c440eee1a7
This switches the fbtft driver to use GPIO descriptors rather than numerical gpios: Utilize the GPIO library's intrinsic handling of OF GPIOs and polarity. If the line is flagged active low, gpiolib will deal with this. Remove gpios from platform device structure. Neither assign statically numbers to gpios in platform device nor allow gpios to be parsed as module parameters. Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* FB driver for the ILI9340 LCD Controller
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*
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* Copyright (C) 2013 Noralf Tronnes
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/gpio/consumer.h>
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#include <linux/delay.h>
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#include <video/mipi_display.h>
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#include "fbtft.h"
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#define DRVNAME "fb_ili9340"
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#define WIDTH 240
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#define HEIGHT 320
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/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
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static int init_display(struct fbtft_par *par)
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{
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par->fbtftops.reset(par);
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write_reg(par, 0xEF, 0x03, 0x80, 0x02);
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write_reg(par, 0xCF, 0x00, 0XC1, 0X30);
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write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81);
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write_reg(par, 0xE8, 0x85, 0x00, 0x78);
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write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02);
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write_reg(par, 0xF7, 0x20);
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write_reg(par, 0xEA, 0x00, 0x00);
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/* Power Control 1 */
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write_reg(par, 0xC0, 0x23);
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/* Power Control 2 */
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write_reg(par, 0xC1, 0x10);
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/* VCOM Control 1 */
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write_reg(par, 0xC5, 0x3e, 0x28);
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/* VCOM Control 2 */
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write_reg(par, 0xC7, 0x86);
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/* COLMOD: Pixel Format Set */
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/* 16 bits/pixel */
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write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
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/* Frame Rate Control */
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/* Division ratio = fosc, Frame Rate = 79Hz */
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write_reg(par, 0xB1, 0x00, 0x18);
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/* Display Function Control */
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write_reg(par, 0xB6, 0x08, 0x82, 0x27);
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/* Gamma Function Disable */
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write_reg(par, 0xF2, 0x00);
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/* Gamma curve selection */
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write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
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/* Positive Gamma Correction */
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write_reg(par, 0xE0,
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0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
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0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
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/* Negative Gamma Correction */
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write_reg(par, 0xE1,
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0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
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0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
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write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
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mdelay(120);
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write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
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return 0;
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}
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static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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{
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write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
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xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
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write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
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ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
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write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
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}
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#define ILI9340_MADCTL_MV 0x20
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#define ILI9340_MADCTL_MX 0x40
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#define ILI9340_MADCTL_MY 0x80
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static int set_var(struct fbtft_par *par)
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{
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u8 val;
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switch (par->info->var.rotate) {
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case 270:
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val = ILI9340_MADCTL_MV;
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break;
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case 180:
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val = ILI9340_MADCTL_MY;
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break;
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case 90:
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val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX;
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break;
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default:
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val = ILI9340_MADCTL_MX;
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break;
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}
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/* Memory Access Control */
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val | (par->bgr << 3));
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return 0;
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}
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static struct fbtft_display display = {
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.regwidth = 8,
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.width = WIDTH,
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.height = HEIGHT,
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.fbtftops = {
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.init_display = init_display,
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.set_addr_win = set_addr_win,
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.set_var = set_var,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9340", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("platform:" DRVNAME);
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MODULE_ALIAS("spi:ili9340");
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MODULE_ALIAS("platform:ili9340");
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MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller");
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MODULE_AUTHOR("Noralf Tronnes");
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MODULE_LICENSE("GPL");
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