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 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 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