board: stm32mp1: stboard: lock the OTP after programming

Lock the OTP used for board identification for the ST boards after
programming.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>

diff --git a/board/st/common/cmd_stboard.c b/board/st/common/cmd_stboard.c
index c7ca773b1c8b92541f8aa6b15e894ca8f26c3204..1573e35410f4bdb27326f4ea00aeb1955716085d 100644 (file)
--- a/board/st/common/cmd_stboard.c
+++ b/board/st/common/cmd_stboard.c
@@ -42,7 +42,7 @@ static int do_stboard(cmd_tbl_t *cmdtp, int flag, int argc,
                      char * const argv[])
 {
        int ret;
-       u32 otp;
+       u32 otp, lock;
        u8 revision;
        unsigned long board, variant, bom;
        struct udevice *dev;
@@ -66,11 +66,20 @@ static int do_stboard(cmd_tbl_t *cmdtp, int flag, int argc,
                return CMD_RET_FAILURE;
        }
 
+       ret = misc_read(dev, STM32_BSEC_LOCK(BSEC_OTP_BOARD),
+                       &lock, sizeof(lock));
+       if (ret < 0) {
+               puts("LOCK read error");
+               return CMD_RET_FAILURE;
+       }
+
        if (argc == 0) {
                if (!otp)
                        puts("Board : OTP board FREE\n");
                else
                        display_stboard(otp);
+               printf("      OTP %d %s locked !\n", BSEC_OTP_BOARD,
+                      lock == 1 ? "" : "NOT");
                return CMD_RET_SUCCESS;
        }
 
@@ -129,6 +138,16 @@ static int do_stboard(cmd_tbl_t *cmdtp, int flag, int argc,
                puts("BOARD programming error\n");
                return CMD_RET_FAILURE;
        }
+
+       /* write persistent lock */
+       otp = 1;
+       ret = misc_write(dev, STM32_BSEC_LOCK(BSEC_OTP_BOARD),
+                        &otp, sizeof(otp));
+       if (ret < 0) {
+               puts("BOARD lock error\n");
+               return CMD_RET_FAILURE;
+       }
+
        puts("BOARD programming done\n");
 
        return CMD_RET_SUCCESS;