[PATCH v2 0/1] dt-bindings: spi/display/panel: drop SPI CPHA and CPOL

[PATCH v2 0/1] dt-bindings: spi/display/panel: drop SPI CPHA and CPOL

[Krzysztof Kozlowski]

Hi,

Rebased on Linus' master

Changes since v1
================
1. Rework patchset as Rob suggested, so there is only one patch - changing spi
   and display/panel.
v1: https://lore.kernel.org/all/20220721153155.245336-2-krzysztof.kozlowski@linaro.org/

Merging
=======
I guess via DT or SPI tree. I don't expect conflicts with display/panel tree
(at least nothing visible now in linux-next).

Description
===========
The spi-cpha and spi-cpol properties are device specific and should be
accepted only if device really needs them.  Inspired by [1].

[1] https://lore.kernel.org/all/20220718220012.GA3625497-robh@kernel.org/

Best regards,
Krzysztof

Krzysztof Kozlowski (1):
  spi/panel: dt-bindings: drop CPHA and CPOL from common properties

 .../bindings/display/panel/lgphilips,lb035q02.yaml    |  3 +++
 .../bindings/display/panel/samsung,ld9040.yaml        |  3 +++
 .../bindings/display/panel/sitronix,st7789v.yaml      |  3 +++
 .../devicetree/bindings/display/panel/tpo,td.yaml     |  3 +++
 .../devicetree/bindings/spi/spi-controller.yaml       | 11 +++++++++++
 .../devicetree/bindings/spi/spi-peripheral-props.yaml | 10 ----------
 6 files changed, 23 insertions(+), 10 deletions(-)

-- 
2.34.1

[PATCH v2 1/1] spi/panel: dt-bindings: drop CPHA and CPOL from common properties

[Krzysztof Kozlowski]

The spi-cpha and spi-cpol properties are device specific and should be
accepted only if device really needs them.  Drop them from common
spi-peripheral-props.yaml schema, mention in few panel drivers which use
them and include instead in the SPI controller bindings.  The controller
bindings will provide CPHA/CPOL type validation and one place for
description.  Each device schema must list the properties if they are
applicable.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../bindings/display/panel/lgphilips,lb035q02.yaml    |  3 +++
 .../bindings/display/panel/samsung,ld9040.yaml        |  3 +++
 .../bindings/display/panel/sitronix,st7789v.yaml      |  3 +++
 .../devicetree/bindings/display/panel/tpo,td.yaml     |  3 +++
 .../devicetree/bindings/spi/spi-controller.yaml       | 11 +++++++++++
 .../devicetree/bindings/spi/spi-peripheral-props.yaml | 10 ----------
 6 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml b/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml
index 5e4e0e552c2f..628c4b898111 100644
--- a/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml
+++ b/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml
@@ -21,6 +21,9 @@ properties:
   enable-gpios: true
   port: true
 
+  spi-cpha: true
+  spi-cpol: true
+
 required:
   - compatible
   - enable-gpios
diff --git a/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml b/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml
index d525165d6d63..c0fabeb38628 100644
--- a/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml
+++ b/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml
@@ -42,6 +42,9 @@ properties:
   panel-height-mm:
     description: physical panel height [mm]
 
+  spi-cpha: true
+  spi-cpol: true
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
index 9e1d707c2ace..d984b59daa4a 100644
--- a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
@@ -23,6 +23,9 @@ properties:
   backlight: true
   port: true
 
+  spi-cpha: true
+  spi-cpol: true
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/display/panel/tpo,td.yaml b/Documentation/devicetree/bindings/display/panel/tpo,td.yaml
index f902a9d74141..e8c8ee8d7c88 100644
--- a/Documentation/devicetree/bindings/display/panel/tpo,td.yaml
+++ b/Documentation/devicetree/bindings/display/panel/tpo,td.yaml
@@ -28,6 +28,9 @@ properties:
   backlight: true
   port: true
 
+  spi-cpha: true
+  spi-cpol: true
+
 required:
   - compatible
   - port
diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
index 678cee68b52a..655713fba7e2 100644
--- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
@@ -95,6 +95,17 @@ patternProperties:
     type: object
     $ref: spi-peripheral-props.yaml
 
+    properties:
+      spi-cpha:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description:
+          The device requires shifted clock phase (CPHA) mode.
+
+      spi-cpol:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description:
+          The device requires inverse clock polarity (CPOL) mode.
+
     required:
       - compatible
       - reg
diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
index 5e32928c4fc3..2349f83c07f3 100644
--- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
@@ -34,16 +34,6 @@ properties:
     description:
       The device requires 3-wire mode.
 
