linux-kernel - Re: [PATCH v13 2/4] arm64: dts: fsl: librem5: Add a device tree for the Librem5 devkit

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Message-ID: <20190523191922.GA3803@xo-6d-61-c0.localdomain>
Date:   Thu, 23 May 2019 21:19:22 +0200
From:   Pavel Machek <pavel@....cz>
To:     "Angus Ainslie (Purism)" <angus@...ea.ca>
Cc:     angus.ainslie@...i.sm, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 2/4] arm64: dts: fsl: librem5: Add a device tree for
 the Librem5 devkit

Hi!

> This is for the development kit board for the Librem 5. The current level
> of support yields a working console and is able to boot userspace from
> the network or eMMC.
> 
> Additional subsystems that are active :

> - haptic motor

Haptic motor is not a LED. It should be controlled by input subsystem.

> +	pwmleds {
> +		compatible = "pwm-leds";
> +
> +		haptic {
> +			label = "librem5::haptic";
> +			pwms = <&pwm2 0 200000>;
> +			active-low;
> +			max-brightness = <255>;
> +			power-supply = <&reg_3v3_p>;
> +		};
> +	};

You can take a look at N900, that has reasonable interface.

Thanks,
										Pavel