Re: [PATCH 2/7] stm32mp: cmd_stm32key: use sub command

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

Hi Patrick

On 6/28/21 2:55 PM, Patrick Delaunay wrote:
> Simplify parsing the command argument by using
> the macro U_BOOT_CMD_WITH_SUBCMDS.
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
> ---
> 
>  arch/arm/mach-stm32mp/cmd_stm32key.c | 55 ++++++++++++++++++----------
>  1 file changed, 36 insertions(+), 19 deletions(-)
> 
> diff --git a/arch/arm/mach-stm32mp/cmd_stm32key.c b/arch/arm/mach-stm32mp/cmd_stm32key.c
> index 42fdc11238..d2045a5983 100644
> --- a/arch/arm/mach-stm32mp/cmd_stm32key.c
> +++ b/arch/arm/mach-stm32mp/cmd_stm32key.c
> @@ -67,36 +67,53 @@ static int confirm_prog(void)
>  	return 0;
>  }
>  
> -static int do_stm32key(struct cmd_tbl *cmdtp, int flag, int argc,
> -		       char *const argv[])
> +static int do_stm32key_read(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
>  {
>  	u32 addr;
> -	const char *op = argc >= 2 ? argv[1] : NULL;
> -	int confirmed = argc > 3 && !strcmp(argv[2], "-y");
>  
> -	argc -= 2 + confirmed;
> -	argv += 2 + confirmed;
> -
> -	if (argc < 1)
> +	if (argc == 1)
>  		return CMD_RET_USAGE;
>  
> -	addr = simple_strtoul(argv[0], NULL, 16);
> +	addr = simple_strtoul(argv[1], NULL, 16);
>  	if (!addr)
>  		return CMD_RET_USAGE;
>  
> -	if (!strcmp(op, "read"))
> -		read_hash_value(addr);
> +	read_hash_value(addr);
> +
> +	return CMD_RET_SUCCESS;
> +}
> +
> +static int do_stm32key_fuse(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> +{
> +	u32 addr;
> +	bool yes = false;
>  
> -	if (!strcmp(op, "fuse")) {
> -		if (!confirmed && !confirm_prog())
> -			return CMD_RET_FAILURE;
> -		fuse_hash_value(addr, !confirmed);
> +	if (argc < 2)
> +		return CMD_RET_USAGE;
> +
> +	if (argc == 3) {
> +		if (strcmp(argv[1], "-y"))
> +			return CMD_RET_USAGE;
> +		yes = true;
>  	}
>  
> +	addr = simple_strtoul(argv[argc - 1], NULL, 16);
> +	if (!addr)
> +		return CMD_RET_USAGE;
> +
> +	if (!yes && !confirm_prog())
> +		return CMD_RET_FAILURE;
> +
> +	fuse_hash_value(addr, !yes);
> +	printf("Hash key updated !\n");
> +
>  	return CMD_RET_SUCCESS;
>  }
>  
> -U_BOOT_CMD(stm32key, 4, 1, do_stm32key,
> -	   "Fuse ST Hash key",
> -	   "read <addr>: Read the hash store at addr in memory\n"
> -	   "stm32key fuse [-y] <addr> : Fuse hash store at addr in otp\n");
> +static char stm32key_help_text[] =
> +	"read <addr>: Read the hash stored at addr in memory\n"
> +	"stm32key fuse [-y] <addr> : Fuse hash stored at addr in OTP\n";
> +
> +U_BOOT_CMD_WITH_SUBCMDS(stm32key, "Fuse ST Hash key", stm32key_help_text,
> +	U_BOOT_SUBCMD_MKENT(read, 2, 0, do_stm32key_read),
> +	U_BOOT_SUBCMD_MKENT(fuse, 3, 0, do_stm32key_fuse));
> 
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

Thanks
Patrice