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authorBastian Ruppert <Bastian.Ruppert@Sewerin.de>2011-10-04 23:43:33 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-11-03 22:56:26 +0100
commite5ee9125ecff23f337f26834c07a1f0252378818 (patch)
tree7fc29541ac6195c5820a73feb5c6a1bec0be4a22 /board/davinci/ea20
parent2084f21b05fe5b6254239fc8b1ad2f3fb259c49d (diff)
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Davinci: ea20: add gpio for keeping power on in board_late_init
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>
Diffstat (limited to 'board/davinci/ea20')
-rw-r--r--board/davinci/ea20/ea20.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/board/davinci/ea20/ea20.c b/board/davinci/ea20/ea20.c
index da9086a..1a57baf 100644
--- a/board/davinci/ea20/ea20.c
+++ b/board/davinci/ea20/ea20.c
@@ -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
/*