-  spi-cpha:
-    $ref: /schemas/types.yaml#/definitions/flag
-    description:
-      The device requires shifted clock phase (CPHA) mode.
-
-  spi-cpol:
-    $ref: /schemas/types.yaml#/definitions/flag
-    description:
-      The device requires inverse clock polarity (CPOL) mode.
-
   spi-cs-high:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
-- 
2.34.1

Re: [PATCH v2 1/1] spi/panel: dt-bindings: drop CPHA and CPOL from common properties

[Sam Ravnborg]

Hi Krzysztof

On Fri, Jul 22, 2022 at 09:15:39PM +0200, Krzysztof Kozlowski wrote:
> The spi-cpha and spi-cpol properties are device specific and should be
> accepted only if device really needs them.  Drop them from common
> spi-peripheral-props.yaml schema, mention in few panel drivers which use
> themi

    "and include instead in the SPI controller bindings."

I cannot see you do this in the touched bindings.

So I cannot see how for example samsung,ld9040.yaml picks up
spi-controller.yaml and thus it no longer knows the spi-cpha and spi-cpol
properties.

Maybe I missed something?

	Sam

Re: [PATCH v2 1/1] spi/panel: dt-bindings: drop CPHA and CPOL from common properties

[Krzysztof Kozlowski]

On 22/07/2022 21:45, Sam Ravnborg wrote:
> Hi Krzysztof
> 
> On Fri, Jul 22, 2022 at 09:15:39PM +0200, Krzysztof Kozlowski wrote:
>> The spi-cpha and spi-cpol properties are device specific and should be
>> accepted only if device really needs them.  Drop them from common
>> spi-peripheral-props.yaml schema, mention in few panel drivers which use
>> themi
> 
>     "and include instead in the SPI controller bindings."
> 
> I cannot see you do this in the touched bindings.

Yep, because you always have two schemas being in play. One is SPI
controller and other is the device (SPI slave).

> So I cannot see how for example samsung,ld9040.yaml picks up
> spi-controller.yaml and thus it no longer knows the spi-cpha and spi-cpol
> properties.

ld9040 is not spi-controller, but a SPI slave device, AFAIU. It will be
therefore a child of some SPI controller, thus the SPI controller
schema, which includes spi-controller.yaml, will validate the type of
spi-cpha/cpol properties.


Best regards,
Krzysztof

Re: [PATCH v2 1/1] spi/panel: dt-bindings: drop CPHA and CPOL from common properties

[Rob Herring]

On Fri, 22 Jul 2022 21:15:39 +0200, Krzysztof Kozlowski wrote:
> The spi-cpha and spi-cpol properties are device specific and should be
> accepted only if device really needs them.  Drop them from common
> spi-peripheral-props.yaml schema, mention in few panel drivers which use
> them and include instead in the SPI controller bindings.  The controller
> bindings will provide CPHA/CPOL type validation and one place for
> description.  Each device schema must list the properties if they are
> applicable.
> 
> Suggested-by: Jonathan Cameron <jic23@kernel.org>
> Suggested-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> ---
>  .../bindings/display/panel/lgphilips,lb035q02.yaml    |  3 +++
>  .../bindings/display/panel/samsung,ld9040.yaml        |  3 +++
>  .../bindings/display/panel/sitronix,st7789v.yaml      |  3 +++
>  .../devicetree/bindings/display/panel/tpo,td.yaml     |  3 +++
>  .../devicetree/bindings/spi/spi-controller.yaml       | 11 +++++++++++
>  .../devicetree/bindings/spi/spi-peripheral-props.yaml | 10 ----------
>  6 files changed, 23 insertions(+), 10 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Unless Mark doesn't want to pick this up.

