sysreset: move stm32mp sysreset poweroff implementation to sysreset uclass

This is a generic implementation. Add CONFIG_SYSRESET_CMD_POWEROFF
to signal when we need it. Enable it from the STPMIC1 config and in
sandbox.

The config flag is transitionary, that is it can be removed after all
poweroff implementations use sysreset, and just have CMD_POWEROFF depend
on sysreset.

Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Tested-by: Patrick Delaunay <patrick.delaunay@st.com>

arch/Kconfig

@@ -93,6 +93,7 @@ config SANDBOX
 	select PCI_ENDPOINT
 	select SPI
 	select SUPPORT_OF_CONTROL
+	select SYSRESET_CMD_POWEROFF if CMD_POWEROFF
 	imply BITREVERSE
 	select BLOBLIST
 	imply CMD_DM

arch/arm/mach-stm32mp/Makefile

@@ -12,9 +12,6 @@ obj-y += spl.o
 else
 obj-y += bsec.o
 obj-$(CONFIG_CMD_STM32KEY) += cmd_stm32key.o
-ifndef CONFIG_STM32MP1_TRUSTED
-obj-$(CONFIG_SYSRESET) += cmd_poweroff.o
-endif
 endif
 obj-$(CONFIG_ARMV7_PSCI) += psci.o
 obj-$(CONFIG_$(SPL_)DM_REGULATOR) += pwr_regulator.o

arch/arm/mach-stm32mp/cmd_poweroff.c

@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
-/*
- * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
- */
-
-#include <common.h>
-#include <command.h>
-#include <sysreset.h>
-
-int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
-	int ret;
-
-	puts("poweroff ...\n");
-	mdelay(100);
-
-	ret = sysreset_walk(SYSRESET_POWER_OFF);
-
-	if (ret == -EINPROGRESS)
-		mdelay(1000);
-
-	/*NOTREACHED when power off*/
-	return CMD_RET_FAILURE;
-}