linux-kernel - Re: [PATCH v1 2/2] iio: adc: add ADC driver for the TI TSC2046 controller

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Message-ID: <YEVcO/NeKzBsFEdL@google.com>
Date:   Sun, 7 Mar 2021 15:05:31 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        David Jander <david@...tonic.nl>,
        Robin van der Gracht <robin@...tonic.nl>,
        linux-iio@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>
Subject: Re: [PATCH v1 2/2] iio: adc: add ADC driver for the TI TSC2046
 controller

Hi Oleksij,

On Fri, Mar 05, 2021 at 02:38:13PM +0100, Oleksij Rempel wrote:
> +
> +	/* TODO: remove IRQ_NOAUTOEN after needed patches are mainline */
> +	irq_set_status_flags(spi->irq, IRQ_NOAUTOEN);
> +	ret = devm_request_threaded_irq(dev, spi->irq,
> +					NULL,
> +					&tsc2046_adc_irq,
> +					IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> +					name, indio_dev);

I'd recommend dropping IRQF_TRIGGER_LOW and only using IRQF_ONESHOT and
rely on the platform (ACPI, DT) to specify trigger polarity according to
how device is wired in a given system. In general I believe newer
drivers should not specify interrupt triggers themselves.

Thanks.

-- 
Dmitry