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arm: am335x: DXR2: Reset SMSC LAN9303 switch via GPIO upon bootup

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Since the switch may be re-configured for VLAN usage in Linux (or any
other OS), lets reset the switch to its default register values upon
power-up. Otherwise network might not be available in U-Boot.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Roger Meier <r.meier@siemens.com>
Cc: Lukas Stockmann <lukas.stockmann@siemens.com>
Cc: Tom Rini <trini@ti.com>
This commit is contained in:
Stefan Roese 2014-02-25 11:07:22 +01:00 committed by Tom Rini
parent b56b9a0884
commit cc07294bc7
3 changed files with 10 additions and 0 deletions
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7
board/siemens/dxr2/board.c
View File

@ -232,6 +232,13 @@ int board_eth_init(bd_t *bis)
factoryset_setenv();
/* Reset SMSC LAN9303 switch for default configuration */
gpio_request(GPIO_LAN9303_NRST, "nRST");
gpio_direction_output(GPIO_LAN9303_NRST, 0);
/* assert active low reset for 200us */
udelay(200);
gpio_set_value(GPIO_LAN9303_NRST, 1);
/* Set rgmii mode and enable rmii clock to be sourced from chip */
writel((RMII_MODE_ENABLE | RMII_CHIPCKL_ENABLE), &cdev->miisel);

2
board/siemens/dxr2/mux.c
View File

@ -221,6 +221,8 @@ static struct module_pin_mux gpios_pin_mux[] = {
{OFFSET(ain0), MODE(7) | RXACTIVE | PULLUDDIS},
{OFFSET(vrefp), MODE(7) | RXACTIVE | PULLUDDIS},
{OFFSET(vrefn), MODE(7) | RXACTIVE | PULLUDDIS},
/* nRST for SMSC LAN9303 switch - GPIO2_24 */
{OFFSET(lcd_pclk), MODE(7) }, /* LAN9303 nRST */
{-1},
};

1
include/configs/dxr2.h
View File

@ -26,6 +26,7 @@
#define BOARD_DFU_BUTTON_GPIO 27
#define BOARD_DFU_BUTTON_LED 64
#define GPIO_LAN9303_NRST 88 /* GPIO2_24 = gpio88 */
#undef CONFIG_DOS_PARTITION
#undef CONFIG_CMD_FAT