linux-kernel - Re: [PATCH 02/11] MIPS: qi_lb60: Migrate to devicetree

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Message-ID: <20190725234735.h7qmtt26qpkjw3n6@pburton-laptop>
Date:   Thu, 25 Jul 2019 23:47:37 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     Paul Cercueil <paul@...pouillou.net>
CC:     Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Vinod Koul <vkoul@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Lee Jones <lee.jones@...aro.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Sebastian Reichel <sre@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, "od@...c.me" <od@...c.me>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        Artur Rojek <contact@...ur-rojek.eu>
Subject: Re: [PATCH 02/11] MIPS: qi_lb60: Migrate to devicetree

Hi Paul,

On Thu, Jul 25, 2019 at 06:02:06PM -0400, Paul Cercueil wrote:
> Move all the platform data to devicetree.

Nice! :)

> The only bit dropped is the PWM beeper, which requires the PWM driver
> to be updated. I figured it's okay to remove it here since it's really
> a non-critical device, and it'll be re-introduced soon enough.

OK, I can see that being a price worth paying. Though it's possible to
include the binding at least for that in this series I'd be even
happier. Actually I see we already have

  Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt

in mainline - what needs to change with it?

> +	spi {
> +		compatible = "spi-gpio";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		sck-gpios = <&gpc 23 GPIO_ACTIVE_HIGH>;
> +		mosi-gpios = <&gpc 22 GPIO_ACTIVE_HIGH>;
> +		cs-gpios = <&gpc 21 GPIO_ACTIVE_LOW>;
> +		num-chipselects = <1>;
> +
> +		spi@0 {
> +			compatible = "ili8960";

Should this be "ilitek,ili8960"?

Is there a binding & driver for this submitted somewhere? If not then do
we need this at all? It doesn't look like the existing platform data
would actually lead to a driver being loaded so I'm wondering if we can
just drop this until such a driver (or at least a documented DT binding)
exists.

Thanks,
    Paul