u-boot/board/toradex/colibri_t30/colibri_t30.c
Gerard Salvatella a3c9021771 board: toradex: turn off lcd backlight before OS handover
U-Boot typically tears down the display controller before handing
control over to Linux. On LCD displays disabling pixel clock leads to a
fading out effect with vertical/horizontal lines. Make sure to disable
back light before booting Linux.

Signed-off-by: Gerard Salvatella <gerard.salvatella@toradex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2019-02-20 09:01:45 -07:00

77 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2014-2016
* Stefan Agner <stefan@agner.ch>
*/
#include <common.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch/pinmux.h>
#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/tegra.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <i2c.h>
#include "pinmux-config-colibri_t30.h"
#include "../common/tdx-common.h"
int arch_misc_init(void)
{
if (readl(NV_PA_BASE_SRAM + NVBOOTINFOTABLE_BOOTTYPE) ==
NVBOOTTYPE_RECOVERY)
printf("USB recovery mode\n");
return 0;
}
int checkboard(void)
{
puts("Model: Toradex Colibri T30 1GB\n");
return 0;
}
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
return ft_common_board_setup(blob, bd);
}
#endif
/*
* Routine: pinmux_init
* Description: Do individual peripheral pinmux configs
*/
void pinmux_init(void)
{
pinmux_config_pingrp_table(tegra3_pinmux_common,
ARRAY_SIZE(tegra3_pinmux_common));
pinmux_config_pingrp_table(unused_pins_lowpower,
ARRAY_SIZE(unused_pins_lowpower));
/* Initialize any non-default pad configs (APB_MISC_GP regs) */
pinmux_config_drvgrp_table(colibri_t30_padctrl,
ARRAY_SIZE(colibri_t30_padctrl));
}
/*
* Enable AX88772B USB to LAN controller
*/
void pin_mux_usb(void)
{
/* Reset ASIX using LAN_RESET */
gpio_request(TEGRA_GPIO(DD, 0), "LAN_RESET");
gpio_direction_output(TEGRA_GPIO(DD, 0), 0);
udelay(5);
gpio_set_value(TEGRA_GPIO(DD, 0), 1);
}
/*
* Backlight off before OS handover
*/
void board_preboot_os(void)
{
gpio_request(TEGRA_GPIO(V, 2), "BL_ON");
gpio_direction_output(TEGRA_GPIO(V, 2), 0);
}