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fbtft_device.c
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// SPDX-License-Identifier: GPL-2.0+
/*
*
* Copyright (C) 2013, Noralf Tronnes
*/
#define pr_fmt(fmt) "fbtft_device: " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio/consumer.h>
#include <linux/spi/spi.h>
#include <video/mipi_display.h>
#include "fbtft.h"
#define MAX_GPIOS 32
static struct spi_device *spi_device;
static struct platform_device *p_device;
static char *name;
module_param(name, charp, 0000);
MODULE_PARM_DESC(name,
"Devicename (required). name=list => list all supported devices.");
static unsigned int rotate;
module_param(rotate, uint, 0000);
MODULE_PARM_DESC(rotate,
"Angle to rotate display counter clockwise: 0, 90, 180, 270");
static unsigned int busnum;
module_param(busnum, uint, 0000);
MODULE_PARM_DESC(busnum, "SPI bus number (default=0)");
static unsigned int cs;
module_param(cs, uint, 0000);
MODULE_PARM_DESC(cs, "SPI chip select (default=0)");
static unsigned int speed;
module_param(speed, uint, 0000);
MODULE_PARM_DESC(speed, "SPI speed (override device default)");
static int mode = -1;
module_param(mode, int, 0000);
MODULE_PARM_DESC(mode, "SPI mode (override device default)");
static unsigned int fps;
module_param(fps, uint, 0000);
MODULE_PARM_DESC(fps, "Frames per second (override driver default)");
static char *gamma;
module_param(gamma, charp, 0000);
MODULE_PARM_DESC(gamma,
"String representation of Gamma Curve(s). Driver specific.");
static int txbuflen;
module_param(txbuflen, int, 0000);
MODULE_PARM_DESC(txbuflen, "txbuflen (override driver default)");
static int bgr = -1;
module_param(bgr, int, 0000);
MODULE_PARM_DESC(bgr,
"BGR bit (supported by some drivers).");
static unsigned int startbyte;
module_param(startbyte, uint, 0000);
MODULE_PARM_DESC(startbyte, "Sets the Start byte used by some SPI displays.");
static bool custom;
module_param(custom, bool, 0000);
MODULE_PARM_DESC(custom, "Add a custom display device. Use speed= argument to make it a SPI device, else platform_device");
static unsigned int width;
module_param(width, uint, 0000);
MODULE_PARM_DESC(width, "Display width, used with the custom argument");
static unsigned int height;
module_param(height, uint, 0000);
MODULE_PARM_DESC(height, "Display height, used with the custom argument");
static unsigned int buswidth = 8;
module_param(buswidth, uint, 0000);
MODULE_PARM_DESC(buswidth, "Display bus width, used with the custom argument");
static s16 init[FBTFT_MAX_INIT_SEQUENCE];
static int init_num;
module_param_array(init, short, &init_num, 0000);
MODULE_PARM_DESC(init, "Init sequence, used with the custom argument");
static unsigned long debug;
module_param(debug, ulong, 0000);
MODULE_PARM_DESC(debug,
"level: 0-7 (the remaining 29 bits is for advanced usage)");
static unsigned int verbose = 3;
module_param(verbose, uint, 0000);
MODULE_PARM_DESC(verbose,
"0 silent, >1 show devices, >2 show devices before (default=3)");
struct fbtft_device_display {
char *name;
struct spi_board_info *spi;
struct platform_device *pdev;
};
static void fbtft_device_pdev_release(struct device *dev);
static int write_gpio16_wr_slow(struct fbtft_par *par, void *buf, size_t len);
static void adafruit18_green_tab_set_addr_win(struct fbtft_par *par,
int xs, int ys, int xe, int ye);
#define ADAFRUIT18_GAMMA \
"02 1c 07 12 37 32 29 2d 29 25 2B 39 00 01 03 10\n" \
"03 1d 07 06 2E 2C 29 2D 2E 2E 37 3F 00 00 02 10"
#define CBERRY28_GAMMA \
"D0 00 14 15 13 2C 42 43 4E 09 16 14 18 21\n" \
"D0 00 14 15 13 0B 43 55 53 0C 17 14 23 20"
static const s16 cberry28_init_sequence[] = {
/* turn off sleep mode */
-1, MIPI_DCS_EXIT_SLEEP_MODE,
-2, 120,
/* set pixel format to RGB-565 */
-1, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT,
-1, 0xB2, 0x0C, 0x0C, 0x00, 0x33, 0x33,
/*
* VGH = 13.26V
* VGL = -10.43V
*/
-1, 0xB7, 0x35,
/*
* VDV and VRH register values come from command write
* (instead of NVM)
*/
-1, 0xC2, 0x01, 0xFF,
/*
* VAP = 4.7V + (VCOM + VCOM offset + 0.5 * VDV)
* VAN = -4.7V + (VCOM + VCOM offset + 0.5 * VDV)
*/
-1, 0xC3, 0x17,
/* VDV = 0V */
-1, 0xC4, 0x20,
/* VCOM = 0.675V */
-1, 0xBB, 0x17,
/* VCOM offset = 0V */
-1, 0xC5, 0x20,
/*
* AVDD = 6.8V
* AVCL = -4.8V
* VDS = 2.3V
*/
-1, 0xD0, 0xA4, 0xA1,
-1, MIPI_DCS_SET_DISPLAY_ON,
