clk: mvebu: armada-37xx-periph: add DVFS support for cpu clocks

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When DVFS is enabled the CPU clock setting is done using an other set of
registers.

These Power Management registers are exposed through a syscon as they
will also be used by other drivers such as the cpufreq.

This patch add the possibility to modify the CPU frequency using the
associate load level matching the target frequency. Then all the
frequency switch is handle by the hardware.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
[sboyd@codeaurora.org: Grow a local variable for regmap pointer
to keep lines shorter]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

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Gregory CLEMENT 2017-11-30 14:40:29 +01:00 • committed by Stephen Boyd

parent 9818a7a4fd

commit 2089dc33ea

1 changed files with 217 additions and 4 deletions

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drivers/clk/mvebu/armada-37xx-periph.c

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