Merge branch 'Implement-of_get_nvmem_mac_address-helper'
Mike Looijmans says: ==================== of_net: Implement of_get_nvmem_mac_address helper Posted this as a small set now, with an (optional) second patch that shows how the changes work and what I've used to test the code on a Topic Miami board. I've taken the liberty to add appropriate "Acked" and "Review" tags. v4: Replaced "6" with ETH_ALEN v3: Add patch that implements mac in nvmem for the Cadence MACB controller Remove the integrated of_get_mac_address call v2: Use of_nvmem_cell_get to avoid needing the assiciated device Use void* instead of char* Add devicetree binding doc ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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caeeeda344
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@ -10,6 +10,8 @@ Documentation/devicetree/bindings/phy/phy-bindings.txt.
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the boot program; should be used in cases where the MAC address assigned to
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the device by the boot program is different from the "local-mac-address"
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property;
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- nvmem-cells: phandle, reference to an nvmem node for the MAC address;
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- nvmem-cell-names: string, should be "mac-address" if nvmem is to be used;
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- max-speed: number, specifies maximum speed in Mbit/s supported by the device;
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- max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
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the maximum frame size (there's contradiction in the Devicetree
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@ -3952,10 +3952,16 @@ static int macb_probe(struct platform_device *pdev)
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dev->max_mtu = ETH_DATA_LEN;
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mac = of_get_mac_address(np);
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if (mac)
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if (mac) {
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ether_addr_copy(bp->dev->dev_addr, mac);
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else
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macb_get_hwaddr(bp);
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} else {
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err = of_get_nvmem_mac_address(np, bp->dev->dev_addr);
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if (err) {
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if (err == -EPROBE_DEFER)
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goto err_out_free_netdev;
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macb_get_hwaddr(bp);
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}
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}
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err = of_get_phy_mode(np);
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if (err < 0) {
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@ -7,6 +7,7 @@
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*/
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#include <linux/etherdevice.h>
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#include <linux/kernel.h>
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#include <linux/nvmem-consumer.h>
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#include <linux/of_net.h>
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#include <linux/phy.h>
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#include <linux/export.h>
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@ -80,3 +81,42 @@ const void *of_get_mac_address(struct device_node *np)
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return of_get_mac_addr(np, "address");
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}
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EXPORT_SYMBOL(of_get_mac_address);
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/**
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* Obtain the MAC address from an nvmem provider named 'mac-address' through
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* device tree.
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* On success, copies the new address into memory pointed to by addr and
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* returns 0. Returns a negative error code otherwise.
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* @np: Device tree node containing the nvmem-cells phandle
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* @addr: Pointer to receive the MAC address using ether_addr_copy()
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*/
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int of_get_nvmem_mac_address(struct device_node *np, void *addr)
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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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int ret;
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cell = of_nvmem_cell_get(np, "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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ret = -EINVAL;
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} else {
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ether_addr_copy(addr, mac);
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ret = 0;
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}
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kfree(mac);
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return ret;
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}
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EXPORT_SYMBOL(of_get_nvmem_mac_address);
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@ -13,6 +13,7 @@
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struct net_device;
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extern int of_get_phy_mode(struct device_node *np);
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extern const void *of_get_mac_address(struct device_node *np);
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extern int of_get_nvmem_mac_address(struct device_node *np, void *addr);
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extern struct net_device *of_find_net_device_by_node(struct device_node *np);
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#else
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static inline int of_get_phy_mode(struct device_node *np)
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@ -25,6 +26,11 @@ static inline const void *of_get_mac_address(struct device_node *np)
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return NULL;
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}
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static inline int of_get_nvmem_mac_address(struct device_node *np, void *addr)
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{
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return -ENODEV;
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}
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static inline struct net_device *of_find_net_device_by_node(struct device_node *np)
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{
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return NULL;
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