LXR linux/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c

   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
  13static const u8 s6e63m0_dbi_read_commands[] = {
  14        MCS_READ_ID1,
  15        MCS_READ_ID2,
  16        MCS_READ_ID3,
  17        0, /* sentinel */
  18};
  19
  20static 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
  33static 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
  45static 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
  65static int s6e63m0_spi_remove(struct spi_device *spi)
  66{
  67        return s6e63m0_remove(&spi->dev);
  68}
  69
  70static const struct of_device_id s6e63m0_spi_of_match[] = {
  71        { .compatible = "samsung,s6e63m0" },
  72        { /* sentinel */ }
  73};
  74MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match);
  75
  76static 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};
  84module_spi_driver(s6e63m0_spi_driver);
  85
  86MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>");
  87MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver");
  88MODULE_LICENSE("GPL v2");
  89