linux-kernel - Re: [PATCH v4 2/2] irqchip: add J-Core AIC driver

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Message-ID: <20160727101537.GD12880@leverpostej>
Date:	Wed, 27 Jul 2016 11:15:38 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Rich Felker <dalias@...c.org>
Cc:	linux-kernel@...r.kernel.org, linux-sh@...r.kernel.org,
	devicetree@...r.kernel.org, Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v4 2/2] irqchip: add J-Core AIC driver

On Wed, Jul 27, 2016 at 05:35:09AM +0000, Rich Felker wrote:
> For simplicity, there is no aic1-specific logic in the driver beyond
> setting the priority register, which is necessary for interrupts to
> work at all. Eventually aic1 will likely be phased out, but it's
> currently in use in deployments and all released bitstream binaries.

[...]

> +	if (!of_device_is_compatible(node, "jcore,aic2")) {

If this is only meant to run for AIC1, it would be better to check for
the "jcore,aic1" compatible string explicitly.

While that shouldn't matter much currently, it better matches the intent
described in the commit message, and avoids surprises and/or churn in
future if you have AIC3+.

Mark.

> +IRQCHIP_DECLARE(jcore_aic2, "jcore,aic2", aic_irq_of_init);
> +IRQCHIP_DECLARE(jcore_aic1, "jcore,aic1", aic_irq_of_init);
> -- 
> 2.8.1
>