From a1bc4f1937a04e70f45f3ac87aee0f168b5e7bef Mon Sep 17 00:00:00 2001
From: Eduard Strehlau <eduard@lionizers.com>
Date: Wed, 26 Apr 2023 13:04:57 -0300
Subject: smegw01: Add lockdown U-Boot env support

Add lockdown U-Boot env support so that only certain U-Boot environment
variables are allowed to be modified.

Signed-off-by: Eduard Strehlau <eduard@lionizers.com>
Signed-off-by: Fabio Estevam <festevam@denx.de>
---
 board/storopack/smegw01/Kconfig   |  7 +++++++
 board/storopack/smegw01/smegw01.c | 17 +++++++++++++++++
 2 files changed, 24 insertions(+)

(limited to 'board')

diff --git a/board/storopack/smegw01/Kconfig b/board/storopack/smegw01/Kconfig
index d8f24695d0..390214c285 100644
--- a/board/storopack/smegw01/Kconfig
+++ b/board/storopack/smegw01/Kconfig
@@ -12,4 +12,11 @@ config SYS_CONFIG_NAME
 config IMX_CONFIG
 	default "board/storopack/smegw01/imximage.cfg"
 
+config SYS_BOOT_LOCKED
+	bool "Lock boot process to EMMC"
+	default y
+	help
+	  Say N here if you want to boot from eMMC and SD.
+	  Say Y to boot from eMMC.
+
 endif
diff --git a/board/storopack/smegw01/smegw01.c b/board/storopack/smegw01/smegw01.c
index 7d4de9326d..e648b196b9 100644
--- a/board/storopack/smegw01/smegw01.c
+++ b/board/storopack/smegw01/smegw01.c
@@ -14,6 +14,7 @@
 #include <asm/io.h>
 #include <common.h>
 #include <env.h>
+#include <env_internal.h>
 #include <asm/arch/crm_regs.h>
 #include <asm/setup.h>
 #include <asm/bootm.h>
@@ -103,3 +104,19 @@ uint board_mmc_get_env_part(struct mmc *mmc)
 		part = 0;
 	return part;
 }
+
+enum env_location env_get_location(enum env_operation op, int prio)
+{
+	if (op == ENVOP_SAVE || op == ENVOP_ERASE)
+		return ENVL_MMC;
+
+	switch (prio) {
+	case 0:
+		return ENVL_NOWHERE;
+
+	case 1:
+		return ENVL_MMC;
+	}
+
+	return ENVL_UNKNOWN;
+}
-- 
cgit v1.2.1