LXR uboot/board/dfi/dfi-bt700/dfi-bt700.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
   4 */
   5
   6#include <common.h>
   7#include <init.h>
   8#include <log.h>
   9#include <nuvoton_nct6102d.h>
  10#include <asm/gpio.h>
  11#include <asm/ibmpc.h>
  12#include <asm/pnp_def.h>
  13#include <linux/delay.h>
  14
  15int board_early_init_f(void)
  16{
  17#ifdef CONFIG_INTERNAL_UART
  18        /* Disable the legacy UART which is enabled per default */
  19        nct6102d_uarta_disable();
  20#else
  21        /*
  22         * The FSP enables the BayTrail internal legacy UART (again).
  23         * Disable it again, so that the Nuvoton one can be used.
  24         */
  25        setup_internal_uart(0);
  26#endif
  27
  28        /* Disable the watchdog which is enabled per default */
  29        nct6102d_wdt_disable();
  30
  31        return 0;
  32}
  33
  34int board_late_init(void)
  35{
  36        struct gpio_desc desc;
  37        int ret;
  38
  39        ret = dm_gpio_lookup_name("F10", &desc);
  40        if (ret)
  41                debug("gpio ret=%d\n", ret);
  42        ret = dm_gpio_request(&desc, "xhci_hub_reset");
  43        if (ret)
  44                debug("gpio_request ret=%d\n", ret);
  45        ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
  46        if (ret)
  47                debug("gpio dir ret=%d\n", ret);
  48
  49        /* Pull xHCI hub reset to low (active low) */
  50        dm_gpio_set_value(&desc, 0);
  51
  52        /* Wait at least 5 ms, so lets choose 10 to be safe */
  53        mdelay(10);
  54
  55        /* Pull xHCI hub reset to high (active low) */
  56        dm_gpio_set_value(&desc, 1);
  57
  58        return 0;
  59}
  60