1 Driver implementing the fuse API for Freescale's IC Identification Module (IIM) 2 3 This IP can be found on the following SoCs: 4 - MPC512x, 5 - i.MX25, 6 - i.MX27, 7 - i.MX31, 8 - i.MX35, 9 - i.MX51, 10 - i.MX53. 11 12 The section numbers in this file refer to the i.MX25 Reference Manual. 13 14 A fuse word contains 8 fuse bit slots, as explained in 30.4.2.2.1. 15 16 A bank contains 256 fuse word slots, as shown by the memory map in 30.3.1. 17 18 Some fuse bit or word slots may not have the corresponding fuses actually 19 implemented in the fusebox. 20 21 See the README files of the SoCs using this driver in order to know the 22 conventions used by U-Boot to store some specific data in the fuses, e.g. MAC 23 addresses. 24 25 Fuse operations: 26 27 Read 28 Read operations are implemented as read accesses to the shadow registers, 29 using "Word y of Bank x" from the register summary in 30.3.2. This is 30 explained in detail in 30.4.5.1. 31 32 Sense 33 Sense operations are implemented as explained in 30.4.5.2. 34 35 Program 36 Program operations are implemented as explained in 30.4.5.3. Following 37 this operation, the shadow registers are reloaded by the hardware (not 38 immediately, but this does not make any difference for a user reading 39 these registers). 40 41 Override 42 Override operations are implemented as write accesses to the shadow 43 registers, as explained in 30.4.5.4. 44 45 Configuration: 46 47 CONFIG_FSL_IIM 48 Define this to enable the fsl_iim driver. 49
