Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
References: <20220620200644.1961936-1-aidanmacdonald.0x0@gmail.com>
 <20220620200644.1961936-18-aidanmacdonald.0x0@gmail.com>
 <CAHp75VcN0hf5_AVB-aRBhyvwuojuDC=FbBUqWpUWQR=r=zSRPA@mail.gmail.com>
From:   Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
To:     Andy Shevchenko <andy.shevchenko@gmail.com>
Cc:     Mark Brown <broonie@kernel.org>, Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Banajit Goswami <bgoswami@codeaurora.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        MyungJoo Ham <myungjoo.ham@samsung.com>,
        Michael Walle <michael@walle.cc>,
        Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Thomas Gleixner <tglx@linutronix.de>,
        Marc Zyngier <maz@kernel.org>,
        Lee Jones <lee.jones@linaro.org>,
        Manivannan Sadhasivam <mani@kernel.org>,
        Cristian Ciocaltea <cristian.ciocaltea@gmail.com>,
        Chen-Yu Tsai <wens@csie.org>, tharvey@gateworks.com,
        rjones@gateworks.com, Matti Vaittinen <mazziesaccount@gmail.com>,
        orsonzhai@gmail.com, baolin.wang7@gmail.com, zhang.lyra@gmail.com,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Samuel Holland <samuel@sholland.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        linux-actions@lists.infradead.org,
        linux-arm-msm <linux-arm-msm@vger.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
        linux-sunxi@lists.linux.dev,
        ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: [PATCH 17/49] regmap-irq: Add broken_mask_unmask flag
In-reply-to: <CAHp75VcN0hf5_AVB-aRBhyvwuojuDC=FbBUqWpUWQR=r=zSRPA@mail.gmail.com>
Date:   Tue, 21 Jun 2022 22:07:24 +0100
Message-ID: <6DVb6JaRd4bhUPBIyfXXiqm668jAPyls@localhost>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk


Andy Shevchenko <andy.shevchenko@gmail.com> writes:

> On Mon, Jun 20, 2022 at 10:08 PM Aidan MacDonald
> <aidanmacdonald.0x0@gmail.com> wrote:
>>
>> This flag is necessary to prepare for fixing the behavior of unmask
>> registers. Existing chips that set mask_base and unmask_base must
>> set broken_mask_unmask=1 to declare that they expect the mask bits
>
> Boolean should take true/false.
>
>> will be inverted in both registers, contrary to the usual behavior
>> of mask registers.
>
>> diff --git a/include/linux/regmap.h b/include/linux/regmap.h
>> index ee2567a0465c..21a70fd99493 100644
>> --- a/include/linux/regmap.h
>> +++ b/include/linux/regmap.h
>> @@ -1523,6 +1523,7 @@ struct regmap_irq_chip {
>>         bool clear_on_unmask:1;
>>         bool not_fixed_stride:1;
>>         bool status_invert:1;
>> +       bool broken_mask_unmask:1;
>
> Looking at the given context, I would group it with clean_on_unmask above.
>
> The above is weird enough on its own. Can you prepare a precursor
> patch that either drops the bit fields of booleans or moves them to
> unsigned int?

Sure.

> Note, bit fields in C are beasts when it goes to concurrent access. It
> would be nice to ensure these are not the cases of a such.

These are read-only so there's no danger here.