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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/staging/fbtft/fb_ili9481.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/staging/fbtft/fb_ili9481.c')
-rw-r--r-- | drivers/staging/fbtft/fb_ili9481.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/staging/fbtft/fb_ili9481.c b/drivers/staging/fbtft/fb_ili9481.c new file mode 100644 index 000000000..19eba085e --- /dev/null +++ b/drivers/staging/fbtft/fb_ili9481.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * FB driver for the ILI9481 LCD Controller + * + * Copyright (c) 2014 Petr Olivka + * Copyright (c) 2013 Noralf Tronnes + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <video/mipi_display.h> + +#include "fbtft.h" + +#define DRVNAME "fb_ili9481" +#define WIDTH 320 +#define HEIGHT 480 + +static const s16 default_init_sequence[] = { + /* SLP_OUT - Sleep out */ + -1, MIPI_DCS_EXIT_SLEEP_MODE, + -2, 50, + /* Power setting */ + -1, 0xD0, 0x07, 0x42, 0x18, + /* VCOM */ + -1, 0xD1, 0x00, 0x07, 0x10, + /* Power setting for norm. mode */ + -1, 0xD2, 0x01, 0x02, + /* Panel driving setting */ + -1, 0xC0, 0x10, 0x3B, 0x00, 0x02, 0x11, + /* Frame rate & inv. */ + -1, 0xC5, 0x03, + /* Pixel format */ + -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55, + /* Gamma */ + -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16, + 0x37, 0x75, 0x77, 0x54, 0x0C, 0x00, + /* DISP_ON */ + -1, MIPI_DCS_SET_DISPLAY_ON, + -3 +}; + +static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) +{ + write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, + xs >> 8, xs & 0xff, xe >> 8, xe & 0xff); + + write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, + ys >> 8, ys & 0xff, ye >> 8, ye & 0xff); + + write_reg(par, MIPI_DCS_WRITE_MEMORY_START); +} + +#define HFLIP 0x01 +#define VFLIP 0x02 +#define ROW_X_COL 0x20 +static int set_var(struct fbtft_par *par) +{ + switch (par->info->var.rotate) { + case 270: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + ROW_X_COL | HFLIP | VFLIP | (par->bgr << 3)); + break; + case 180: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + VFLIP | (par->bgr << 3)); + break; + case 90: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + ROW_X_COL | (par->bgr << 3)); + break; + default: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + HFLIP | (par->bgr << 3)); + break; + } + + return 0; +} + +static struct fbtft_display display = { + .regwidth = 8, + .width = WIDTH, + .height = HEIGHT, + .init_sequence = default_init_sequence, + .fbtftops = { + .set_addr_win = set_addr_win, + .set_var = set_var, + }, +}; + +FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display); + +MODULE_ALIAS("spi:" DRVNAME); +MODULE_ALIAS("platform:" DRVNAME); +MODULE_ALIAS("spi:ili9481"); +MODULE_ALIAS("platform:ili9481"); + +MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller"); +MODULE_AUTHOR("Petr Olivka"); +MODULE_LICENSE("GPL"); |