From: Thierry Reding <thierry.reding@gmail.com>
To: randy <lxr1234@hotmail.com>
Cc: linux-pwm@vger.kernel.org
Subject: Re: [exynos4412]How to test a pwm device, is there a test program?
Date: Mon, 9 Dec 2013 12:55:24 +0100 [thread overview]
Message-ID: <20131209115523.GA17693@ulmo.nvidia.com> (raw)
In-Reply-To: <BLU0-SMTP1651F8FA9BEEB0257791F09ADD30@phx.gbl>
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On Mon, Dec 09, 2013 at 07:04:12PM +0800, randy wrote:
[...]
> Actually, I don't know whether the pwm works or not. In dmesg, I saw:
> [ 853.690000] samsung-pwm 139d0000.pwm: tried to request PWM channel
> 0 without output
> [ 876.930000] samsung-pwm 139d0000.pwm: tried to request PWM channel
> 0 without output
> [ 879.615000] samsung-pwm 139d0000.pwm: tried to request PWM channel
> 1 without output
>
> in my dts, I only add
> ================================
> pwm@139D0000 {
> status = "okay";
> };
> ================================
> is it enough to make pwm work, if the driver in kernel has been correct.
It seems like you're missing the samsung,pwm-outputs property (see
Documentation/devicetree/bindings/pwm/pwm-samsung.txt).
Thierry
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next prev parent reply other threads:[~2013-12-09 11:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-08 17:22 [exynos4412]How to test a pwm device, is there a test program? randy
2013-12-09 8:52 ` Thierry Reding
2013-12-09 11:04 ` randy
2013-12-09 11:55 ` Thierry Reding [this message]
2013-12-09 13:06 ` randy
2013-12-12 12:22 ` Thierry Reding
2013-12-12 14:27 ` randy
2013-12-14 12:44 ` Thierry Reding
2013-12-14 13:05 ` Tomasz Figa
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