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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Robin van der Gracht <robin@protonic.nl>
Cc: Rob Herring <robh+dt@kernel.org>, Miguel Ojeda <ojeda@kernel.org>,
	Paul Burton <paulburton@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@vger.kernel.org>,
	"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 02/17] dt-bindings: auxdisplay: ht16k33: Document Adafruit segment displays
Date: Wed, 19 May 2021 13:02:20 +0200	[thread overview]
Message-ID: <CAMuHMdVZMtJ8nRZXWnNz9U0_GKkUQn2+gkvx+Q=+c5tcfEVHUQ@mail.gmail.com> (raw)
In-Reply-To: <a5cf3ba594ab7ba36c1f4d5760796625@protonic.nl>

Hoi Robin,

On Wed, May 19, 2021 at 12:37 PM Robin van der Gracht <robin@protonic.nl> wrote:
> On 2021-05-18 16:35, Geert Uytterhoeven wrote:
> > On Tue, Mar 23, 2021 at 10:12 AM robin <robin@protonic.nl> wrote:
> >> On 2021-03-22 15:48, Geert Uytterhoeven wrote:
> >> > The Holtek HT16K33 LED controller is not only used for driving
> >> > dot-matrix displays, but also for driving segment displays.
> >> >
> >> > Document compatible values for the Adafruit 7-segment[1] and
> >> > 14-segment[2] FeatherWing expansion boards with red displays.
> >> > According
> >> > to the schematics, all other Adafruit 7-segment and 14-segment display
> >> > backpack and FeatherWing expansion boards (including bare boards and
> >> > boards fitted with displays) are compatible with these two boards.
> >> > Add a "color" property to support the different color variants.
> >> >
> >> > [1] https://www.adafruit.com/product/3108
> >> > [2] https://www.adafruit.com/product/3130
> >> >
> >> > Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> >
> >> > --- a/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
> >> > +++ b/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
> >> > @@ -14,14 +14,23 @@ allOf:
> >> >
> >> >  properties:
> >> >    compatible:
> >> > -    const: holtek,ht16k33
> >> > +    oneOf:
> >> > +      - items:
> >> > +          - const: adafruit,3108  # 0.56" 4-Digit 7-Segment
> >> > FeatherWing Display (Red)
> >> > +          - const: holtek,ht16k33
> >> > +
> >> > +      - items:
> >> > +          - const: adafruit,3130  # 0.54" Quad Alphanumeric
> >> > FeatherWing Display (Red)
> >> > +          - const: holtek,ht16k33
> >> > +
> >> > +      - const: holtek,ht16k33     # Generic 16*8 LED controller with
> >> > dot-matrix display
> >> >
> >> >    reg:
> >> >      maxItems: 1
> >> >
> >> >    refresh-rate-hz:
> >> >      maxItems: 1
> >> > -    description: Display update interval in Hertz
> >> > +    description: Display update interval in Hertz for dot-matrix
> >> > displays
> >>
> >> The above should be included in patch 16
> >
> > I disagree: bindings are independent from the driver implementation.
> >
> >> >    interrupts:
> >> >      maxItems: 1
> >> > @@ -41,10 +50,17 @@ properties:
> >> >      default: 16
> >> >      description: Initial brightness level
> >> >
> >> > +  color: true
> >> > +    description:
> >> > +      Color of the display.  Use one of the LED_COLOR_ID_* prefixed
> >> > definitions
> >> > +      from the header include/dt-bindings/leds/common.h.  The default
> >> > is red.
> >> > +    minimum: 0
> >> > +    maximum: 9
> >> > +    default: 1
> >> > +
> >>
> >> The above should be included in patch 17
> >
> > Same here.
>
> My thought was that one without the other makes no sense. But if it's common
> practice to create a separate patch for device tree bindings (it's a
> patch-set
> after all) than that's fine with me.

scripts/checkpatch.pl even has a check for that:

    WARN("DT_SPLIT_BINDING_PATCH",
         "DT binding docs and includes should be a separate patch.
See: Documentation/devicetree/bindings/submitting-patches.rst\n");

See also rule #5 in the doc referred above:

  5) The Documentation/ portion of the patch should come in the series before
     the code implementing the binding.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

  reply	other threads:[~2021-05-19 11:02 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-22 14:48 [PATCH 00/17] auxdisplay: ht16k33: Add character display support Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 01/17] uapi: Add <linux/map_to_14segment.h> Geert Uytterhoeven
2021-03-22 17:05   ` Miguel Ojeda
2021-03-22 17:51     ` Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 02/17] dt-bindings: auxdisplay: ht16k33: Document Adafruit segment displays Geert Uytterhoeven
2021-03-22 17:38   ` Rob Herring
2021-03-23  9:12   ` robin
2021-05-18 14:35     ` Geert Uytterhoeven
2021-05-19 10:37       ` Robin van der Gracht
2021-05-19 11:02         ` Geert Uytterhoeven [this message]
2021-03-22 14:48 ` [PATCH 03/17] auxdisplay: img-ascii-lcd: Fix lock-up when displaying empty string Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 04/17] auxdisplay: img-ascii-lcd: Add helper variable dev Geert Uytterhoeven
2021-03-22 16:59   ` Miguel Ojeda
2021-03-22 17:53     ` Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 05/17] auxdisplay: img-ascii-lcd: Convert device attribute to sysfs_emit() Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 06/17] auxdisplay: Extract character line display core support Geert Uytterhoeven
2021-03-23  8:18   ` robin
2021-03-23  8:52     ` Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 07/17] auxdisplay: linedisp: Use kmemdup_nul() helper Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 08/17] auxdisplay: linedisp: Add support for changing scroll rate Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 09/17] auxdisplay: ht16k33: Use HT16K33_FB_SIZE in ht16k33_initialize() Geert Uytterhoeven
2021-03-23  7:59   ` robin
2021-03-22 14:48 ` [PATCH 10/17] auxdisplay: ht16k33: Remove unneeded error check in keypad probe() Geert Uytterhoeven
2021-03-23  8:08   ` robin
2021-03-22 14:48 ` [PATCH 11/17] auxdisplay: ht16k33: Convert to simple i2c probe function Geert Uytterhoeven
2021-03-23  8:31   ` robin
2021-03-22 14:48 ` [PATCH 12/17] auxdisplay: ht16k33: Add helper variable dev Geert Uytterhoeven
2021-03-23  8:57   ` robin
2021-03-22 14:48 ` [PATCH 13/17] auxdisplay: ht16k33: Move delayed work Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 14/17] auxdisplay: ht16k33: Extract ht16k33_brightness_set() Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 15/17] auxdisplay: ht16k33: Extract frame buffer probing Geert Uytterhoeven
2021-03-22 14:48 ` [PATCH 16/17] auxdisplay: ht16k33: Add support for segment displays Geert Uytterhoeven
2021-03-29  7:08   ` Robin van der Gracht
2021-03-29  7:15     ` Geert Uytterhoeven
2021-03-29  7:30       ` Robin van der Gracht
2021-03-22 14:48 ` [PATCH 17/17] auxdisplay: ht16k33: Add segment display LED support Geert Uytterhoeven
2021-03-23 10:08   ` Robin van der Gracht
2021-03-23 12:32     ` Geert Uytterhoeven
2021-03-23 20:40       ` Pavel Machek
2021-03-24  8:31         ` Geert Uytterhoeven
2021-03-27 22:19           ` Pavel Machek
2021-06-25 12:39           ` Geert Uytterhoeven
2021-03-22 17:03 ` [PATCH 00/17] auxdisplay: ht16k33: Add character display support Miguel Ojeda

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