linux-kernel - [PATCH] dt-bindings: restrict properties for sitronix,st7735r

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Message-ID: <20200120190249.GA9619@ravnborg.org>
Date:   Mon, 20 Jan 2020 20:02:49 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     David Lechner <david@...hnology.com>
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Noralf Trønnes <noralf@...nnes.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chris Brandt <chris.brandt@...esas.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: [PATCH] dt-bindings: restrict properties for sitronix,st7735r

Hi David.

> > +allOf:
> > +  - $ref: panel/panel-common.yaml#
> 
> not all of these properties are applicable.
> 

> > +required:
> > +  - compatible
> > +  - reg
> > +  - dc-gpios
> > +  - reset-gpios
> 
> Missing optional rotation and backlight properties.

Thanks for catching this. I have written a little .yaml files
since I applied this - and learned a little more of the syntax.

See attached patch for my attempt to fix this.
Please review.

	Sam

>From 6b54fb0a071c0732cd4bd5b88f456b5a85bcf4f2 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@...nborg.org>
Date: Mon, 20 Jan 2020 19:55:04 +0100
Subject: [PATCH] dt-bindings: restrict properties for sitronix,st7735r

David Lechner noticed (paraphrased):
- not all properties from panel-common are applicable.
- missing optional rotation and backlight properties

Fix this by listing all allowed properties, and do not allow other properties.

Fixes: abdd9e3705c8 ("dt-bindings: display: sitronix,st7735r: Convert to DT schema")
Reported-by: David Lechner <david@...hnology.com>
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: David Lechner <david@...hnology.com>
Cc: Rob Herring <robh@...nel.org>
Cc: dri-devel@...ts.freedesktop.org
---
 .../devicetree/bindings/display/sitronix,st7735r.yaml      | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml b/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
index 8892d79e6e10..0cebaaefda03 100644
--- a/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
+++ b/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
@@ -39,12 +39,19 @@ properties:
     maxItems: 1
     description: Display data/command selection (D/CX)
 
+  backlight: true
+  reg: true
+  reset-gpios: true
+  rotation: true
+
 required:
   - compatible
   - reg
   - dc-gpios
   - reset-gpios
 
+additionalProperties: false
+
 examples:
   - |
     #include <dt-bindings/gpio/gpio.h>
-- 
2.20.1