ARM: tegra: clock: prevent accidental disables of cpu clock
Peripheral clocks that have no clock enable bit in the enable registers have their clk_num set to 0. Bit 0 in the clock enable registers is the CPU clock. Prevent disables on these peripheral clocks from accidentally disabling the CPU clock. Signed-off-by: Colin Cross <ccross@android.com> Acked-by: Olof Johansson <olof@lixom.net>
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