[Darjeeling] Configure Darjeeling clocks #25990
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Signed-off-by: Robert Schilling <[email protected]>
main: 1GHz io: 1GHz usb (not used): 1 GHz AON: 62.5 MHz Signed-off-by: Robert Schilling <[email protected]>
Razer6
requested review from
matutem,
rswarbrick,
vogelpi,
alees24 and
a team
and removed request for
a team and
matutem
alees24
approved these changes
Jan 23, 2025
|
One thing that is missing here is the clock generators within the AST need to be tweaked to output those frequencies. |
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This PR changes the Darjeeling clocks to:
From IO,
clkmgrderives a 500 MHz and 250 MHz Clock.The
clkmgrneeded a tweak in the template. To measure the clock frequency, the clkmgr has some measurement circuitry. These regs are preloaded with defaults to (freq / f_aon) +- 10. For the 250 MHz IO_DIV4 clock, this ratio becomes 4 - 10, which is negative. This change ensures the lower value is clipped at 0.