
      can: m_can: call deinit/init callback when going into suspend/resume

 drivers/net/can/m_can/m_can.c         | 22 ++++++++++++++++++----
 drivers/net/can/m_can/m_can.h         |  1 +
 drivers/net/can/m_can/tcan4x5x-core.c |  9 +++++++++
 3 files changed, 28 insertions(+), 4 deletions(-)
---
base-commit: e0b741bc53c94f9ae25d4140202557a0aa51b5a0
change-id: 20241107-tcan-standby-def358771b2b

Best regards,
-- 
Sean Nyekjaer <sean@...nix.com>