ARM: imx8m: Fix reset in SPL on NXP iMX8MP 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/imx8mp-evk-u-boot.dtsi b/arch/arm/dts/imx8mp-evk-u-boot.dtsi
index 4675ada..24a93ac 100644 (file)
--- a/arch/arm/dts/imx8mp-evk-u-boot.dtsi
+++ b/arch/arm/dts/imx8mp-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;
@@ -119,3 +127,7 @@
 &usdhc3 {
        u-boot,dm-spl;
 };
+
+&wdog1 {
+       u-boot,dm-spl;
+};

diff --git a/configs/imx8mp_evk_defconfig b/configs/imx8mp_evk_defconfig
index 3086b7b..44b2935 100644 (file)
--- a/configs/imx8mp_evk_defconfig
+++ b/configs/imx8mp_evk_defconfig
@@ -79,4 +79,8 @@ 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_WATCHDOG is not set
+CONFIG_IMX_WATCHDOG=y