mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-08 22:24:32 +00:00
0f67e09e9e
Add a fsl_iim driver common to i.MX and MPC. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
48 lines
1.4 KiB
Text
48 lines
1.4 KiB
Text
Driver implementing the fuse API for Freescale's IC Identification Module (IIM)
|
|
|
|
This IP can be found on the following SoCs:
|
|
- MPC512x,
|
|
- i.MX25,
|
|
- i.MX27,
|
|
- i.MX31,
|
|
- i.MX35,
|
|
- i.MX51,
|
|
- i.MX53.
|
|
|
|
The section numbers in this file refer to the i.MX25 Reference Manual.
|
|
|
|
A fuse word contains 8 fuse bit slots, as explained in 30.4.2.2.1.
|
|
|
|
A bank contains 256 fuse word slots, as shown by the memory map in 30.3.1.
|
|
|
|
Some fuse bit or word slots may not have the corresponding fuses actually
|
|
implemented in the fusebox.
|
|
|
|
See the README files of the SoCs using this driver in order to know the
|
|
conventions used by U-Boot to store some specific data in the fuses, e.g. MAC
|
|
addresses.
|
|
|
|
Fuse operations:
|
|
|
|
Read
|
|
Read operations are implemented as read accesses to the shadow registers,
|
|
using "Word y of Bank x" from the register summary in 30.3.2. This is
|
|
explained in detail in 30.4.5.1.
|
|
|
|
Sense
|
|
Sense operations are implemented as explained in 30.4.5.2.
|
|
|
|
Program
|
|
Program operations are implemented as explained in 30.4.5.3. Following
|
|
this operation, the shadow registers are reloaded by the hardware (not
|
|
immediately, but this does not make any difference for a user reading
|
|
these registers).
|
|
|
|
Override
|
|
Override operations are implemented as write accesses to the shadow
|
|
registers, as explained in 30.4.5.4.
|
|
|
|
Configuration:
|
|
|
|
CONFIG_FSL_IIM
|
|
Define this to enable the fsl_iim driver.
|