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@xxxxxx>
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
drivers/clk/clk.c | 19 +++++++++++++++++++
include/linux/clk-provider.h | 2 ++
2 files changed, 21 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 8a0254a..dd77577 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 df7379d..60c5187 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 */
--
1.9.1
