| 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. |
