diff options
| author | Keerthy <j-keerthy@ti.com> | 2018-09-04 08:49:36 +0200 |
|---|---|---|
| committer | Tero Kristo <t-kristo@ti.com> | 2018-10-03 14:29:15 +0200 |
| commit | 435365485f40cf12747d1daa2253a4f4b46b8148 (patch) | |
| tree | 62c9d83c8512fd4ac19afa38ce97c2a3165a57f4 | |
| parent | clk: Add functions to save/restore clock context en-masse (diff) | |
| download | linux-435365485f40cf12747d1daa2253a4f4b46b8148.tar.xz linux-435365485f40cf12747d1daa2253a4f4b46b8148.zip | |
clk: clk: Add clk_gate_restore_context function
The clock gate restore context function enables or disables
the gate clocks based on the enable_count. This is done in cases
where the clock context is lost and based on the enable_count
the clock either needs to be enabled/disabled.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
| -rw-r--r-- | drivers/clk/clk.c | 19 | ||||
| -rw-r--r-- | include/linux/clk-provider.h | 2 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 8a0254a1c303..dd775771a7cc 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -923,6 +923,25 @@ static int clk_core_enable_lock(struct clk_core *core) return ret; } +/** + * clk_gate_restore_context - restore context for poweroff + * @hw: the clk_hw pointer of clock whose state is to be restored + * + * The clock gate restore context function enables or disables + * the gate clocks based on the enable_count. This is done in cases + * where the clock context is lost and based on the enable_count + * the clock either needs to be enabled/disabled. This + * helps restore the state of gate clocks. + */ +void clk_gate_restore_context(struct clk_hw *hw) +{ + if (hw->clk->core->enable_count) + hw->clk->core->ops->enable(hw); + else + hw->clk->core->ops->disable(hw); +} +EXPORT_SYMBOL_GPL(clk_gate_restore_context); + static int _clk_save_context(struct clk_core *clk) { struct clk_core *child; diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index df7379da6269..60c51871b04b 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -1018,5 +1018,7 @@ static inline void clk_writel(u32 val, u32 __iomem *reg) #endif /* platform dependent I/O accessors */ +void clk_gate_restore_context(struct clk_hw *hw); + #endif /* CONFIG_COMMON_CLK */ #endif /* CLK_PROVIDER_H */ |