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arm: am335x: DXR2: Move unconditional LAN9303 reset into command

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The switch HW reset results in a disconnection of the switch port daisy-
chain for a few seconds. This is not desired in the normal field use
case. So lets remove this switch reset from the normal bootup sequence
and move it into a board specific command. This way it can be executed
in the development environment when really needed.

Signed-off-by: Stefan Roese <sr@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 2014-03-12 10:45:41 +01:00 committed by Tom Rini
parent ef59bb7cc8
commit ec716e33d6
1 changed files with 19 additions and 7 deletions
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26
board/siemens/dxr2/board.c
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@ -232,13 +232,6 @@ 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);
@ -249,6 +242,25 @@ int board_eth_init(bd_t *bis)
n += rv;
return n;
}
static int do_switch_reset(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
/* 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);
return 0;
};
U_BOOT_CMD(
switch_rst, CONFIG_SYS_MAXARGS, 1, do_switch_reset,
"Reset LAN9303 switch via its reset pin",
""
);
#endif /* #if defined(CONFIG_DRIVER_TI_CPSW) */
#endif /* #if (defined(CONFIG_DRIVER_TI_CPSW) && !defined(CONFIG_SPL_BUILD)) */