From ec716e33d6ce46c9b60db4cf35af81d8812b414e Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Wed, 12 Mar 2014 10:45:41 +0100 Subject: [PATCH] arm: am335x: DXR2: Move unconditional LAN9303 reset into command 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 Cc: Roger Meier Cc: Lukas Stockmann Cc: Tom Rini --- board/siemens/dxr2/board.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/board/siemens/dxr2/board.c b/board/siemens/dxr2/board.c index 217237900e..38ac93d795 100644 --- a/board/siemens/dxr2/board.c +++ b/board/siemens/dxr2/board.c @@ -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)) */ -- 2.39.5