linux-kernel - Re: [PATCH v6 02/17] mfd: axp20x: Allow AXP 806 chips without interrupt lines

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Message-ID: <20210519150138.GK2549456@dell>
Date:   Wed, 19 May 2021 16:01:38 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Rob Herring <robh@...nel.org>, Icenowy Zheng <icenowy@...c.io>,
        Samuel Holland <samuel@...lland.org>,
        Ondrej Jirman <megous@...ous.com>,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 02/17] mfd: axp20x: Allow AXP 806 chips without
 interrupt lines

On Wed, 19 May 2021, 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.
> Also we need to skip the power key functionality, as this relies on
> a valid IRQ as well.
> 
> Signed-off-by: Andre Przywara <andre.przywara@....com>
> ---
>  drivers/mfd/axp20x.c | 24 +++++++++++++++++-------
>  1 file changed, 17 insertions(+), 7 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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