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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>
hifive-unleashed-5.1
Keerthy 2018-09-04 12:19:36 +05:30 committed by Tero Kristo
parent 8b95d1ce33
commit 435365485f
2 changed files with 21 additions and 0 deletions
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19
drivers/clk/clk.c
View File

@ -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;

2
include/linux/clk-provider.h
View File

@ -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 */