c2a61865ba
The SPI access to s6e63m0 is using the DBI protocol, so switch to using the elaborate DBI protocol implementation in the DRM DBI helper library. Acked-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210614181135.1124445-2-linus.walleij@linaro.org
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/delay.h>
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#include <drm/drm_mipi_dbi.h>
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#include <drm/drm_print.h>
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#include "panel-samsung-s6e63m0.h"
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static const u8 s6e63m0_dbi_read_commands[] = {
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MCS_READ_ID1,
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MCS_READ_ID2,
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MCS_READ_ID3,
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0, /* sentinel */
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};
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static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp,
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const u8 cmd, u8 *data)
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{
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struct mipi_dbi *dbi = trsp;
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int ret;
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ret = mipi_dbi_command_read(dbi, cmd, data);
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if (ret)
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dev_err(dev, "error on DBI read command %02x\n", cmd);
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return ret;
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}
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static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp,
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const u8 *data, size_t len)
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{
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struct mipi_dbi *dbi = trsp;
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int ret;
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ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1));
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usleep_range(300, 310);
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return ret;
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}
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static int s6e63m0_spi_probe(struct spi_device *spi)
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{
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struct device *dev = &spi->dev;
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struct mipi_dbi *dbi;
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int ret;
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dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL);
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if (!dbi)
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return -ENOMEM;
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ret = mipi_dbi_spi_init(spi, dbi, NULL);
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if (ret)
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return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
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/* Register our custom MCS read commands */
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dbi->read_commands = s6e63m0_dbi_read_commands;
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return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read,
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s6e63m0_spi_dcs_write, false);
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}
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static int s6e63m0_spi_remove(struct spi_device *spi)
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{
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return s6e63m0_remove(&spi->dev);
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}
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static const struct of_device_id s6e63m0_spi_of_match[] = {
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{ .compatible = "samsung,s6e63m0" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match);
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static struct spi_driver s6e63m0_spi_driver = {
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.probe = s6e63m0_spi_probe,
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.remove = s6e63m0_spi_remove,
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.driver = {
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.name = "panel-samsung-s6e63m0",
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.of_match_table = s6e63m0_spi_of_match,
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},
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};
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module_spi_driver(s6e63m0_spi_driver);
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MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>");
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MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver");
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MODULE_LICENSE("GPL v2");
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