u-boot/board/samsung/smdk5420/smdk5420.c
Simon Glass 7f1961018c dm: exynos: Make sure that GPIOs are requested
With driver model GPIOs must be requested before use. Make sure this is
done correctly.

(Note that the soft SPI part of universal is omitted, since this driver
is about to be replaced with a driver-model-aware version)

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-10-22 10:36:33 -06:00

107 lines
2.1 KiB
C

/*
* Copyright (C) 2013 Samsung Electronics
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <asm/io.h>
#include <i2c.h>
#include <lcd.h>
#include <spi.h>
#include <errno.h>
#include <asm/gpio.h>
#include <asm/arch/board.h>
#include <asm/arch/cpu.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/system.h>
#include <asm/arch/dp_info.h>
#include <power/tps65090_pmic.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_USB_EHCI_EXYNOS
static int board_usb_vbus_init(void)
{
/* Enable VBUS power switch */
gpio_direction_output(EXYNOS5420_GPIO_X26, 1);
/* VBUS turn ON time */
mdelay(3);
return 0;
}
#endif
int exynos_init(void)
{
#ifdef CONFIG_USB_EHCI_EXYNOS
board_usb_vbus_init();
#endif
return 0;
}
#ifdef CONFIG_LCD
static int has_edp_bridge(void)
{
int node;
node = fdtdec_next_compatible(gd->fdt_blob, 0, COMPAT_PARADE_PS8625);
/* No node for bridge in device tree. */
if (node <= 0)
return 0;
/* Default is with bridge ic */
return 1;
}
void exynos_lcd_power_on(void)
{
int ret;
#ifdef CONFIG_POWER_TPS65090
ret = tps65090_init();
if (ret < 0) {
printf("%s: tps65090_init() failed\n", __func__);
return;
}
tps65090_fet_enable(6);
#endif
mdelay(5);
/* TODO(ajaykumar.rs@samsung.com): Use device tree */
gpio_request(EXYNOS5420_GPIO_X35, "edp_slp#");
gpio_direction_output(EXYNOS5420_GPIO_X35, 1); /* EDP_SLP# */
mdelay(10);
gpio_request(EXYNOS5420_GPIO_Y77, "edp_rst#");
gpio_direction_output(EXYNOS5420_GPIO_Y77, 1); /* EDP_RST# */
gpio_request(EXYNOS5420_GPIO_X26, "edp_hpd");
gpio_direction_input(EXYNOS5420_GPIO_X26); /* EDP_HPD */
gpio_set_pull(EXYNOS5420_GPIO_X26, S5P_GPIO_PULL_NONE);
if (has_edp_bridge())
if (parade_init(gd->fdt_blob))
printf("%s: ps8625_init() failed\n", __func__);
}
void exynos_backlight_on(unsigned int onoff)
{
/* For PWM */
gpio_request(EXYNOS5420_GPIO_B20, "backlight_on");
gpio_cfg_pin(EXYNOS5420_GPIO_B20, S5P_GPIO_FUNC(0x1));
gpio_set_value(EXYNOS5420_GPIO_B20, 1);
#ifdef CONFIG_POWER_TPS65090
tps65090_fet_enable(1);
#endif
}
#endif
int board_get_revision(void)
{
return 0;
}