1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/device.h> 4 #include <linux/module.h> 5 #include <linux/spi/spi.h> 6 #include <linux/delay.h> 7 8 #include <drm/drm_mipi_dbi.h> 9 #include <drm/drm_print.h> 10 11 #include "panel-samsung-s6e63m0.h" 12 13 static const u8 s6e63m0_dbi_read_commands[] = { 14 MCS_READ_ID1, 15 MCS_READ_ID2, 16 MCS_READ_ID3, 17 0, /* sentinel */ 18 }; 19 20 static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp, 21 const u8 cmd, u8 *data) 22 { 23 struct mipi_dbi *dbi = trsp; 24 int ret; 25 26 ret = mipi_dbi_command_read(dbi, cmd, data); 27 if (ret) 28 dev_err(dev, "error on DBI read command %02x\n", cmd); 29 30 return ret; 31 } 32 33 static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp, 34 const u8 *data, size_t len) 35 { 36 struct mipi_dbi *dbi = trsp; 37 int ret; 38 39 ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1)); 40 usleep_range(300, 310); 41 42 return ret; 43 } 44 45 static int s6e63m0_spi_probe(struct spi_device *spi) 46 { 47 struct device *dev = &spi->dev; 48 struct mipi_dbi *dbi; 49 int ret; 50 51 dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL); 52 if (!dbi) 53 return -ENOMEM; 54 55 ret = mipi_dbi_spi_init(spi, dbi, NULL); 56 if (ret) 57 return dev_err_probe(dev, ret, "MIPI DBI init failed\n"); 58 /* Register our custom MCS read commands */ 59 dbi->read_commands = s6e63m0_dbi_read_commands; 60 61 return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read, 62 s6e63m0_spi_dcs_write, false); 63 } 64 65 static void s6e63m0_spi_remove(struct spi_device *spi) 66 { 67 s6e63m0_remove(&spi->dev); 68 } 69 70 static const struct of_device_id s6e63m0_spi_of_match[] = { 71 { .compatible = "samsung,s6e63m0" }, 72 { /* sentinel */ } 73 }; 74 MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match); 75 76 static struct spi_driver s6e63m0_spi_driver = { 77 .probe = s6e63m0_spi_probe, 78 .remove = s6e63m0_spi_remove, 79 .driver = { 80 .name = "panel-samsung-s6e63m0", 81 .of_match_table = s6e63m0_spi_of_match, 82 }, 83 }; 84 module_spi_driver(s6e63m0_spi_driver); 85 86 MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>"); 87 MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver"); 88 MODULE_LICENSE("GPL v2"); 89