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

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Message-ID: <20250710102453.101078-1-javierm@redhat.com>
Date: Thu, 10 Jul 2025 12:24:32 +0200
From: Javier Martinez Canillas <javierm@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: ipedrosa@...hat.com,
	Javier Martinez Canillas <javierm@...hat.com>,
	Conor Dooley <conor+dt@...nel.org>,
	David Airlie <airlied@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Marcus Folkesson <marcus.folkesson@...il.com>,
	Maxime Ripard <mripard@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Simona Vetter <simona@...ll.ch>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH 0/3] drm/sitronix/st7571-i2c: Add support for the ST7567 Controller

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