-3,
};
static const s16 hy28b_init_sequence[] = {
-1, 0x00e7, 0x0010, -1, 0x0000, 0x0001,
-1, 0x0001, 0x0100, -1, 0x0002, 0x0700,
-1, 0x0003, 0x1030, -1, 0x0004, 0x0000,
-1, 0x0008, 0x0207, -1, 0x0009, 0x0000,
-1, 0x000a, 0x0000, -1, 0x000c, 0x0001,
-1, 0x000d, 0x0000, -1, 0x000f, 0x0000,
-1, 0x0010, 0x0000, -1, 0x0011, 0x0007,
-1, 0x0012, 0x0000, -1, 0x0013, 0x0000,
-2, 50, -1, 0x0010, 0x1590, -1, 0x0011,
0x0227, -2, 50, -1, 0x0012, 0x009c, -2, 50,
-1, 0x0013, 0x1900, -1, 0x0029, 0x0023,
-1, 0x002b, 0x000e, -2, 50,
-1, 0x0020, 0x0000, -1, 0x0021, 0x0000,
-2, 50, -1, 0x0050, 0x0000,
-1, 0x0051, 0x00ef, -1, 0x0052, 0x0000,
-1, 0x0053, 0x013f, -1, 0x0060, 0xa700,
-1, 0x0061, 0x0001, -1, 0x006a, 0x0000,
-1, 0x0080, 0x0000, -1, 0x0081, 0x0000,
-1, 0x0082, 0x0000, -1, 0x0083, 0x0000,
-1, 0x0084, 0x0000, -1, 0x0085, 0x0000,
-1, 0x0090, 0x0010, -1, 0x0092, 0x0000,
-1, 0x0093, 0x0003, -1, 0x0095, 0x0110,
-1, 0x0097, 0x0000, -1, 0x0098, 0x0000,
-1, 0x0007, 0x0133, -1, 0x0020, 0x0000,
-1, 0x0021, 0x0000, -2, 100, -3 };
#define HY28B_GAMMA \
"04 1F 4 7 7 0 7 7 6 0\n" \
"0F 00 1 7 4 0 0 0 6 7"
static const s16 pitft_init_sequence[] = {
-1, MIPI_DCS_SOFT_RESET,
-2, 5,
-1, MIPI_DCS_SET_DISPLAY_OFF,
-1, 0xEF, 0x03, 0x80, 0x02,
-1, 0xCF, 0x00, 0xC1, 0x30,
-1, 0xED, 0x64, 0x03, 0x12, 0x81,
-1, 0xE8, 0x85, 0x00, 0x78,
-1, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
-1, 0xF7, 0x20,
-1, 0xEA, 0x00, 0x00,
-1, 0xC0, 0x23,
-1, 0xC1, 0x10,
-1, 0xC5, 0x3E, 0x28,
-1, 0xC7, 0x86,
-1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
-1, 0xB1, 0x00, 0x18,
-1, 0xB6, 0x08, 0x82, 0x27,
-1, 0xF2, 0x00,
-1, MIPI_DCS_SET_GAMMA_CURVE, 0x01,
-1, 0xE0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E,
0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
-1, 0xE1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31,
0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
-1, MIPI_DCS_EXIT_SLEEP_MODE,
-2, 100,
-1, MIPI_DCS_SET_DISPLAY_ON,
-2, 20,
-3
};
static const s16 waveshare32b_init_sequence[] = {
-1, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
-1, 0xCF, 0x00, 0xC1, 0x30,
-1, 0xE8, 0x85, 0x00, 0x78,
-1, 0xEA, 0x00, 0x00,
-1, 0xED, 0x64, 0x03, 0x12, 0x81,
-1, 0xF7, 0x20,
-1, 0xC0, 0x23,
-1, 0xC1, 0x10,
-1, 0xC5, 0x3E, 0x28,
-1, 0xC7, 0x86,
-1, MIPI_DCS_SET_ADDRESS_MODE, 0x28,
-1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
-1, 0xB1, 0x00, 0x18,
-1, 0xB6, 0x08, 0x82, 0x27,
-1, 0xF2, 0x00,
-1, MIPI_DCS_SET_GAMMA_CURVE, 0x01,
-1, 0xE0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E,
0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
-1, 0xE1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31,
0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
-1, MIPI_DCS_EXIT_SLEEP_MODE,
-2, 120,
-1, MIPI_DCS_SET_DISPLAY_ON,
-1, MIPI_DCS_WRITE_MEMORY_START,
-3
};
#define PIOLED_GAMMA "0 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 " \
"2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 " \
"3 3 3 4 4 4 4 4 4 4 4 4 4 4 4"
/* Supported displays in alphabetical order */
static struct fbtft_device_display displays[] = {
{
.name = "adafruit18",
.spi = &(struct spi_board_info) {
.modalias = "fb_st7735r",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.gamma = ADAFRUIT18_GAMMA,
}
}
}, {
.name = "adafruit18_green",
.spi = &(struct spi_board_info) {
.modalias = "fb_st7735r",
.max_speed_hz = 4000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.fbtftops.set_addr_win =
adafruit18_green_tab_set_addr_win,
},
.bgr = true,
.gamma = ADAFRUIT18_GAMMA,
}
}
}, {
.name = "adafruit22",
.spi = &(struct spi_board_info) {
.modalias = "fb_hx8340bn",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 9,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "adafruit22a",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9340",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "adafruit28",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9341",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "adafruit13m",
.spi = &(struct spi_board_info) {
.modalias = "fb_ssd1306",
.max_speed_hz = 16000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "admatec_c-berry28",
.spi = &(struct spi_board_info) {
.modalias = "fb_st7789v",
.max_speed_hz = 48000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.init_sequence = cberry28_init_sequence,
