clk: Add is_enabled callback

This allows us to better detect whether a clk is enabled or not.

- If we can ask a clk, ask it. If it's enabled, go on and ask parents
- If we can't ask it, but it can be enabled, depend on the enable_count.
  if it's positive, go on and ask parents
- If we can't ask it and it cannot be enabled, assume it is enabled
  and ask parents.

This makes the CLK_ALWAYS_ENABLED unnecessary, since the fixed clk now
always returns 1 in its is_enabled callback.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/clk.h b/include/linux/clk.h
index 4389cf8b93..37a4813ba5 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -182,8 +182,6 @@ struct clk {
 	unsigned long flags;
 };
 
-#define CLK_ALWAYS_ENABLED	(1 << 0)
-
 struct clk_div_table {
 	unsigned int	val;
 	unsigned int	div;
@@ -202,6 +200,8 @@ struct clk *clk_mux(const char *name, void __iomem *reg,
 struct clk *clk_gate(const char *name, const char *parent, void __iomem *reg,
 		u8 shift);
 
+int clk_is_enabled_always(struct clk *clk);
+
 int clk_register(struct clk *clk);
 
 struct clk *clk_lookup(const char *name);