linux-kernel - Re: Vibrations on Droid 4?

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Message-ID: <20180710161123.azym6sbboriuj4yc@earth.universe>
Date:   Tue, 10 Jul 2018 18:11:23 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Pavel Machek <pavel@....cz>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, nekit1000@...il.com,
        mpartap@....net, merlijn@...zup.org
Subject: Re: Vibrations on Droid 4?

Hi,

On Tue, Jul 10, 2018 at 03:30:40PM +0200, Pavel Machek wrote:
> On Tue 2018-07-10 12:11:47, Sebastian Reichel wrote:
> > On Tue, Jul 10, 2018 at 12:02:11AM +0200, Pavel Machek wrote:
> > > > > Do you have vibrations on d4 working?
> > > > > I believe I have required drivers enabled, but no luck:
> > > > > 
> > > > > user@...uan:/sys/bus/platform/drivers$ ls pwm-vibrator/
> > > > > bind  uevent  unbind
> > > > > user@...uan:/sys/bus/platform/drivers$ ls omap-dmtimer-pwm/
> > > > > bind  uevent  unbind
> > > > 
> > > > Have you checked probe deferrals?
> > > 
> > > Not really. Is there easier way to do that than adding printks in the
> > > probe function? (I can go through dmesg tommorow).
> > 
> > Option 1: https://lkml.org/lkml/2018/7/8/63
> 
> I tried this methodq, and no luck.
> 
> static int pwm_omap_dmtimer_probe(struct platform_device *pdev)
> 
> does not seem to be called.
> 
> Its parent is gpio@...5d000 , and that one seems to be present.
> 
> user@...uan:/sys/bus/platform/devices$ ls 4805d000.gpio
> driver				       driver_override  gpio
> gpiochip5  modalias  of_node  power  subsystem  uevent

Sorry, something went wrong with merging this. The parent
of ti,omap-dmtimer-pwm and pwm-vibrator should be / and
not gpio6.

-- Sebastian

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