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: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Message-ID: <20230611140330.154222-5-srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rafał Miłecki 2023-06-11 15:03:08 +01:00 committed by Greg Kroah-Hartman
parent 1d53afe387
commit 73bcd133c9
2 changed files with 29 additions and 0 deletions

View File

@ -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.

View File

@ -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;