linux-kernel - Re: [PATCH can-next] can: m_can: add support for optional reset

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Message-ID: <20251008-sweet-quartz-sambar-d0674c-mkl@pengutronix.de>
Date: Wed, 8 Oct 2025 12:26:04 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Chandrasekar Ramakrishnan <rcsekar@...sung.com>, 
	Vincent Mailhol <mailhol@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-can@...r.kernel.org, linux-kernel@...r.kernel.org, 
	kernel@...gutronix.de, Markus Schneider-Pargmann <msp@...libre.com>
Subject: Re: [PATCH can-next] can: m_can: add support for optional reset

On 08.10.2025 11:38:30, Marc Kleine-Budde wrote:
> This patch has been split from the original series [1].
> 
> In some SoCs (observed on the STM32MP15) the M_CAN IP core keeps the CAN
> state and CAN error counters over an internal reset cycle. The STM32MP15
> SoC provides an external reset, which is shared between both M_CAN cores.
> 
> Add support for an optional external reset. Take care of shared resets,
> de-assert reset during the probe phase in m_can_class_register() and while
> the interface is up, assert the reset otherwise.
> 
> [1] https://lore.kernel.org/all/20250923-m_can-fix-state-handling-v3-0-06d8baccadbf@pengutronix.de
> 
> Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
> Reviewed-by: Markus Schneider-Pargmann <msp@...libre.com>
> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>

Added to linux-can-next.

Marc

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