},
.gamma = CBERRY28_GAMMA,
}
}
}, {
.name = "agm1264k-fl",
.pdev = &(struct platform_device) {
.name = "fb_agm1264k-fl",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = FBTFT_ONBOARD_BACKLIGHT,
},
},
}
}
}, {
.name = "dogs102",
.spi = &(struct spi_board_info) {
.modalias = "fb_uc1701",
.max_speed_hz = 8000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
.bgr = true,
}
}
}, {
.name = "er_tftm050_2",
.spi = &(struct spi_board_info) {
.modalias = "fb_ra8875",
.max_speed_hz = 5000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.width = 480,
.height = 272,
},
.bgr = true,
}
}
}, {
.name = "er_tftm070_5",
.spi = &(struct spi_board_info) {
.modalias = "fb_ra8875",
.max_speed_hz = 5000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.width = 800,
.height = 480,
},
.bgr = true,
}
}
}, {
.name = "ew24ha0",
.spi = &(struct spi_board_info) {
.modalias = "fb_uc1611",
.max_speed_hz = 32000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "ew24ha0_9bit",
.spi = &(struct spi_board_info) {
.modalias = "fb_uc1611",
.max_speed_hz = 32000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 9,
},
}
}
}, {
.name = "flexfb",
.spi = &(struct spi_board_info) {
.modalias = "flexfb",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
}
}, {
.name = "flexpfb",
.pdev = &(struct platform_device) {
.name = "flexpfb",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
}
}
}, {
.name = "freetronicsoled128",
.spi = &(struct spi_board_info) {
.modalias = "fb_ssd1351",
.max_speed_hz = 20000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = FBTFT_ONBOARD_BACKLIGHT,
},
.bgr = true,
}
}
}, {
.name = "hx8353d",
.spi = &(struct spi_board_info) {
.modalias = "fb_hx8353d",
.max_speed_hz = 16000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
}
}
}, {
.name = "hy28a",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9320",
.max_speed_hz = 32000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.startbyte = 0x70,
.bgr = true,
}
}
}, {
.name = "hy28b",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9325",
.max_speed_hz = 48000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.init_sequence = hy28b_init_sequence,
},
.startbyte = 0x70,
.bgr = true,
.fps = 50,
.gamma = HY28B_GAMMA,
}
}
}, {
.name = "ili9481",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9481",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.regwidth = 16,
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "itdb24",
.pdev = &(struct platform_device) {
.name = "fb_s6d1121",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = false,
},
}
}
}, {
.name = "itdb28",
.pdev = &(struct platform_device) {
.name = "fb_ili9325",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
},
}
}
}, {
.name = "itdb28_spi",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9325",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "kedei62",
.spi = &(struct spi_board_info) {
.modalias = "kedei62",
.max_speed_hz = 39000000,
.mode = SPI_MODE_0,
.chip_select = 1,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "mi0283qt-2",
.spi = &(struct spi_board_info) {
.modalias = "fb_hx8347d",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.startbyte = 0x70,
.bgr = true,
}
}
}, {
.name = "mi0283qt-9a",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9341",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 9,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "mi0283qt-v2",
.spi = &(struct spi_board_info) {
.modalias = "fb_watterott",
.max_speed_hz = 4000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
}
}
}, {
.name = "nokia3310",
.spi = &(struct spi_board_info) {
.modalias = "fb_pcd8544",
.max_speed_hz = 400000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "nokia3310a",
.spi = &(struct spi_board_info) {
.modalias = "fb_tls8204",
.max_speed_hz = 1000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "nokia5110",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9163",
.max_speed_hz = 12000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "piscreen",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9486",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.regwidth = 16,
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "pitft",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9340",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.chip_select = 0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.init_sequence = pitft_init_sequence,
