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Davinci: ea20: add gpio for keeping power on in board_late_init

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The pin called HALTEN drives a transistor to operate the supply
voltage. After HALTEN is high, the user can release the power
switch button and the device will stay powered on.

Signed-off-by: Bastian Ruppert <Bastian.Ruppert@Sewerin.de>
CC: sbabic@denx.de
CC: dzu@denx.de
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Bastian Ruppert 2011-10-04 23:43:33 +00:00 committed by Albert ARIBAUD
parent 2084f21b05
commit e5ee9125ec
2 changed files with 26 additions and 0 deletions
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25
board/davinci/ea20/ea20.c
View File

@ -98,6 +98,10 @@ const struct pinmux_config gpio_pins[] = {
{ pinmux(13), 8, 3 } /* GPIO6[12] U0_SW1 on EA20-00101_2*/
};
const struct pinmux_config halten_pin[] = {
{ pinmux(3), 4, 2 } /* GPIO8[6] HALTEN */
};
static const struct pinmux_resource pinmuxes[] = {
#ifdef CONFIG_SPI_FLASH
PINMUX_ITEM(spi1_pins),
@ -205,6 +209,27 @@ int board_init(void)
return 0;
}
#ifdef BOARD_LATE_INIT
int board_late_init(void)
{
struct davinci_gpio *gpio8_base =
(struct davinci_gpio *)DAVINCI_GPIO_BANK8;
/* PinMux for HALTEN */
if (davinci_configure_pin_mux(halten_pin, ARRAY_SIZE(halten_pin)) != 0)
return 1;
/* Set HALTEN to high */
writel((readl(&gpio8_base->set_data) | (1 << 6)),
&gpio8_base->set_data);
writel((readl(&gpio8_base->dir) & ~(1 << 6)), &gpio8_base->dir);
return 0;
}
#endif /* BOARD_LATE_INIT */
#ifdef CONFIG_DRIVER_TI_EMAC
/*

1
include/configs/ea20.h
View File

@ -31,6 +31,7 @@
#define CONFIG_SYS_USE_NAND
#define CONFIG_DRIVER_TI_EMAC_USE_RMII
#define CONFIG_BOARD_EARLY_INIT_F
#define BOARD_LATE_INIT
/*
* SoC Configuration