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Date:   Wed, 29 Jul 2020 09:55:13 +0200
From:   Marco Felsch <m.felsch@pengutronix.de>
To:     Horia =?utf-8?Q?Geant=C4=83?= <horia.geanta@nxp.com>
Cc:     Herbert Xu <herbert@gondor.apana.org.au>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Rob Herring <robh+dt@kernel.org>,
        Shawn Guo <shawnguo@kernel.org>,
        =?iso-8859-1?Q?Andr=E9?= Draszik <git@andred.net>,
        Robin Gong <yibin.gong@nxp.com>,
        Anson Huang <anson.huang@nxp.com>,
        Fabio Estevam <festevam@gmail.com>,
        Aymen Sghaier <aymen.sghaier@nxp.com>,
        Adam Ford <aford173@gmail.com>, linux-input@vger.kernel.org,
        linux-crypto@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>
Subject: Re: [PATCH v3 3/3] Input: snvs_pwrkey - only IRQ_HANDLED for our own
 events
Message-ID: <20200729075513.ckjnhfv3dxuesvsi@pengutronix.de>
References: <20200723074314.3304-1-horia.geanta@nxp.com>
 <20200723074314.3304-4-horia.geanta@nxp.com>
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Hi,

On 20-07-23 10:43, Horia Geantă wrote:
> From: André Draszik <git@andred.net>
> 
> The snvs_pwrkey shares the SNVS LPSR status register with the snvs_rtc.
> 
> This driver here should only return IRQ_HANDLED if the status register
> indicates that the event we're handling in the irq handler was genuinely
> intended for this driver. Otheriwse the interrupt subsystem will
> assume the interrupt was handled successfully even though it wasn't
> at all.

After checking the RM and the imx6qdl.dtsi I'm not very sure that this
is right since the snvs-powerkey has a seperate irq-line. So we can be
sure that this irq is for us. If this is the case we don't need to check
the SNVS_LPSR_REG instead we only need to clear it.

Regards,
  Marco