board/samsung/smdk5420/smdk5420.c

   1 /*
   2  * Copyright (C) 2013 Samsung Electronics
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <fdtdec.h>
   9 #include <asm/io.h>
  10 #include <i2c.h>
  11 #include <lcd.h>
  12 #include <spi.h>
  13 #include <errno.h>
  14 #include <asm/gpio.h>
  15 #include <asm/arch/board.h>
  16 #include <asm/arch/cpu.h>
  17 #include <asm/arch/pinmux.h>
  18 #include <asm/arch/system.h>
  19 #include <asm/arch/dp_info.h>
  20 #include <power/tps65090_pmic.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 #ifdef CONFIG_USB_EHCI_EXYNOS
  25 static int board_usb_vbus_init(void)
  26 {
  27         /* Enable VBUS power switch */
  28         gpio_direction_output(EXYNOS5420_GPIO_X26, 1);
  29
  30         /* VBUS turn ON time */
  31         mdelay(3);
  32
  33         return 0;
  34 }
  35 #endif
  36
  37 int exynos_init(void)
  38 {
  39 #ifdef CONFIG_USB_EHCI_EXYNOS
  40         board_usb_vbus_init();
  41 #endif
  42         return 0;
  43 }
  44
  45 #ifdef CONFIG_LCD
  46 static int has_edp_bridge(void)
  47 {
  48         int node;
  49
  50         node = fdtdec_next_compatible(gd->fdt_blob, 0, COMPAT_PARADE_PS8625);
  51
  52         /* No node for bridge in device tree. */
  53         if (node <= 0)
  54                 return 0;
  55
  56         /* Default is with bridge ic */
  57         return 1;
  58 }
  59
  60 void exynos_lcd_power_on(void)
  61 {
  62         int ret;
  63
  64 #ifdef CONFIG_POWER_TPS65090
  65         ret = tps65090_init();
  66         if (ret < 0) {
  67                 printf("%s: tps65090_init() failed\n", __func__);
  68                 return;
  69         }
  70
  71         tps65090_fet_enable(6);
  72 #endif
  73
  74         mdelay(5);
  75
  76         /* TODO(ajaykumar.rs@samsung.com): Use device tree */
  77         gpio_direction_output(EXYNOS5420_GPIO_X35, 1);  /* EDP_SLP# */
  78         mdelay(10);
  79         gpio_direction_output(EXYNOS5420_GPIO_Y77, 1);  /* EDP_RST# */
  80         gpio_direction_input(EXYNOS5420_GPIO_X26);      /* EDP_HPD */
  81         gpio_set_pull(EXYNOS5420_GPIO_X26, S5P_GPIO_PULL_NONE);
  82
  83         if (has_edp_bridge())
  84                 if (parade_init(gd->fdt_blob))
  85                         printf("%s: ps8625_init() failed\n", __func__);
  86 }
  87
  88 void exynos_backlight_on(unsigned int onoff)
  89 {
  90         /* For PWM */
  91         gpio_cfg_pin(EXYNOS5420_GPIO_B20, S5P_GPIO_FUNC(0x1));
  92         gpio_set_value(EXYNOS5420_GPIO_B20, 1);
  93
  94 #ifdef CONFIG_POWER_TPS65090
  95         tps65090_fet_enable(1);
  96 #endif
  97 }
  98 #endif
  99
 100 int board_get_revision(void)
 101 {
 102         return 0;
 103 }