},
.bgr = true,
}
}
}, {
.name = "pioled",
.spi = &(struct spi_board_info) {
.modalias = "fb_ssd1351",
.max_speed_hz = 20000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
.bgr = true,
.gamma = PIOLED_GAMMA
}
}
}, {
.name = "rpi-display",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9341",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "s6d02a1",
.spi = &(struct spi_board_info) {
.modalias = "fb_s6d02a1",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "sainsmart18",
.spi = &(struct spi_board_info) {
.modalias = "fb_st7735r",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "sainsmart32",
.pdev = &(struct platform_device) {
.name = "fb_ssd1289",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 16,
.txbuflen = -2, /* disable buffer */
.backlight = 1,
.fbtftops.write = write_gpio16_wr_slow,
},
.bgr = true,
},
},
}
}, {
.name = "sainsmart32_fast",
.pdev = &(struct platform_device) {
.name = "fb_ssd1289",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 16,
.txbuflen = -2, /* disable buffer */
.backlight = 1,
},
.bgr = true,
},
},
}
}, {
.name = "sainsmart32_latched",
.pdev = &(struct platform_device) {
.name = "fb_ssd1289",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 16,
.txbuflen = -2, /* disable buffer */
.backlight = 1,
.fbtftops.write =
fbtft_write_gpio16_wr_latched,
},
.bgr = true,
},
},
}
}, {
.name = "sainsmart32_spi",
.spi = &(struct spi_board_info) {
.modalias = "fb_ssd1289",
.max_speed_hz = 16000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "spidev",
.spi = &(struct spi_board_info) {
.modalias = "spidev",
.max_speed_hz = 500000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
}
}
}, {
.name = "ssd1331",
.spi = &(struct spi_board_info) {
.modalias = "fb_ssd1331",
.max_speed_hz = 20000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "tinylcd35",
.spi = &(struct spi_board_info) {
.modalias = "fb_tinylcd",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "tm022hdh26",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9341",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "tontec35_9481", /* boards before 02 July 2014 */
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9481",
.max_speed_hz = 128000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "tontec35_9486", /* boards after 02 July 2014 */
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9486",
.max_speed_hz = 128000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
},
.bgr = true,
}
}
}, {
.name = "upd161704",
.spi = &(struct spi_board_info) {
.modalias = "fb_upd161704",
.max_speed_hz = 32000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
.name = "waveshare32b",
.spi = &(struct spi_board_info) {
.modalias = "fb_ili9340",
.max_speed_hz = 48000000,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
.backlight = 1,
.init_sequence =
waveshare32b_init_sequence,
},
.bgr = true,
}
}
}, {
.name = "waveshare22",
.spi = &(struct spi_board_info) {
.modalias = "fb_bd663474",
.max_speed_hz = 32000000,
.mode = SPI_MODE_3,
.platform_data = &(struct fbtft_platform_data) {
.display = {
.buswidth = 8,
},
}
}
}, {
/* This should be the last item.
* Used with the custom argument
*/
.name = "",
.spi = &(struct spi_board_info) {
.modalias = "",
.max_speed_hz = 0,
.mode = SPI_MODE_0,
.platform_data = &(struct fbtft_platform_data) {
}
},
.pdev = &(struct platform_device) {
.name = "",
.id = 0,
.dev = {
.release = fbtft_device_pdev_release,
.platform_data = &(struct fbtft_platform_data) {
},
},
},
}
};
static int write_gpio16_wr_slow(struct fbtft_par *par, void *buf, size_t len)
{
u16 data;
int i;
#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
static u16 prev_data;
#endif
fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
"%s(len=%zu): ", __func__, len);
while (len) {
data = *(u16 *)buf;
/* Start writing by pulling down /WR */
gpiod_set_value(par->gpio.wr, 0);
/* Set data */
#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
if (data == prev_data) {
gpiod_set_value(par->gpio.wr, 0); /* used as delay */
} else {
for (i = 0; i < 16; i++) {
if ((data & 1) != (prev_data & 1))
gpiod_set_value(par->gpio.db[i],
data & 1);
data >>= 1;
prev_data >>= 1;
}