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Date: Wed, 31 May 2023 07:30:40 +0300
From: Tony Lindgren <tony@atomide.com>
To: Judith Mendez <jm@ti.com>
Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>,
	linux-can@vger.kernel.org, Wolfgang Grandegger <wg@grandegger.com>,
	Marc Kleine-Budde <mkl@pengutronix.de>,
	"David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Schuyler Patton <spatton@ti.com>, Tero Kristo <kristo@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	devicetree@vger.kernel.org,
	Oliver Hartkopp <socketcan@hartkopp.net>,
	Simon Horman <simon.horman@corigine.com>,
	Conor Dooley <conor+dt@linaro.org>
Subject: Re: [PATCH v8 2/2] can: m_can: Add hrtimer to generate software
 interrupt
Message-ID: <20230531043040.GQ14287@atomide.com>
References: <20230530224820.303619-1-jm@ti.com>
 <20230530224820.303619-3-jm@ti.com>
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* Judith Mendez <jm@ti.com> [230530 22:48]:
> Introduce timer polling method to MCAN since some SoCs may not
> have M_CAN interrupt routed to A53 Linux and do not have
> interrupt property in device tree M_CAN node.
> 
> On AM62x SoC, MCANs on MCU domain do not have hardware interrupt
> routed to A53 Linux, instead they will use timer polling method.
> 
> Add an hrtimer to MCAN class device. Each MCAN will have its own
> hrtimer instantiated if there is no hardware interrupt found in
> device tree M_CAN node. The timer will generate a software
> interrupt every 1 ms. In hrtimer callback, we check if there is
> a transaction pending by reading a register, then process by
> calling the isr if there is.

Reviewed-by: Tony Lindgren <tony@atomide.com>