Re: a case for a common efuse API?

From: Uwe Kleine-König
Date: Wed Jul 09 2014 - 03:24:39 EST


On Tue, Jul 08, 2014 at 01:00:23PM -0700, Stephen Boyd wrote:
> On MSM chips we have some efuses (called qfprom) where we store things
> like calibration data, speed bins, etc.
I don't have something constructive to say here, just want to point out
that on efm32 there is something similar. It's called "Device
Information (DI) Page" and contains "calibration values, a
unique identification number and other useful data".

Currently it is unused in mainline, but in my tree I access it directly
to determine cpu type (part number, part family number and Production
ID), flash and ram size, and the calibration settings for the ADC.

Best regards

Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | |
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at