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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-01-31 10:05:51 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-02-08 17:50:42 +0000
commit3f0a820c4c0b4670fb5f164baa5582e23c2ef118 (patch)
tree6af02e1456c0316791ab95e7da9c09496f29c232 /arch/arm/plat-omap/include
parentb5088c0d90b898802318c62caf2320a53df6ce57 (diff)
[ARM] omap: create a proper tree of clocks
Traditionally, we've tracked the parent/child relationships between clk structures by setting the child's parent member to point at the upstream clock. As a result, when decending the tree, we have had to scan all clocks to find the children. Avoid this wasteful scanning by keeping a list of the clock's children. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-omap/include')
-rw-r--r--arch/arm/plat-omap/include/mach/clock.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/plat-omap/include/mach/clock.h b/arch/arm/plat-omap/include/mach/clock.h
index 8705902de1d..af6ae4fa46d 100644
--- a/arch/arm/plat-omap/include/mach/clock.h
+++ b/arch/arm/plat-omap/include/mach/clock.h
@@ -70,6 +70,8 @@ struct clk {
const char *name;
int id;
struct clk *parent;
+ struct list_head children;
+ struct list_head sibling; /* node for children */
unsigned long rate;
__u32 flags;
void __iomem *enable_reg;
@@ -115,7 +117,9 @@ struct clk_functions {
extern unsigned int mpurate;
extern int clk_init(struct clk_functions *custom_clocks);
+extern void clk_init_one(struct clk *clk);
extern int clk_register(struct clk *clk);
+extern void clk_reparent(struct clk *child, struct clk *parent);
extern void clk_unregister(struct clk *clk);
extern void propagate_rate(struct clk *clk);
extern void recalculate_root_clocks(void);
@@ -131,8 +135,7 @@ extern const struct clkops clkops_null;
/* Clock flags */
/* bit 0 is free */
#define RATE_FIXED (1 << 1) /* Fixed clock rate */
-#define RATE_PROPAGATES (1 << 2) /* Program children too */
-/* bits 3-4 are free */
+/* bits 2-4 are free */
#define ENABLE_REG_32BIT (1 << 5) /* Use 32-bit access */
#define CLOCK_IDLE_CONTROL (1 << 7)
#define CLOCK_NO_IDLE_PARENT (1 << 8)