[Uboot-stm32] [PATCH 05/10] board: stm32mp1: stboard: lock the OTP after programming

[Patrice CHOTARD <patrice.chotard@st.com>]

On 2/12/20 7:37 PM, Patrick Delaunay wrote:
> Lock the OTP used for board identification for the ST boards after
> programming.
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
> ---
>
>  board/st/common/cmd_stboard.c | 21 ++++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/board/st/common/cmd_stboard.c b/board/st/common/cmd_stboard.c
> index c7ca773b1c..1573e35410 100644
> --- 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;

Acked-by: Patrice Chotard <patrice.chotard@st.com>

Thanks

Patrice