ARM: imx8m: Fix reset in SPL on NXP iMX8MM EVK

Board files should not re-implement do_reset() to work around this
function not being defined in for specific configurations. Rather,
the fix is to compile in drivers which implement this properly.
This patch enables sysreset and watchdog drivers in SPL and ties
them together to implement the same as the do_reset() hack in the
board file, except correctly in the DM/DT framework.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Flavio Suligoi <f.suligoi@asem.it>
Cc: Harald Seiler <hws@denx.de>
Cc: Igor Opaniuk <igor.opaniuk@toradex.com>
Cc: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Cc: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

diff --git a/arch/arm/dts/imx8mm-evk-u-boot.dtsi b/arch/arm/dts/imx8mm-evk-u-boot.dtsi
index 3502602fbb86e9ed22343cfd444fe490988843fe..b5c12105a9d103d40c4237c9a1c60cc3dc1c8af5 100644 (file)
--- a/arch/arm/dts/imx8mm-evk-u-boot.dtsi
+++ b/arch/arm/dts/imx8mm-evk-u-boot.dtsi
@@ -3,6 +3,14 @@
  * Copyright 2019 NXP
  */
 
+/ {
+       wdt-reboot {
+               compatible = "wdt-reboot";
+               wdt = <&wdog1>;
+               u-boot,dm-spl;
+       };
+};
+
 &{/soc@0} {
        u-boot,dm-pre-reloc;
        u-boot,dm-spl;
@@ -117,3 +125,7 @@
 &fec1 {
        phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
 };
+
+&wdog1 {
+       u-boot,dm-spl;
+};

diff --git a/configs/imx8mm_evk_defconfig b/configs/imx8mm_evk_defconfig
index 1195d889ca600e0ec88a7e0583b157420a522461..9a72f46f276ff01ba51438bbd3429833a3a3b434 100644 (file)
--- a/configs/imx8mm_evk_defconfig
+++ b/configs/imx8mm_evk_defconfig
@@ -28,6 +28,7 @@ CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_SEPARATE_BSS=y
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_SPL_POWER_SUPPORT=y
+CONFIG_SPL_WATCHDOG_SUPPORT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="u-boot=> "
 # CONFIG_CMD_EXPORTENV is not set
@@ -80,5 +81,9 @@ CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_MXC_UART=y
 CONFIG_SYSRESET=y
+CONFIG_SPL_SYSRESET=y
 CONFIG_SYSRESET_PSCI=y
+CONFIG_SYSRESET_WATCHDOG=y
 CONFIG_DM_THERMAL=y
+# CONFIG_WATCHDOG is not set
+CONFIG_IMX_WATCHDOG=y