arm: mvebu: turris_omnia: disable MCU watchdog in SPL when booting over UART

When booting over UART, sending U-Boot proper may take too much time and
MCU watchdog will reset the board before U-Boot proper is loaded.

Better disable MCU watchdog in SPL when booting over UART.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c
index a84a409..b0391c9 100644 (file)
--- a/board/CZ.NIC/turris_omnia/turris_omnia.c
+++ b/board/CZ.NIC/turris_omnia/turris_omnia.c
@@ -419,12 +419,27 @@ int board_early_init_f(void)
        return 0;
 }
 
+void spl_board_init(void)
+{
+       /*
+        * If booting from UART, disable MCU watchdog in SPL, since uploading
+        * U-Boot proper can take too much time and trigger it.
+        */
+       if (get_boot_device() == BOOT_DEVICE_UART)
+               disable_mcu_watchdog();
+}
+
 int board_init(void)
 {
        /* address of boot parameters */
        gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
 
-       disable_mcu_watchdog();
+       /*
+        * If not booting from UART, MCU watchdog was not disabled in SPL,
+        * disable it now.
+        */
+       if (get_boot_device() != BOOT_DEVICE_UART)
+               disable_mcu_watchdog();
 
        return 0;
 }

diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index 2acc4ad..b2bbbd1 100644 (file)
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -33,6 +33,7 @@ CONFIG_SYS_CONSOLE_INFO_QUIET=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_MISC_INIT_R=y
+CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_I2C=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_SYS_ALT_MEMTEST=y