144 lines
3.6 KiB
C
144 lines
3.6 KiB
C
/*
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* Copyright (C) 2010 Texas Instruments Inc.
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*
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* Modified from mach-omap2/board-zoom-peripherals.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/i2c/twl.h>
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#include <linux/spi/spi.h>
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#include <plat/mcspi.h>
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#include <video/omapdss.h>
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#define LCD_PANEL_RESET_GPIO_PROD 96
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#define LCD_PANEL_RESET_GPIO_PILOT 55
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#define LCD_PANEL_QVGA_GPIO 56
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static struct gpio zoom_lcd_gpios[] __initdata = {
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{ -EINVAL, GPIOF_OUT_INIT_HIGH, "lcd reset" },
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{ LCD_PANEL_QVGA_GPIO, GPIOF_OUT_INIT_HIGH, "lcd qvga" },
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};
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static void __init zoom_lcd_panel_init(void)
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{
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zoom_lcd_gpios[0].gpio = (omap_rev() > OMAP3430_REV_ES3_0) ?
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LCD_PANEL_RESET_GPIO_PROD :
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LCD_PANEL_RESET_GPIO_PILOT;
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if (gpio_request_array(zoom_lcd_gpios, ARRAY_SIZE(zoom_lcd_gpios)))
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pr_err("%s: Failed to get LCD GPIOs.\n", __func__);
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}
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static int zoom_panel_enable_lcd(struct omap_dss_device *dssdev)
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{
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return 0;
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}
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static void zoom_panel_disable_lcd(struct omap_dss_device *dssdev)
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{
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}
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/*
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* PWMA/B register offsets (TWL4030_MODULE_PWMA)
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*/
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#define TWL_INTBR_PMBR1 0xD
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#define TWL_INTBR_GPBR1 0xC
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#define TWL_LED_PWMON 0x0
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#define TWL_LED_PWMOFF 0x1
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static int zoom_set_bl_intensity(struct omap_dss_device *dssdev, int level)
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{
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#ifdef CONFIG_TWL4030_CORE
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unsigned char c;
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u8 mux_pwm, enb_pwm;
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if (level > 100)
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return -1;
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twl_i2c_read_u8(TWL4030_MODULE_INTBR, &mux_pwm, TWL_INTBR_PMBR1);
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twl_i2c_read_u8(TWL4030_MODULE_INTBR, &enb_pwm, TWL_INTBR_GPBR1);
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if (level == 0) {
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/* disable pwm1 output and clock */
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enb_pwm = enb_pwm & 0xF5;
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/* change pwm1 pin to gpio pin */
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mux_pwm = mux_pwm & 0xCF;
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twl_i2c_write_u8(TWL4030_MODULE_INTBR,
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enb_pwm, TWL_INTBR_GPBR1);
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twl_i2c_write_u8(TWL4030_MODULE_INTBR,
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mux_pwm, TWL_INTBR_PMBR1);
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return 0;
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}
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if (!((enb_pwm & 0xA) && (mux_pwm & 0x30))) {
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/* change gpio pin to pwm1 pin */
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mux_pwm = mux_pwm | 0x30;
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/* enable pwm1 output and clock*/
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enb_pwm = enb_pwm | 0x0A;
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twl_i2c_write_u8(TWL4030_MODULE_INTBR,
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mux_pwm, TWL_INTBR_PMBR1);
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twl_i2c_write_u8(TWL4030_MODULE_INTBR,
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enb_pwm, TWL_INTBR_GPBR1);
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}
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c = ((50 * (100 - level)) / 100) + 1;
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twl_i2c_write_u8(TWL4030_MODULE_PWM1, 0x7F, TWL_LED_PWMOFF);
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twl_i2c_write_u8(TWL4030_MODULE_PWM1, c, TWL_LED_PWMON);
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#else
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pr_warn("Backlight not enabled\n");
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#endif
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return 0;
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}
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static struct omap_dss_device zoom_lcd_device = {
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.name = "lcd",
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.driver_name = "NEC_8048_panel",
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.type = OMAP_DISPLAY_TYPE_DPI,
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.phy.dpi.data_lines = 24,
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.platform_enable = zoom_panel_enable_lcd,
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.platform_disable = zoom_panel_disable_lcd,
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.max_backlight_level = 100,
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.set_backlight = zoom_set_bl_intensity,
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};
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static struct omap_dss_device *zoom_dss_devices[] = {
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&zoom_lcd_device,
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};
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static struct omap_dss_board_info zoom_dss_data = {
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.num_devices = ARRAY_SIZE(zoom_dss_devices),
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.devices = zoom_dss_devices,
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.default_device = &zoom_lcd_device,
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};
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static struct omap2_mcspi_device_config dss_lcd_mcspi_config = {
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.turbo_mode = 1,
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};
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static struct spi_board_info nec_8048_spi_board_info[] __initdata = {
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[0] = {
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.modalias = "nec_8048_spi",
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.bus_num = 1,
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.chip_select = 2,
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.max_speed_hz = 375000,
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.controller_data = &dss_lcd_mcspi_config,
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},
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};
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void __init zoom_display_init(void)
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{
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omap_display_init(&zoom_dss_data);
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spi_register_board_info(nec_8048_spi_board_info,
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ARRAY_SIZE(nec_8048_spi_board_info));
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zoom_lcd_panel_init();
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}
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