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net: ethernet: provide nvmem_get_mac_address()
We already have of_get_nvmem_mac_address() but some non-DT systems want to read the MAC address from NVMEM too. Implement a generalized routine that takes struct device as argument. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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2 changed files with 39 additions and 0 deletions
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@ -32,6 +32,7 @@
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struct device;
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struct device;
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int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
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int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
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unsigned char *arch_get_platform_mac_address(void);
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unsigned char *arch_get_platform_mac_address(void);
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int nvmem_get_mac_address(struct device *dev, void *addrbuf);
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u32 eth_get_headlen(void *data, unsigned int max_len);
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u32 eth_get_headlen(void *data, unsigned int max_len);
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__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev);
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__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev);
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extern const struct header_ops eth_header_ops;
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extern const struct header_ops eth_header_ops;
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@ -47,6 +47,7 @@
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#include <linux/inet.h>
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#include <linux/inet.h>
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#include <linux/ip.h>
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#include <linux/ip.h>
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#include <linux/netdevice.h>
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#include <linux/netdevice.h>
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#include <linux/nvmem-consumer.h>
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#include <linux/etherdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/skbuff.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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@ -550,3 +551,40 @@ int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr)
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return 0;
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return 0;
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}
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}
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EXPORT_SYMBOL(eth_platform_get_mac_address);
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EXPORT_SYMBOL(eth_platform_get_mac_address);
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/**
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* Obtain the MAC address from an nvmem cell named 'mac-address' associated
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* with given device.
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*
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* @dev: Device with which the mac-address cell is associated.
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* @addrbuf: Buffer to which the MAC address will be copied on success.
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*
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* Returns 0 on success or a negative error number on failure.
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*/
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int nvmem_get_mac_address(struct device *dev, void *addrbuf)
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{
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struct nvmem_cell *cell;
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const void *mac;
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size_t len;
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cell = nvmem_cell_get(dev, "mac-address");
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if (IS_ERR(cell))
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return PTR_ERR(cell);
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mac = nvmem_cell_read(cell, &len);
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nvmem_cell_put(cell);
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if (IS_ERR(mac))
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return PTR_ERR(mac);
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if (len != ETH_ALEN || !is_valid_ether_addr(mac)) {
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kfree(mac);
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return -EINVAL;
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}
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ether_addr_copy(addrbuf, mac);
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kfree(mac);
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return 0;
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}
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EXPORT_SYMBOL(nvmem_get_mac_address);
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