Here are some observations/suggestions
The document contains a number of diagram's whose text is not searchable in Adobe Acrobat Reader DC 2018.009.20050
There is a lack of coherency in the naming throughout the document, making references in one location difficult to correlate with descriptions in others, and impossible to search effectively.
Table 51 Kernel clock distribution overview
The "Peripherals" column on the left should have the names of the clocks as it seen everywhere else.
ie SDMMC1 should make reference to sdmmc_ker_ck naming
Figure 46 Kernel clock distribution for SDMMC, QUADSPI and FMC
SDMMCSEL, sdmmc_ker_ck do not appear searchable, come up as block characters when cut-n-pasted.
8.4.17 RCC Domain 1 Kernel .. (RCC_D1CCIPR)
SDMMCSEL: SDMMC kernel clock source selection
Need to explicitly name "sdmmc_ker_ck" here so it cross references with all other uses, like per_ck is in CKPERSEL[1:0], and is searchable/indexed
This is just one example, but is a systemic issue in the document and all other places refer to clocks, etc by their internal net names.