1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for Sitronix ST7571 connected via SPI bus.
4 *
5 * Copyright (C) 2025 Marcus Folkesson <marcus.folkesson@gmail.com>
6 */
7
8 #include <linux/spi/spi.h>
9 #include <linux/module.h>
10 #include <linux/regmap.h>
11
12 #include "st7571.h"
13
14 static const struct regmap_config st7571_spi_regmap_config = {
15 .reg_bits = 8,
16 .val_bits = 8,
17 .can_multi_write = true,
18 };
19
st7571_spi_probe(struct spi_device * spi)20 static int st7571_spi_probe(struct spi_device *spi)
21 {
22 struct st7571_device *st7571;
23 struct regmap *regmap;
24
25 regmap = devm_regmap_init_spi(spi, &st7571_spi_regmap_config);
26 if (IS_ERR(regmap)) {
27 return dev_err_probe(&spi->dev, PTR_ERR(regmap),
28 "Failed to initialize regmap\n");
29 }
30
31 st7571 = st7571_probe(&spi->dev, regmap);
32 if (IS_ERR(st7571))
33 return dev_err_probe(&spi->dev, PTR_ERR(st7571),
34 "Failed to initialize regmap\n");
35
36 spi_set_drvdata(spi, st7571);
37 return 0;
38 }
39
st7571_spi_remove(struct spi_device * spi)40 static void st7571_spi_remove(struct spi_device *spi)
41 {
42 struct st7571_device *st7571 = spi_get_drvdata(spi);
43
44 st7571_remove(st7571);
45 }
46
47 static const struct of_device_id st7571_of_match[] = {
48 { .compatible = "sitronix,st7567", .data = &st7567_config },
49 { .compatible = "sitronix,st7571", .data = &st7571_config },
50 {},
51 };
52 MODULE_DEVICE_TABLE(of, st7571_of_match);
53
54 static const struct spi_device_id st7571_spi_id[] = {
55 { "st7567", 0 },
56 { "st7571", 0 },
57 { }
58 };
59 MODULE_DEVICE_TABLE(spi, st7571_spi_id);
60
61 static struct spi_driver st7571_spi_driver = {
62 .driver = {
63 .name = "st7571-spi",
64 .of_match_table = st7571_of_match,
65 },
66 .probe = st7571_spi_probe,
67 .remove = st7571_spi_remove,
68 .id_table = st7571_spi_id,
69 };
70
71 module_spi_driver(st7571_spi_driver);
72
73 MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
74 MODULE_DESCRIPTION("DRM Driver for Sitronix ST7571 LCD controller (SPI)");
75 MODULE_LICENSE("GPL");
76 MODULE_IMPORT_NS("DRM_ST7571");
77