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 <sr@denx.de>
Cc: Roger Meier <r.meier@siemens.com>
Cc: Lukas Stockmann <lukas.stockmann@siemens.com>
Cc: Tom Rini <trini@ti.com>

diff --git a/board/siemens/dxr2/board.c b/board/siemens/dxr2/board.c
index 217237900e36bd47baa46a400fed8862f168176f..38ac93d79573eeb4fde953a71b3cbfe59499d0a3 100644 (file)
--- 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)) */