ARM: amlogic: fix JetHub D1 eth mac fallback generation

JetHome has allocated a special range for MAC fallback on JetHub D1/D1+
devices.

Signed-off-by: Viacheslav Bocharov <adeep@lexina.in>
Link: https://lore.kernel.org/r/20250903110726.546083-1-adeep@lexina.in
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

diff --git a/board/amlogic/jethub-j100/jethub-j100.c b/board/amlogic/jethub-j100/jethub-j100.c
index 9e87fb9f9d731353a0dde630b794df283414fd01..79732864d037c4a92df97b6ef615ee22e7005243 100644 (file)
--- a/board/amlogic/jethub-j100/jethub-j100.c
+++ b/board/amlogic/jethub-j100/jethub-j100.c
@@ -19,21 +19,17 @@ int misc_init_r(void)
 {
        u8 mac_addr[ARP_HLEN + 1];
        char serial[SM_SERIAL_SIZE];
-       u32 sid;
+       u16 sid;
 
        if (!meson_sm_get_serial(serial, SM_SERIAL_SIZE)) {
-               sid = crc32(0, (unsigned char *)serial, SM_SERIAL_SIZE);
-               /* Ensure the NIC specific bytes of the mac are not all 0 */
-               if ((sid & 0xffff) == 0)
-                       sid |= 0x800000;
-
-               /* OUI registered MAC address */
-               mac_addr[0] = 0x10;
-               mac_addr[1] = 0x27;
-               mac_addr[2] = 0xBE;
-               mac_addr[3] = (sid >> 16) & 0xff;
-               mac_addr[4] = (sid >>  8) & 0xff;
-               mac_addr[5] = (sid >>  0) & 0xff;
+               sid = crc32(0, (unsigned char *)serial, SM_SERIAL_SIZE) & 0xFFFF;
+               /* OUI registered fallback MAC address */
+               mac_addr[0] = 0xF0;
+               mac_addr[1] = 0x57;
+               mac_addr[2] = 0x8D;
+               mac_addr[3] = 0x00;
+               mac_addr[4] = (sid >>  8) & 0xFF;
+               mac_addr[5] = sid & 0xFF;
                mac_addr[ARP_HLEN] = '\0';
 
                eth_env_set_enetaddr("ethaddr", mac_addr);