linux-kernel - Re: [PATCH 1/1] regmap-irq: Introduce inverted status registers support

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Message-ID: <20210518120640.GB4358@sirena.org.uk>
Date:   Tue, 18 May 2021 13:06:40 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Maxim Kochetkov <fido_max@...ox.ru>
Cc:     linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
        rafael@...nel.org
Subject: Re: [PATCH 1/1] regmap-irq: Introduce inverted status registers
 support

On Tue, May 18, 2021 at 12:44:41PM +0300, Maxim Kochetkov wrote:

> +	if (chip->status_invert)
> +		for (i = 0; i < data->chip->num_regs; i++)
> +			data->status_buf[i] = ~data->status_buf[i];
> +

This is the only active change so this only affects readback meaning
that if both read and write are inverted this won't do what's expected,
breaking acks.  I'm guessing your device either mixes things or is clear
on read?

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