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