Commit caeeeda3 authored by David S. Miller's avatar David S. Miller

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: default avatarDavid S. Miller <davem@davemloft.net>
parents 64e828df aa076e3d
......@@ -10,6 +10,8 @@ Documentation/devicetree/bindings/phy/phy-bindings.txt.
the boot program; should be used in cases where the MAC address assigned to
the device by the boot program is different from the "local-mac-address"
property;
- nvmem-cells: phandle, reference to an nvmem node for the MAC address;
- nvmem-cell-names: string, should be "mac-address" if nvmem is to be used;
- max-speed: number, specifies maximum speed in Mbit/s supported by the device;
- max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
the maximum frame size (there's contradiction in the Devicetree
......
......@@ -3952,10 +3952,16 @@ static int macb_probe(struct platform_device *pdev)
dev->max_mtu = ETH_DATA_LEN;
mac = of_get_mac_address(np);
if (mac)
if (mac) {
ether_addr_copy(bp->dev->dev_addr, mac);
else
macb_get_hwaddr(bp);
} else {
err = of_get_nvmem_mac_address(np, bp->dev->dev_addr);
if (err) {
if (err == -EPROBE_DEFER)
goto err_out_free_netdev;
macb_get_hwaddr(bp);
}
}
err = of_get_phy_mode(np);
if (err < 0) {
......
......@@ -7,6 +7,7 @@
*/
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/nvmem-consumer.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/export.h>
......@@ -80,3 +81,42 @@ const void *of_get_mac_address(struct device_node *np)
return of_get_mac_addr(np, "address");
}
EXPORT_SYMBOL(of_get_mac_address);
/**
* Obtain the MAC address from an nvmem provider named 'mac-address' through
* device tree.
* On success, copies the new address into memory pointed to by addr and
* returns 0. Returns a negative error code otherwise.
* @np: Device tree node containing the nvmem-cells phandle
* @addr: Pointer to receive the MAC address using ether_addr_copy()
*/
int of_get_nvmem_mac_address(struct device_node *np, void *addr)
{
struct nvmem_cell *cell;
const void *mac;
size_t len;
int ret;
cell = of_nvmem_cell_get(np, "mac-address");
if (IS_ERR(cell))
return PTR_ERR(cell);
mac = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR(mac))
return PTR_ERR(mac);
if (len < ETH_ALEN || !is_valid_ether_addr(mac)) {
ret = -EINVAL;
} else {
ether_addr_copy(addr, mac);
ret = 0;
}
kfree(mac);
return ret;
}
EXPORT_SYMBOL(of_get_nvmem_mac_address);
......@@ -13,6 +13,7 @@
struct net_device;
extern int of_get_phy_mode(struct device_node *np);
extern const void *of_get_mac_address(struct device_node *np);
extern int of_get_nvmem_mac_address(struct device_node *np, void *addr);
extern struct net_device *of_find_net_device_by_node(struct device_node *np);
#else
static inline int of_get_phy_mode(struct device_node *np)
......@@ -25,6 +26,11 @@ static inline const void *of_get_mac_address(struct device_node *np)
return NULL;
}
static inline int of_get_nvmem_mac_address(struct device_node *np, void *addr)
{
return -ENODEV;
}
static inline struct net_device *of_find_net_device_by_node(struct device_node *np)
{
return NULL;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment