Burn exact MAC address to eFuse in imx6

davidyu — Tue, 11 Mar 2014 08:43:53 GMT

I know one can use "echo" command to write MAC address to HW_OCOTP_MAC0 via sysfs.

But another question is : MAC address is 48-bit ,however, each fuse block is 32 bit.

All examples that we found is "echo 0x10234567 > /sys/fsl_otp/HW_OCOTP_MAC0" , cannot found 48-bit version.

Is separate MAC address to two part, first part (i.e. first 16bit) burn to HW_OCOTP_MAC0 and rest part burn to HW_OCOTP_MAC1 ?

Thanks for kindly help!

Re: Burn exact MAC address to eFuse in imx6

Yuri — Fri, 27 Jun 2014 02:26:23 GMT

For the 48bits on the MAC ADDR there are two mac registers: HW_OCOTP_MAC0 and HW_OCOTP_MAC1

The order is a follows

HW_OCOTP_MAC1 = (((mac_data[0] & 0xFF) << 8) | (mac_data[1] & 0xFF));

HW_OCOTP_MAC0 = (((mac_data[2] & 0xFF) << 24) | ((mac_data[3] & 0xFF) << 16) | ((mac_data[4] & 0xFF) << 8) | (mac_data[5] & 0xFF));

Have a great day,
Yuri

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i.MX ProcessorsのトピックRe: Burn exact MAC address to eFuse in imx6

Burn exact MAC address to eFuse in imx6

Re: Burn exact MAC address to eFuse in imx6