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net: Add support for reading mac addresses from nvmem cells

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This adds support for reading mac addresses from the "mac-address" nvmem
cell. If there is no (local-)mac-address property, then we will try
reading from an nvmem cell.

For some existing examples of this property, refer to imx8mn.dtsi and
imx8mp.dtsi. Unfortunately, fuse drivers have not yet been converted
to DM.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sean Anderson 2022-05-05 13:11:41 -04:00 • committed by Tom Rini
parent 185d3db7be
commit 97d0f9bfdd
1 changed files with 9 additions and 4 deletions
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13
net/eth-uclass.c
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@ -14,6 +14,7 @@
#include <env.h>
#include <log.h>
#include <net.h>
#include <nvmem.h>
#include <asm/global_data.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
@ -507,17 +508,21 @@ static bool eth_dev_get_mac_address(struct udevice *dev, u8 mac[ARP_HLEN])
{
#if CONFIG_IS_ENABLED(OF_CONTROL)
const uint8_t *p;
struct nvmem_cell mac_cell;
p = dev_read_u8_array_ptr(dev, "mac-address", ARP_HLEN);
if (!p)
p = dev_read_u8_array_ptr(dev, "local-mac-address", ARP_HLEN);
if (!p)
if (p) {
memcpy(mac, p, ARP_HLEN);
return true;
}
if (nvmem_cell_get_by_name(dev, "mac-address", &mac_cell))
return false;
memcpy(mac, p, ARP_HLEN);
return true;
return !nvmem_cell_read(&mac_cell, mac, ARP_HLEN);
#else
return false;
#endif