Il 29/08/2012 17:18, Brad Arnold ha scritto:
Hi, I'm working on an embedded board which uses u-boot + linux. At manufacturing time, the device serial number will be programmed into OTP memory on NAND (probably from within u-boot). We'd like the linux kernel to make this serial number available to be read from userspace. Is there an accepted method to do this sort of thing? One idea I had was to make the serial number available as a device node (ie: you can simply read the serial number from "/dev/serialnumber"). Then there's the question of how the kernel learns the serial in the first place (a kernel boot command like parameter passed from u-boot?). Does this sound sane, or is there a better way to do something like this? Thanks, Brad
U-Boot manage a serial number via env variable "serial#". It provides several tools. You'll find under tools/env applications to read/write env variable of uboot, so reading from Linux is very simple. You should use a dedicated little space of flash to store the env variables.
Regards, Marco -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
