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Message-Id: <20251024-st7571-split-v1-6-d3092b98130f@gmail.com>
Date: Fri, 24 Oct 2025 12:56:57 +0200
From: Marcus Folkesson <marcus.folkesson@...il.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Marcus Folkesson <marcus.folkesson@...il.com>
Subject: [PATCH 6/6] drm/sitronix/st7571-spi: add support for SPI interface
Add support for ST7561/ST7571 connected to SPI bus.
Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---
MAINTAINERS | 1 +
drivers/gpu/drm/sitronix/Kconfig | 12 ++++++
drivers/gpu/drm/sitronix/Makefile | 1 +
drivers/gpu/drm/sitronix/st7571-spi.c | 75 +++++++++++++++++++++++++++++++++++
4 files changed, 89 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 66e9ffb757c8bb19dbb894eb51f88f589ee83af6..c89e521cafa1d50fd94bfe7a6868c531aec1f494 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8083,6 +8083,7 @@ 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
+F: drivers/gpu/drm/sitronix/st7571-spi.c
F: drivers/gpu/drm/sitronix/st7571.c
F: drivers/gpu/drm/sitronix/st7571.h
diff --git a/drivers/gpu/drm/sitronix/Kconfig b/drivers/gpu/drm/sitronix/Kconfig
index 0676a86661caa4ab81f226ff2e990a3e2526f74d..2204250ab4136ac2d3f18f295dc7413a6e17ed45 100644
--- a/drivers/gpu/drm/sitronix/Kconfig
+++ b/drivers/gpu/drm/sitronix/Kconfig
@@ -27,6 +27,18 @@ config DRM_ST7571_I2C
if M is selected the module will be called st7571-i2c.
+config DRM_ST7571_SPI
+ tristate "DRM support for Sitronix ST7567/ST7571 display panels (SPI)"
+ depends on DRM_ST7571 && SPI
+ select REGMAP_SPI
+ help
+ Sitronix ST7571 is a driver and controller for 4-level gray
+ scale and monochrome dot matrix LCD panels.
+
+ DRM driver for Sitronix ST7565/ST7571 panels connected via SPI bus.
+
+ if M is selected the module will be called st7571-spi.
+
config DRM_ST7586
tristate "DRM support for Sitronix ST7586 display panels"
depends on DRM && SPI
diff --git a/drivers/gpu/drm/sitronix/Makefile b/drivers/gpu/drm/sitronix/Makefile
index 8073bb776ff94de750f350b636fd9db3d54fdd46..c631e3359c3dc21ab8522b8f0cfe6e9bf0dbc011 100644
--- a/drivers/gpu/drm/sitronix/Makefile
+++ b/drivers/gpu/drm/sitronix/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_DRM_ST7571) += st7571.o
obj-$(CONFIG_DRM_ST7571_I2C) += st7571-i2c.o
+obj-$(CONFIG_DRM_ST7571_SPI) += st7571-spi.o
obj-$(CONFIG_DRM_ST7586) += st7586.o
obj-$(CONFIG_DRM_ST7735R) += st7735r.o
diff --git a/drivers/gpu/drm/sitronix/st7571-spi.c b/drivers/gpu/drm/sitronix/st7571-spi.c
new file mode 100644
index 0000000000000000000000000000000000000000..104737ca860ce44ff411dbdd36c3a7b32a81733f
--- /dev/null
+++ b/drivers/gpu/drm/sitronix/st7571-spi.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Sitronix ST7571 connected via SPI bus.
+ *
+ * Copyright (C) 2025 Marcus Folkesson <marcus.folkesson@...il.com>
+ */
+
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "st7571.h"
+
+static const struct regmap_config st7571_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .can_multi_write = true,
+};
+
+static int st7571_spi_probe(struct spi_device *spi)
+{
+ struct st7571_device *st7571;
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &st7571_spi_regmap_config);
+ if (IS_ERR(regmap)) {
+ return dev_err_probe(&spi->dev, PTR_ERR(regmap),
+ "Failed to initialize regmap\n");
+ }
+
+ st7571 = st7571_probe(&spi->dev, regmap);
+ if (IS_ERR(st7571))
+ return dev_err_probe(&spi->dev, PTR_ERR(st7571),
+ "Failed to initialize regmap\n");
+
+ spi_set_drvdata(spi, st7571);
+ return 0;
+}
+
+static void st7571_spi_remove(struct spi_device *spi)
+{
+ struct st7571_device *st7571 = spi_get_drvdata(spi);
+
+ st7571_remove(st7571);
+}
+
+static const struct of_device_id st7571_of_match[] = {
+ { .compatible = "sitronix,st7567", .data = &st7567_config },
+ { .compatible = "sitronix,st7571", .data = &st7571_config },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st7571_of_match);
+
+static const struct spi_device_id st7571_spi_id[] = {
+ { "st7567", 0 },
+ { "st7571", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, st7571_spi_id);
+
+static struct spi_driver st7571_spi_driver = {
+ .driver = {
+ .name = "st7571-spi",
+ .of_match_table = st7571_of_match,
+ },
+ .probe = st7571_spi_probe,
+ .remove = st7571_spi_remove,
+ .id_table = st7571_spi_id,
+};
+
+module_spi_driver(st7571_spi_driver);
+
+MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@...il.com>");
+MODULE_DESCRIPTION("DRM Driver for Sitronix ST7571 LCD controller (SPI)");
+MODULE_LICENSE("GPL");
--
2.50.1
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