[PATCH V2 2/3] nvmem: brcm_nvram: add .read_post_process() for MACs

[Srinivas Kandagatla]

On 21/04/2023 09:43, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal at milecki.pl>
> 
> 1. Parse ASCII MAC format into byte based
> 2. Calculate relative addresses based on index argument
> 
> Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
> ---

Applied thanks,

--srini
>   drivers/nvmem/Kconfig      |  1 +
>   drivers/nvmem/brcm_nvram.c | 28 ++++++++++++++++++++++++++++
>   2 files changed, 29 insertions(+)
> 
> diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
> index b291b27048c7..688b70ba4826 100644
> --- a/drivers/nvmem/Kconfig
> +++ b/drivers/nvmem/Kconfig
> @@ -55,6 +55,7 @@ config NVMEM_BRCM_NVRAM
>   	tristate "Broadcom's NVRAM support"
>   	depends on ARCH_BCM_5301X || COMPILE_TEST
>   	depends on HAS_IOMEM
> +	select GENERIC_NET_UTILS
>   	help
>   	  This driver provides support for Broadcom's NVRAM that can be accessed
>   	  using I/O mapping.
> diff --git a/drivers/nvmem/brcm_nvram.c b/drivers/nvmem/brcm_nvram.c
> index 39aa27942f28..4567c597c87f 100644
> --- a/drivers/nvmem/brcm_nvram.c
> +++ b/drivers/nvmem/brcm_nvram.c
> @@ -4,6 +4,8 @@
>    */
>   
>   #include <linux/bcm47xx_nvram.h>
> +#include <linux/etherdevice.h>
> +#include <linux/if_ether.h>
>   #include <linux/io.h>
>   #include <linux/mod_devicetable.h>
>   #include <linux/module.h>
> @@ -42,6 +44,25 @@ static int brcm_nvram_read(void *context, unsigned int offset, void *val,
>   	return 0;
>   }
>   
> +static int brcm_nvram_read_post_process_macaddr(void *context, const char *id, int index,
> +						unsigned int offset, void *buf, size_t bytes)
> +{
> +	u8 mac[ETH_ALEN];
> +
> +	if (bytes != 3 * ETH_ALEN - 1)
> +		return -EINVAL;
> +
> +	if (!mac_pton(buf, mac))
> +		return -EINVAL;
> +
> +	if (index)
> +		eth_addr_add(mac, index);
> +
> +	ether_addr_copy(buf, mac);
> +
> +	return 0;
> +}
> +
>   static int brcm_nvram_add_cells(struct brcm_nvram *priv, uint8_t *data,
>   				size_t len)
>   {
> @@ -75,6 +96,13 @@ static int brcm_nvram_add_cells(struct brcm_nvram *priv, uint8_t *data,
>   		priv->cells[idx].offset = value - (char *)data;
>   		priv->cells[idx].bytes = strlen(value);
>   		priv->cells[idx].np = of_get_child_by_name(dev->of_node, priv->cells[idx].name);
> +		if (!strcmp(var, "et0macaddr") ||
> +		    !strcmp(var, "et1macaddr") ||
> +		    !strcmp(var, "et2macaddr")) {
> +			priv->cells[idx].raw_len = strlen(value);
> +			priv->cells[idx].bytes = ETH_ALEN;
> +			priv->cells[idx].read_post_process = brcm_nvram_read_post_process_macaddr;
> +		}
>   	}
>   
>   	return 0;