clk: renesas: cpg-mssr: Add support to restore core clocks during resume

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On R-Car Gen3 systems, PSCI system suspend powers down the SoC, possibly
losing clock configuration.  Hence add a notifier chain that can be used
by core clocks to save/restore clock state during system suspend/resume.

The implementation of the actual clock state save/restore operations is
clock-specific, and to be registered with the notifier chain in the SoC
or family-specific cpg_mssr_info.cpg_clk_register() callback.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

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This commit is contained in:

Geert Uytterhoeven 2017-06-21 22:24:15 +02:00

parent 560869100b

commit 1f4023cdd1

6 changed files with 23 additions and 11 deletions

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7

drivers/clk/renesas/rcar-gen2-cpg.c

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6

drivers/clk/renesas/rcar-gen2-cpg.h

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3

drivers/clk/renesas/rcar-gen3-cpg.c

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3

drivers/clk/renesas/rcar-gen3-cpg.h

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12

drivers/clk/renesas/renesas-cpg-mssr.c

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3

drivers/clk/renesas/renesas-cpg-mssr.h

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