[PATCH 0/3] drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

[PATCH 0/3] drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

[Javier Martinez Canillas]

This patch-series adds support for the Sitronix ST7567 Controller, which is is a
monochrome Dot Matrix LCD Controller that has SPI, I2C and parallel interfaces.

The st7571-i2c driver only has support for I2C so displays using other transport
interfaces are currently not supported.

The DRM_FORMAT_R1 pixel format and data commands are the same than what is used
by the ST7571 controller, so only is needed a different callback that implements
the expected initialization sequence for the ST7567 chip.

Patch #1 adds a Device Tree binding schema for the ST7567 Controller.

Patch #2 makes the "reset-gpios" property in the driver to be optional since that
isn't needed for the ST7567.

Patch #3 finally extends the st7571-i2c driver to also support the ST7567 device.


Javier Martinez Canillas (3):
  dt-bindings: display: Add Sitronix ST7567 LCD Controller
  drm/sitronix/st7571-i2c: Make the reset GPIO to be optional
  drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

 .../bindings/display/sitronix,st7567.yaml     | 63 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 drivers/gpu/drm/sitronix/st7571-i2c.c         | 55 +++++++++++++++-
 3 files changed, 117 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/sitronix,st7567.yaml

-- 
2.49.0

base-commit: 93eacfcdfbb590d9ed6889d381d5a586dd1ac860
branch: drm-st7567

[PATCH 1/3] dt-bindings: display: Add Sitronix ST7567 LCD Controller

[Javier Martinez Canillas]

Sitronix ST7567 is a monochrome Dot Matrix LCD Controller.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
---

 .../bindings/display/sitronix,st7567.yaml     | 63 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sitronix,st7567.yaml

diff --git a/Documentation/devicetree/bindings/display/sitronix,st7567.yaml b/Documentation/devicetree/bindings/display/sitronix,st7567.yaml
new file mode 100644
index 000000000000..e8a5b8ad18fe
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sitronix,st7567.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sitronix,st7567.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sitronix ST7567 Display Controller
+
+maintainers:
+  - Javier Martinez Canillas <javierm@redhat.com>
+
+description:
+  Sitronix ST7567 is a driver and controller for monochrome
+  dot matrix LCD panels.
+
+allOf:
+  - $ref: panel/panel-common.yaml#
+
+properties:
+  compatible:
+    const: sitronix,st7567
+
+  reg:
+    maxItems: 1
+
+  width-mm: true
+  height-mm: true
+  panel-timing: true
+
+required:
+  - compatible
+  - reg
+  - width-mm
+  - height-mm
+  - panel-timing
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        display@3f {
+            compatible = "sitronix,st7567";
+            reg = <0x3f>;
+            width-mm = <37>;
+            height-mm = <27>;
+
+            panel-timing {
+                hactive = <128>;
+                vactive = <64>;
+                hback-porch = <0>;
+                vback-porch = <0>;
+                clock-frequency = <0>;
+                hfront-porch = <0>;
+                hsync-len = <0>;
+                vfront-porch = <0>;
+                vsync-len = <0>;
+            };
+          };
+     };
diff --git a/MAINTAINERS b/MAINTAINERS
index ee2ef9d9db2a..d97e091b1742 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7835,6 +7835,7 @@ F:	drivers/gpu/drm/sitronix/st7586.c
 DRM DRIVER FOR SITRONIX ST7571 PANELS
 M:	Marcus Folkesson <marcus.folkesson@gmail.com>
 S:	Maintained
+F:	Documentation/devicetree/bindings/display/sitronix,st7567.yaml
 F:	Documentation/devicetree/bindings/display/sitronix,st7571.yaml
 F:	drivers/gpu/drm/sitronix/st7571-i2c.c
 
-- 
2.49.0

Re: [PATCH 1/3] dt-bindings: display: Add Sitronix ST7567 LCD Controller

[Rob Herring (Arm)]

On Thu, 10 Jul 2025 12:24:33 +0200, Javier Martinez Canillas wrote:
> Sitronix ST7567 is a monochrome Dot Matrix LCD Controller.
> 
> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
> ---
> 
>  .../bindings/display/sitronix,st7567.yaml     | 63 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sitronix,st7567.yaml
> 

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

Re: [PATCH 0/3] drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

[Marcus Folkesson]

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Hello Javier,


On Thu, Jul 10, 2025 at 12:24:32PM +0200, Javier Martinez Canillas wrote:
> This patch-series adds support for the Sitronix ST7567 Controller, which is is a
> monochrome Dot Matrix LCD Controller that has SPI, I2C and parallel interfaces.
> 
> The st7571-i2c driver only has support for I2C so displays using other transport
> interfaces are currently not supported.
> 
> The DRM_FORMAT_R1 pixel format and data commands are the same than what is used
> by the ST7571 controller, so only is needed a different callback that implements
> the expected initialization sequence for the ST7567 chip.
> 
> Patch #1 adds a Device Tree binding schema for the ST7567 Controller.
> 
> Patch #2 makes the "reset-gpios" property in the driver to be optional since that
> isn't needed for the ST7567.
> 
> Patch #3 finally extends the st7571-i2c driver to also support the ST7567 device.
> 
> 
> Javier Martinez Canillas (3):
>   dt-bindings: display: Add Sitronix ST7567 LCD Controller
>   drm/sitronix/st7571-i2c: Make the reset GPIO to be optional
>   drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

For all patches in this series:

Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com>

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Re: [PATCH 0/3] drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

[Javier Martinez Canillas]

Marcus Folkesson <marcus.folkesson@gmail.com> writes:

Hello Marcus,

> Hello Javier,
>
>
> On Thu, Jul 10, 2025 at 12:24:32PM +0200, Javier Martinez Canillas wrote:
>> This patch-series adds support for the Sitronix ST7567 Controller, which is is a
>> monochrome Dot Matrix LCD Controller that has SPI, I2C and parallel interfaces.
>> 
>> The st7571-i2c driver only has support for I2C so displays using other transport
>> interfaces are currently not supported.
>> 
>> The DRM_FORMAT_R1 pixel format and data commands are the same than what is used
>> by the ST7571 controller, so only is needed a different callback that implements
>> the expected initialization sequence for the ST7567 chip.
>> 
>> Patch #1 adds a Device Tree binding schema for the ST7567 Controller.
>> 
>> Patch #2 makes the "reset-gpios" property in the driver to be optional since that
>> isn't needed for the ST7567.
>> 
>> Patch #3 finally extends the st7571-i2c driver to also support the ST7567 device.
>> 
>> 
>> Javier Martinez Canillas (3):
>>   dt-bindings: display: Add Sitronix ST7567 LCD Controller
>>   drm/sitronix/st7571-i2c: Make the reset GPIO to be optional
>>   drm/sitronix/st7571-i2c: Add support for the ST7567 Controller
>
> For all patches in this series:
>
> Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com>

Thanks! I'll merge this patch series next week then, since I also got an
ack from a DT maintainer.

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat