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Message-ID: <20240523075347.1282395-1-msp@baylibre.com>
Date: Thu, 23 May 2024 09:53:40 +0200
From: Markus Schneider-Pargmann <msp@...libre.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>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Nishanth Menon <nm@...com>,
Vignesh Raghavendra <vigneshr@...com>,
Tero Kristo <kristo@...nel.org>
Cc: Vibhore Vardhan <vibhore@...com>,
Kevin Hilman <khilman@...libre.com>,
Dhruva Gole <d-gole@...com>,
Martin Hundebøll <martin@...nix.com>,
Simon Horman <horms@...nel.org>,
linux-can@...r.kernel.org,
netdev@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Markus Schneider-Pargmann <msp@...libre.com>
Subject: [PATCH 0/7] can: m_can: Add am62 wakeup support
Hi,
am62, am62a and am62p support Partial-IO, a poweroff SoC state with a
few pin groups being active for wakeup.
To support mcu_mcan0 and mcu_mcan1 wakeup for the mentioned SoCs, the
series introduces a notion of wake-on-lan for m_can. If the user decides
to enable wake-on-lan for a m_can device, the device is set to wakeup
enabled. A 'wakeup' pinctrl state is selected to enable wakeup flags for
the relevant pins. If wake-on-lan is disabled the default pinctrl is
selected.
It is based on v6.9-rc1.
This series is part of a bigger topic to support Partial-IO on am62,
am62a and am62p. Partial-IO is a poweroff state in which some pins are
able to wakeup the SoC. In detail MCU m_can and two serial port pins can
trigger the wakeup.
These two other series are relevant for the support of Partial-IO:
- firmware: ti_sci: Partial-IO support
- serial: 8250: omap: Add am62 wakeup support
A test branch is available here that includes all patches required to
test Partial-IO:
https://gitlab.baylibre.com/msp8/linux/-/tree/integration/am62-lp-sk-partialio/v6.9?ref_type=heads
After enabling Wake-on-LAN the system can be powered off and will enter
the Partial-IO state in which it can be woken up by activity on the
specific pins:
ethtool -s can0 wol p
ethtool -s can1 wol p
poweroff
I tested these patches on am62-lp-sk.
Best,
Markus
Markus Schneider-Pargmann (6):
dt-bindings: can: m_can: Add wakeup-source property
dt-bindings: can: m_can: Add wakeup pinctrl state
can: m_can: Map WoL to device_set_wakeup_enable
can: m_can: Support pinctrl wakeup state
arm64: dts: ti: k3-am62: Mark mcu_mcan0/1 as wakeup-source
arm64: dts: ti: k3-am62a-mcu: Mark mcu_mcan0/1 as wakeup-source
Vibhore Vardhan (1):
arm64: dts: ti: k3-am62p-mcu: Mark mcu_mcan0/1 as wakeup-source
.../bindings/net/can/bosch,m_can.yaml | 20 +++++++++
arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi | 2 +
arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi | 2 +
arch/arm64/boot/dts/ti/k3-am62p-mcu.dtsi | 2 +
drivers/net/can/m_can/m_can.c | 43 +++++++++++++++++++
drivers/net/can/m_can/m_can.h | 4 ++
6 files changed, 73 insertions(+)
--
2.43.0
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