[PATCH 3/3] soc: kvx: Add board_sn global var from OTP

[Sascha Hauer]

On Tue, Jul 11, 2023 at 11:11:23AM +0200, Jules Maselbas wrote:
> Add the magic variable "kvx.board_sn" that will reflect the board serial
> number stored in OTP.
> 
> Signed-off-by: Jules Maselbas <jmaselbas at kalray.eu>
> ---
>  drivers/soc/kvx/kvx_socinfo.c | 33 ++++++++++++++++++++++++++++++++-
>  1 file changed, 32 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/kvx/kvx_socinfo.c b/drivers/soc/kvx/kvx_socinfo.c
> index 496e817755..87c20c327b 100644
> --- a/drivers/soc/kvx/kvx_socinfo.c
> +++ b/drivers/soc/kvx/kvx_socinfo.c
> @@ -33,9 +33,11 @@
>  
>  static char *kvx_mppa_id;
>  static char *kvx_arch_rev;
> +static char *kvx_board_sn;
>  
>  BAREBOX_MAGICVAR(kvx.arch_rev, "KVX architecture revision");
>  BAREBOX_MAGICVAR(kvx.mppa_id, "KVX MPPA chip id");
> +BAREBOX_MAGICVAR(kvx.board_sn, "KVX board sn");
>  
>  static void kvx_soc_info_read_revision(void)
>  {
> @@ -123,11 +125,40 @@ static int kvx_read_mppa_id(struct device_node *socinfo)
>  	return 0;
>  }
>  
> +static int kvx_read_board_sn(struct device_node *socinfo)
> +{
> +	struct nvmem_cell *cell;
> +	size_t len;
> +	char *sn;
> +
> +	cell = of_nvmem_cell_get(socinfo, "board_sn");
> +	if (IS_ERR(cell)) {
> +		pr_debug("Fail to get board_sn cell\n");
> +		return PTR_ERR(cell);
> +	}
> +
> +	sn = (char *)nvmem_cell_read(cell, &len);
> +	nvmem_cell_put(cell);
> +	if (IS_ERR(sn)) {
> +		pr_debug("Fail to read board_sn\n");
> +		return PTR_ERR(sn);
> +	}
> +
> +	kvx_board_sn = xzalloc(len + 1);
> +	memcpy(kvx_board_sn, sn, len);
> +	globalvar_add_simple_string("kvx.board_sn", &kvx_board_sn);
> +	free(sn);
> +
> +	return 0;
> +}
> +
>  static int kvx_socinfo_probe(struct device *dev)
>  {
>  	kvx_soc_info_read_revision();
>  
> -	return kvx_read_serial(dev->of_node);
> +	kvx_read_board_sn(dev->device_node);
> +
> +	return kvx_read_mppa_id(dev->device_node);
>  }

Ah, ok. Here is the missing hunk from patch 1. I just fixed this up
while applying.

Sascha

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