Re: [PATCH v2 0/1] dt-bindings: spi/display/panel: drop SPI CPHA and CPOL

[Mark Brown]

On Fri, 22 Jul 2022 21:15:38 +0200, Krzysztof Kozlowski wrote:
> Rebased on Linus' master
> 
> Changes since v1
> ================
> 1. Rework patchset as Rob suggested, so there is only one patch - changing spi
>    and display/panel.
> v1: https://lore.kernel.org/all/20220721153155.245336-2-krzysztof.kozlowski@linaro.org/
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/1] spi/panel: dt-bindings: drop CPHA and CPOL from common properties
      commit: 233363aba72ac638dda6838f8e817c46d36c2431

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

Re: [PATCH v2 1/1] spi/panel: dt-bindings: drop CPHA and CPOL from common properties

[Jonathan Cameron]

On Fri, 22 Jul 2022 21:15:39 +0200
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:

> The spi-cpha and spi-cpol properties are device specific and should be
> accepted only if device really needs them.  Drop them from common
> spi-peripheral-props.yaml schema, mention in few panel drivers which use
> them and include instead in the SPI controller bindings.  The controller
> bindings will provide CPHA/CPOL type validation and one place for
> description.  Each device schema must list the properties if they are
> applicable.
> 
> Suggested-by: Jonathan Cameron <jic23@kernel.org>
> Suggested-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

This seems like a good solution to me.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  .../bindings/display/panel/lgphilips,lb035q02.yaml    |  3 +++
>  .../bindings/display/panel/samsung,ld9040.yaml        |  3 +++
>  .../bindings/display/panel/sitronix,st7789v.yaml      |  3 +++
>  .../devicetree/bindings/display/panel/tpo,td.yaml     |  3 +++
>  .../devicetree/bindings/spi/spi-controller.yaml       | 11 +++++++++++
>  .../devicetree/bindings/spi/spi-peripheral-props.yaml | 10 ----------
>  6 files changed, 23 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml b/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml
> index 5e4e0e552c2f..628c4b898111 100644
> --- a/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/lgphilips,lb035q02.yaml
> @@ -21,6 +21,9 @@ properties:
>    enable-gpios: true
>    port: true
>  
> +  spi-cpha: true
> +  spi-cpol: true
> +
>  required:
>    - compatible
>    - enable-gpios
> diff --git a/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml b/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml
> index d525165d6d63..c0fabeb38628 100644
> --- a/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/samsung,ld9040.yaml
> @@ -42,6 +42,9 @@ properties:
>    panel-height-mm:
>      description: physical panel height [mm]
>  
> +  spi-cpha: true
> +  spi-cpol: true
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
> index 9e1d707c2ace..d984b59daa4a 100644
> --- a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
> @@ -23,6 +23,9 @@ properties:
>    backlight: true
>    port: true
>  
> +  spi-cpha: true
> +  spi-cpol: true
> +
>  required:
>    - compatible
>    - reg
> diff --git a/Documentation/devicetree/bindings/display/panel/tpo,td.yaml b/Documentation/devicetree/bindings/display/panel/tpo,td.yaml
> index f902a9d74141..e8c8ee8d7c88 100644
> --- a/Documentation/devicetree/bindings/display/panel/tpo,td.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/tpo,td.yaml
> @@ -28,6 +28,9 @@ properties:
>    backlight: true
>    port: true
>  
> +  spi-cpha: true
> +  spi-cpol: true
> +
>  required:
>    - compatible
>    - port
> diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
> index 678cee68b52a..655713fba7e2 100644
> --- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
> +++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
> @@ -95,6 +95,17 @@ patternProperties:
>      type: object
>      $ref: spi-peripheral-props.yaml
>  
> +    properties:
> +      spi-cpha:
> +        $ref: /schemas/types.yaml#/definitions/flag
> +        description:
> +          The device requires shifted clock phase (CPHA) mode.
> +
> +      spi-cpol:
> +        $ref: /schemas/types.yaml#/definitions/flag
> +        description:
> +          The device requires inverse clock polarity (CPOL) mode.
> +
>      required:
>        - compatible
>        - reg
> diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
> index 5e32928c4fc3..2349f83c07f3 100644
> --- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
> +++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
> @@ -34,16 +34,6 @@ properties:
>      description:
>        The device requires 3-wire mode.
>  
> -  spi-cpha:
> -    $ref: /schemas/types.yaml#/definitions/flag
> -    description:
> -      The device requires shifted clock phase (CPHA) mode.
> -
> -  spi-cpol:
> -    $ref: /schemas/types.yaml#/definitions/flag
> -    description:
> -      The device requires inverse clock polarity (CPOL) mode.
> -
>    spi-cs-high:
>      $ref: /schemas/types.yaml#/definitions/flag
>      description: