[PATCH] sh: Simplistic clock framework

This adds a relatively simplistic clock framework for sh.  The initial goal
behind this is to clean up the arch/sh/kernel/time.c mess and to get the CPU
subtype-specific frequency setting and calculation code moved somewhere more
sensible.

This only deals with the core clocks at the moment, though it's trivial for
other drivers to define their own clocks as desired.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 61 insertions, 0 deletions

diff --git a/include/asm-sh/clock.h b/include/asm-sh/clock.h
new file mode 100644
index 0000000..fdfb75b
--- /dev/null
+++ b/include/asm-sh/clock.h
@@ -0,0 +1,61 @@
+#ifndef __ASM_SH_CLOCK_H
+#define __ASM_SH_CLOCK_H
+
+#include <linux/kref.h>
+#include <linux/list.h>
+#include <linux/seq_file.h>
+
+struct clk;
+
+struct clk_ops {
+	void (*init)(struct clk *clk);
+	void (*enable)(struct clk *clk);
+	void (*disable)(struct clk *clk);
+	void (*recalc)(struct clk *clk);
+	int (*set_rate)(struct clk *clk, unsigned long rate);
+};
+
+struct clk {
+	struct list_head	node;
+	const char		*name;
+
+	struct module		*owner;
+
+	struct clk		*parent;
+	struct clk_ops		*ops;
+
+	struct kref		kref;
+
+	unsigned long		rate;
+	unsigned long		flags;
+};
+
+#define CLK_ALWAYS_ENABLED	(1 << 0)
+#define CLK_RATE_PROPAGATES	(1 << 1)
+
+/* Should be defined by processor-specific code */
+void arch_init_clk_ops(struct clk_ops **, int type);
+
+/* arch/sh/kernel/cpu/clock.c */
+int clk_init(void);
+
+int __clk_enable(struct clk *);
+int clk_enable(struct clk *);
+
+void __clk_disable(struct clk *);
+void clk_disable(struct clk *);
+
+int clk_set_rate(struct clk *, unsigned long rate);
+unsigned long clk_get_rate(struct clk *);
+void clk_recalc_rate(struct clk *);
+
+struct clk *clk_get(const char *id);
+void clk_put(struct clk *);
+
+int clk_register(struct clk *);
+void clk_unregister(struct clk *);
+
+int show_clocks(struct seq_file *m);
+
+#endif /* __ASM_SH_CLOCK_H */
+