drm/panel/panel-samsung-s6e63m0-spi.c

0001 // SPDX-License-Identifier: GPL-2.0
0002
0003 #include <linux/device.h>
0004 #include <linux/module.h>
0005 #include <linux/spi/spi.h>
0006 #include <linux/delay.h>
0007
0008 #include <drm/drm_mipi_dbi.h>
0009 #include <drm/drm_print.h>
0010
0011 #include "panel-samsung-s6e63m0.h"
0012
0013 static const u8 s6e63m0_dbi_read_commands[] = {
0014     MCS_READ_ID1,
0015     MCS_READ_ID2,
0016     MCS_READ_ID3,
0017     0, /* sentinel */
0018 };
0019
0020 static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp,
0021                 const u8 cmd, u8 *data)
0022 {
0023     struct mipi_dbi *dbi = trsp;
0024     int ret;
0025
0026     ret = mipi_dbi_command_read(dbi, cmd, data);
0027     if (ret)
0028         dev_err(dev, "error on DBI read command %02x\n", cmd);
0029
0030     return ret;
0031 }
0032
0033 static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp,
0034                  const u8 *data, size_t len)
0035 {
0036     struct mipi_dbi *dbi = trsp;
0037     int ret;
0038
0039     ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1));
0040     usleep_range(300, 310);
0041
0042     return ret;
0043 }
0044
0045 static int s6e63m0_spi_probe(struct spi_device *spi)
0046 {
0047     struct device *dev = &spi->dev;
0048     struct mipi_dbi *dbi;
0049     int ret;
0050
0051     dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL);
0052     if (!dbi)
0053         return -ENOMEM;
0054
0055     ret = mipi_dbi_spi_init(spi, dbi, NULL);
0056     if (ret)
0057         return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
0058     /* Register our custom MCS read commands */
0059     dbi->read_commands = s6e63m0_dbi_read_commands;
0060
0061     return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read,
0062                  s6e63m0_spi_dcs_write, false);
0063 }
0064
0065 static void s6e63m0_spi_remove(struct spi_device *spi)
0066 {
0067     s6e63m0_remove(&spi->dev);
0068 }
0069
0070 static const struct of_device_id s6e63m0_spi_of_match[] = {
0071     { .compatible = "samsung,s6e63m0" },
0072     { /* sentinel */ }
0073 };
0074 MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match);
0075
0076 static struct spi_driver s6e63m0_spi_driver = {
0077     .probe          = s6e63m0_spi_probe,
0078     .remove         = s6e63m0_spi_remove,
0079     .driver         = {
0080         .name       = "panel-samsung-s6e63m0",
0081         .of_match_table = s6e63m0_spi_of_match,
0082     },
0083 };
0084 module_spi_driver(s6e63m0_spi_driver);
0085
0086 MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>");
0087 MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver");
0088 MODULE_LICENSE("GPL v2");