From 1f4023cdd1bdbe6cb01d0b2cbd1f46207189e3cf Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven <geert+renesas@glider.be> Date: Wed, 21 Jun 2017 22:24:15 +0200 Subject: clk: renesas: cpg-mssr: Add support to restore core clocks during resume MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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> --- drivers/clk/renesas/rcar-gen3-cpg.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/clk/renesas/rcar-gen3-cpg.h') diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h index d756ef8b78eb..2e4284399f53 100644 --- a/drivers/clk/renesas/rcar-gen3-cpg.h +++ b/drivers/clk/renesas/rcar-gen3-cpg.h @@ -44,7 +44,8 @@ struct rcar_gen3_cpg_pll_config { struct clk *rcar_gen3_cpg_clk_register(struct device *dev, const struct cpg_core_clk *core, const struct cpg_mssr_info *info, - struct clk **clks, void __iomem *base); + struct clk **clks, void __iomem *base, + struct raw_notifier_head *notifiers); int rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config, unsigned int clk_extalr, u32 mode); -- cgit v1.2.3