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omap3evm: Update ethernet reset sequence for Rev.G board 

The GPIO pin used for resetting the external LAN chip has
changed for Rev.G board.

The patch uses generic gpio API instead of direct access
to corresponding registers.

Signed-off-by: Sriramakrishnan <srk@ti.com>
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Sriramakrishnan 2011-07-18 09:21:55 -04:00 committed by U-Boot
parent 6921b314a8
commit c06825873d
1 changed files with 24 additions and 7 deletions
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31
board/ti/evm/evm.c
View File

@ -33,10 +33,14 @@
#include <asm/arch/mem.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/gpio.h>
#include <i2c.h>
#include <asm/mach-types.h>
#include "evm.h"
#define OMAP3EVM_GPIO_ETH_RST_GEN1 64
#define OMAP3EVM_GPIO_ETH_RST_GEN2 7
DECLARE_GLOBAL_DATA_PTR;
static u32 omap3_evm_version;
@ -181,17 +185,30 @@ static void setup_net_chip(void)
*/
static void reset_net_chip(void)
{
struct gpio *gpio3_base = (struct gpio *)OMAP34XX_GPIO3_BASE;
int ret;
int rst_gpio;
/* Make GPIO 64 as output pin */
writel(readl(&gpio3_base->oe) & ~(GPIO0), &gpio3_base->oe);
if (get_omap3_evm_rev() == OMAP3EVM_BOARD_GEN_1) {
rst_gpio = OMAP3EVM_GPIO_ETH_RST_GEN1;
} else {
rst_gpio = OMAP3EVM_GPIO_ETH_RST_GEN2;
}
/* Now send a pulse on the GPIO pin */
writel(GPIO0, &gpio3_base->setdataout);
ret = omap_request_gpio(rst_gpio);
if (ret < 0) {
printf("Unable to get GPIO %d\n", rst_gpio);
return ;
}
/* Configure as output */
omap_set_gpio_direction(rst_gpio, 0);
/* Send a pulse on the GPIO pin */
omap_set_gpio_dataout(rst_gpio, 1);
udelay(1);
writel(GPIO0, &gpio3_base->cleardataout);
omap_set_gpio_dataout(rst_gpio, 0);
udelay(1);
writel(GPIO0, &gpio3_base->setdataout);
omap_set_gpio_dataout(rst_gpio, 1);
}
int board_eth_init(bd_t *bis)