Quoting Joel Stanley (2018-06-28 16:15:40)

The HPLL can be configured through a register (SCU24), however some
platforms chose to configure it through the strapping settings and do
not use the register. This was not noticed as the logic for bit 18 in
SCU24 was confused: set means programmed, but the driver read it as set
means strapped.

This gives us the correct HPLL value on Palmetto systems, from which
most of the peripheral clocks are generated.

Fixes: 5eda5d79e4be ("clk: Add clock driver for ASPEED BMC SoCs")
Cc: stable at vger.kernel.org # v4.15
Reviewed-by: C?dric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Do you want this merged for -rc5? It sounds like on some systems this is
a problem, but I don't know if these systems are supposed to work yet or
not, so priority of this fix is not easy for me to understand.