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drm/sitronix/st7571-spi: add support for SPI interface 

Add support for ST7561/ST7571 connected to SPI bus.

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://patch.msgid.link/20251215-st7571-split-v3-6-d5f3205c3138@gmail.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
This commit is contained in:
Marcus Folkesson 2025-12-15 10:46:48 +01:00 committed by Javier Martinez Canillas
parent b362de167d
commit 052039e3fe
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GPG Key ID: C751E590D63F3D69
4 changed files with 90 additions and 0 deletions
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1
MAINTAINERS
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@ -8201,6 +8201,7 @@ 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

12
drivers/gpu/drm/sitronix/Kconfig
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@ -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

1
drivers/gpu/drm/sitronix/Makefile
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@ -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

76
drivers/gpu/drm/sitronix/st7571-spi.c Normal file
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@ -0,0 +1,76 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Sitronix ST7571 connected via SPI bus.
*
* Copyright (C) 2025 Marcus Folkesson <marcus.folkesson@gmail.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@gmail.com>");
MODULE_DESCRIPTION("DRM Driver for Sitronix ST7571 LCD controller (SPI)");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("DRM_ST7571");