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authorBellido Nicolas <ml@acolin.be>2005-10-28 16:51:43 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-10-28 16:51:43 +0100
commit4224b67c9a1d6cbf47b073970bd2db5a89557f92 (patch)
treec2e37463f5844f2f64dcfc8aff4620d903c6e647 /arch
parent4a91ca2eb6eff14bb23f709e6ebf189fdbcdaa22 (diff)
downloadop-kernel-dev-4224b67c9a1d6cbf47b073970bd2db5a89557f92.zip
op-kernel-dev-4224b67c9a1d6cbf47b073970bd2db5a89557f92.tar.gz
[ARM] 3040/1: AAEC-2000 - Preliminary clock interface support
Patch from Bellido Nicolas Here is a preliminary clock interface support for the AAEC-2000. Signed-off-by: Nicolas Bellido <ml@acolin.be> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-aaec2000/Makefile2
-rw-r--r--arch/arm/mach-aaec2000/clock.c110
-rw-r--r--arch/arm/mach-aaec2000/clock.h23
3 files changed, 134 insertions, 1 deletions
diff --git a/arch/arm/mach-aaec2000/Makefile b/arch/arm/mach-aaec2000/Makefile
index 20ec838..a8e462f 100644
--- a/arch/arm/mach-aaec2000/Makefile
+++ b/arch/arm/mach-aaec2000/Makefile
@@ -3,7 +3,7 @@
#
# Common support (must be linked before board specific support)
-obj-y += core.o
+obj-y += core.o clock.o
# Specific board support
obj-$(CONFIG_MACH_AAED2000) += aaed2000.o
diff --git a/arch/arm/mach-aaec2000/clock.c b/arch/arm/mach-aaec2000/clock.c
new file mode 100644
index 0000000..99e0191
--- /dev/null
+++ b/arch/arm/mach-aaec2000/clock.c
@@ -0,0 +1,110 @@
+/*
+ * linux/arch/arm/mach-aaec2000/clock.c
+ *
+ * Copyright (C) 2005 Nicolas Bellido Y Ortega
+ *
+ * Based on linux/arch/arm/mach-integrator/clock.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+
+#include <asm/semaphore.h>
+#include <asm/hardware/clock.h>
+
+#include "clock.h"
+
+static LIST_HEAD(clocks);
+static DECLARE_MUTEX(clocks_sem);
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ struct clk *p, *clk = ERR_PTR(-ENOENT);
+
+ down(&clocks_sem);
+ list_for_each_entry(p, &clocks, node) {
+ if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
+ clk = p;
+ break;
+ }
+ }
+ up(&clocks_sem);
+
+ return clk;
+}
+EXPORT_SYMBOL(clk_get);
+
+void clk_put(struct clk *clk)
+{
+ module_put(clk->owner);
+}
+EXPORT_SYMBOL(clk_put);
+
+int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+int clk_use(struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_use);
+
+void clk_unuse(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_unuse);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+ return rate;
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+int clk_register(struct clk *clk)
+{
+ down(&clocks_sem);
+ list_add(&clk->node, &clocks);
+ up(&clocks_sem);
+ return 0;
+}
+EXPORT_SYMBOL(clk_register);
+
+void clk_unregister(struct clk *clk)
+{
+ down(&clocks_sem);
+ list_del(&clk->node);
+ up(&clocks_sem);
+}
+EXPORT_SYMBOL(clk_unregister);
+
+static int __init clk_init(void)
+{
+ return 0;
+}
+arch_initcall(clk_init);
diff --git a/arch/arm/mach-aaec2000/clock.h b/arch/arm/mach-aaec2000/clock.h
new file mode 100644
index 0000000..d4bb74f
--- /dev/null
+++ b/arch/arm/mach-aaec2000/clock.h
@@ -0,0 +1,23 @@
+/*
+ * linux/arch/arm/mach-aaec2000/clock.h
+ *
+ * Copyright (C) 2005 Nicolas Bellido Y Ortega
+ *
+ * Based on linux/arch/arm/mach-integrator/clock.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+struct module;
+
+struct clk {
+ struct list_head node;
+ unsigned long rate;
+ struct module *owner;
+ const char *name;
+ void *data;
+};
+
+int clk_register(struct clk *clk);
+void clk_unregister(struct clk *clk);
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