linux-kernel - Re: [PATCH 3/4] Input: pwm-vibra

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Date:   Tue, 02 May 2023 17:24:44 +0200
From:   Luca Weiss <luca@...tu.xyz>
To:     Brian Masney <bmasney@...hat.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Brian Masney <masneyb@...tation.org>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 3/4] Input: pwm-vibra - add support for enable GPIO

On Dienstag, 2. Mai 2023 12:39:10 CEST Konrad Dybcio wrote:
> On 28.04.2023 18:06, Luca Weiss wrote:
> > On Freitag, 28. April 2023 01:29:27 CEST Brian Masney wrote:
> >> On Thu, Apr 27, 2023 at 10:34:28PM +0200, Luca Weiss wrote:
> >>> Some pwm vibrators have a dedicated enable GPIO that needs to be set
> >>> high so that the vibrator works. Add support for that optionally.
> >>> 
> >>> Signed-off-by: Luca Weiss <luca@...tu.xyz>
> >> 
> >> Hi Luca,
> >> 
> >> Thank you for picking up this work!
> >> 
> >>> +	vibrator->enable_gpio = devm_gpiod_get_optional(&pdev->dev,
> > 
> > "enable",
> > 
> >>> +
> > 
> > GPIOD_OUT_LOW);
> > 
> >>> +	err = PTR_ERR_OR_ZERO(vibrator->enable_gpio);
> >>> +	if (err) {
> >>> +		if (err != -EPROBE_DEFER)
> >>> +			dev_err(&pdev->dev, "Failed to request enable
> > 
> > gpio: %d\n",
> > 
> >>> +				err);
> >>> +		return err;
> >>> +	}
> >>> +
> 
> Looks like your email client messes with the replies.. perhaps it tries
> to round them to n characters forcefully?

Quite possible, I'm using KMail with Options -> Wordwrap turned on, otherwise 
I have to manually wrap everything but with this on there doesn't seem to be a 
way to get over that limit, even when posting links etc - or when quoting 
existing text.

Regards
Luca

> 
> Konrad
> 
> >> Take a look at dev_err_probe() to remove the -EPROBE_DEFER check.
> > 
> > The input subsystem doesn't like dev_err_probe for some reason, you should
> > quickly find examples of that being rejected on the mailing list (or see
> > "git grep dev_err_probe drivers/input/")
> > 
> >> With that fixed:
> >> 
> >> Reviewed-by: Brian Masney <bmasney@...hat.com>
> > 
> > Thanks for the reviews!