linux-kernel - Re: [PATCH v5 06/20] mfd: axp20x: Allow AXP chips without interrupt lines

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Message-ID: <20210128101544.yyvrguk2jlgr4uwo@gilmour>
Date:   Thu, 28 Jan 2021 11:15:44 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Samuel Holland <samuel@...lland.org>,
        Icenowy Zheng <icenowy@...c.io>, Rob Herring <robh@...nel.org>,
        Clément Péron <peron.clem@...il.com>,
        Shuosheng Huang <huangshuosheng@...winnertech.com>,
        Yangtao Li <tiny.windzz@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH v5 06/20] mfd: axp20x: Allow AXP chips without interrupt
 lines

On Wed, Jan 27, 2021 at 05:24:46PM +0000, Andre Przywara wrote:
> Currently the AXP chip requires to have its IRQ line connected to some
> interrupt controller, and will fail probing when this is not the case.
> 
> On a new Allwinner SoC (H616) there is no NMI pin anymore, and at
> least one board does not connect the AXP's IRQ pin to anything else,
> so the interrupt functionality of the AXP chip is simply not available.
> 
> Check whether the interrupt line number returned by the platform code is
> valid, before trying to register the irqchip. If not, we skip this
> registration, to avoid the driver to bail out completely.
> 
> Signed-off-by: Andre Przywara <andre.przywara@....com>

Acked-by: Maxime Ripard <mripard@...nel.org>

Maxime

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