Commit 73bcd133 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Greg Kroah-Hartman
Browse files

nvmem: brcm_nvram: add .read_post_process() for MACs 



1. Parse ASCII MAC format into byte based
2. Calculate relative addresses based on index argument

Signed-off-by: default avatarRafał Miłecki <rafal@milecki.pl>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Message-ID: <20230611140330.154222-5-srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1d53afe3

drivers/nvmem/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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.

drivers/nvmem/brcm_nvram.c

+28 −0
Original line number Diff line number Diff line
@@ -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;