1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * DRM driver for Solomon SSD130x OLED displays (I2C bus) 4 * 5 * Copyright 2022 Red Hat Inc. 6 * Author: Javier Martinez Canillas <javierm@redhat.com> 7 * 8 * Based on drivers/video/fbdev/ssd1307fb.c 9 * Copyright 2012 Free Electrons 10 */ 11 #include <linux/i2c.h> 12 #include <linux/module.h> 13 14 #include "ssd130x.h" 15 16 #define DRIVER_NAME "ssd130x-i2c" 17 #define DRIVER_DESC "DRM driver for Solomon SSD130x OLED displays (I2C)" 18 19 static const struct regmap_config ssd130x_i2c_regmap_config = { 20 .reg_bits = 8, 21 .val_bits = 8, 22 }; 23 24 static int ssd130x_i2c_probe(struct i2c_client *client) 25 { 26 struct ssd130x_device *ssd130x; 27 struct regmap *regmap; 28 29 regmap = devm_regmap_init_i2c(client, &ssd130x_i2c_regmap_config); 30 if (IS_ERR(regmap)) 31 return PTR_ERR(regmap); 32 33 ssd130x = ssd130x_probe(&client->dev, regmap); 34 if (IS_ERR(ssd130x)) 35 return PTR_ERR(ssd130x); 36 37 i2c_set_clientdata(client, ssd130x); 38 39 return 0; 40 } 41 42 static void ssd130x_i2c_remove(struct i2c_client *client) 43 { 44 struct ssd130x_device *ssd130x = i2c_get_clientdata(client); 45 46 ssd130x_remove(ssd130x); 47 } 48 49 static void ssd130x_i2c_shutdown(struct i2c_client *client) 50 { 51 struct ssd130x_device *ssd130x = i2c_get_clientdata(client); 52 53 ssd130x_shutdown(ssd130x); 54 } 55 56 static const struct of_device_id ssd130x_of_match[] = { 57 { 58 .compatible = "sinowealth,sh1106", 59 .data = &ssd130x_variants[SH1106_ID], 60 }, 61 { 62 .compatible = "solomon,ssd1305", 63 .data = &ssd130x_variants[SSD1305_ID], 64 }, 65 { 66 .compatible = "solomon,ssd1306", 67 .data = &ssd130x_variants[SSD1306_ID], 68 }, 69 { 70 .compatible = "solomon,ssd1307", 71 .data = &ssd130x_variants[SSD1307_ID], 72 }, 73 { 74 .compatible = "solomon,ssd1309", 75 .data = &ssd130x_variants[SSD1309_ID], 76 }, 77 /* Deprecated but kept for backward compatibility */ 78 { 79 .compatible = "solomon,ssd1305fb-i2c", 80 .data = &ssd130x_variants[SSD1305_ID], 81 }, 82 { 83 .compatible = "solomon,ssd1306fb-i2c", 84 .data = &ssd130x_variants[SSD1306_ID], 85 }, 86 { 87 .compatible = "solomon,ssd1307fb-i2c", 88 .data = &ssd130x_variants[SSD1307_ID], 89 }, 90 { 91 .compatible = "solomon,ssd1309fb-i2c", 92 .data = &ssd130x_variants[SSD1309_ID], 93 }, 94 { /* sentinel */ } 95 }; 96 MODULE_DEVICE_TABLE(of, ssd130x_of_match); 97 98 static struct i2c_driver ssd130x_i2c_driver = { 99 .driver = { 100 .name = DRIVER_NAME, 101 .of_match_table = ssd130x_of_match, 102 }, 103 .probe = ssd130x_i2c_probe, 104 .remove = ssd130x_i2c_remove, 105 .shutdown = ssd130x_i2c_shutdown, 106 }; 107 module_i2c_driver(ssd130x_i2c_driver); 108 109 MODULE_DESCRIPTION(DRIVER_DESC); 110 MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>"); 111 MODULE_LICENSE("GPL v2"); 112 MODULE_IMPORT_NS(DRM_SSD130X); 113