1 files changed, 83 insertions, 0 deletions

diff --git a/arch/arm/mach-mmp/clock.c b/arch/arm/mach-mmp/clock.c
new file mode 100644
index 000000000000..2d9cc5a7122f
--- /dev/null
+++ b/arch/arm/mach-mmp/clock.c
@@ -0,0 +1,83 @@
+/*
+ *  linux/arch/arm/mach-mmp/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/spinlock.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/regs-apbc.h>
+#include "clock.h"
+
+static void apbc_clk_enable(struct clk *clk)
+{
+        uint32_t clk_rst;
+
+        clk_rst = APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(clk->fnclksel);
+        __raw_writel(clk_rst, clk->clk_rst);
+}
+
+static void apbc_clk_disable(struct clk *clk)
+{
+        __raw_writel(0, clk->clk_rst);
+}
+
+struct clkops apbc_clk_ops = {
+        .enable         = apbc_clk_enable,
+        .disable        = apbc_clk_disable,
+};
+
+static DEFINE_SPINLOCK(clocks_lock);
+
+int clk_enable(struct clk *clk)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&clocks_lock, flags);
+        if (clk->enabled++ == 0)
+                clk->ops->enable(clk);
+        spin_unlock_irqrestore(&clocks_lock, flags);
+        return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+        unsigned long flags;
+
+        WARN_ON(clk->enabled == 0);
+
+        spin_lock_irqsave(&clocks_lock, flags);
+        if (--clk->enabled == 0)
+                clk->ops->disable(clk);
+        spin_unlock_irqrestore(&clocks_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+        unsigned long rate;
+
+        if (clk->ops->getrate)
+                rate = clk->ops->getrate(clk);
+        else
+                rate = clk->rate;
+
+        return rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clks_register(struct clk_lookup *clks, size_t num)
+{
+        int i;
+
+        for (i = 0; i < num; i++)
+                clkdev_add(&clks[i]);
+}