Add a flag CLK_RUNTIME_PM, to let low-level clock drivers indicate that a clock is suitable for Runtime PM. Add clk_may_runtime_pm(), to get the status of the flag. This will allow the device core to enable automatic Runtime PM management for devices tied to clocks that are suitable for Runtime PM. Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> --- drivers/clk/clk.c | 12 ++++++++++++ include/linux/clk-provider.h | 1 + include/linux/clk.h | 1 + 3 files changed, 14 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 0b2819551756..a83a2cc0af67 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1115,6 +1115,18 @@ long clk_get_accuracy(struct clk *clk) EXPORT_SYMBOL_GPL(clk_get_accuracy); /** + * clk_may_runtime_pm - check if the clock is suitable for Runtime PM + * @clk: the clock to check + * + * Return true if the clock is suitable for Runtime PM + * Return false if clk is NULL, or if the clock is not suitable for Runtime PM. + */ +bool clk_may_runtime_pm(const struct clk *clk) +{ + return clk && clk->flags & CLK_RUNTIME_PM; +} + +/** * __clk_recalc_rates * @clk: first clk in the subtree * @msg: notification type (see include/linux/clk.h) diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 24c8ba4fa6ae..3ca9a7c1f02d 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -30,6 +30,7 @@ #define CLK_GET_RATE_NOCACHE BIT(6) /* do not use the cached clk rate */ #define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */ #define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */ +#define CLK_RUNTIME_PM BIT(9) /* clock is suitable for Runtime PM */ struct clk_hw; struct dentry; diff --git a/include/linux/clk.h b/include/linux/clk.h index d030fce1d77e..07f156580064 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -106,6 +106,7 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb); */ long clk_get_accuracy(struct clk *clk); +bool clk_may_runtime_pm(const struct clk *clk); #else /* !CONFIG_COMMON_CLK */ static inline long clk_get_accuracy(struct clk *clk) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html