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Diffstat (limited to 'arch/m68k/platform/coldfire/clk.c')
-rw-r--r--arch/m68k/platform/coldfire/clk.c111
1 files changed, 110 insertions, 1 deletions
diff --git a/arch/m68k/platform/coldfire/clk.c b/arch/m68k/platform/coldfire/clk.c
index 9f1260c5e2a..75f9ee967ea 100644
--- a/arch/m68k/platform/coldfire/clk.c
+++ b/arch/m68k/platform/coldfire/clk.c
@@ -10,11 +10,17 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/mcfclk.h>
/***************************************************************************/
-
+#ifndef MCFPM_PPMCR0
struct clk *clk_get(struct device *dev, const char *id)
{
return NULL;
@@ -42,4 +48,107 @@ unsigned long clk_get_rate(struct clk *clk)
return MCF_CLK;
}
EXPORT_SYMBOL(clk_get_rate);
+#else
+static DEFINE_SPINLOCK(clk_lock);
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ const char *clk_name = dev ? dev_name(dev) : id ? id : NULL;
+ struct clk *clk;
+ unsigned i;
+
+ for (i = 0; (clk = mcf_clks[i]) != NULL; ++i)
+ if (!strcmp(clk->name, clk_name))
+ return clk;
+ pr_warn("clk_get: didn't find clock %s\n", clk_name);
+ return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&clk_lock, flags);
+ if ((clk->enabled++ == 0) && clk->clk_ops)
+ clk->clk_ops->enable(clk);
+ spin_unlock_irqrestore(&clk_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&clk_lock, flags);
+ if ((--clk->enabled == 0) && clk->clk_ops)
+ clk->clk_ops->disable(clk);
+ spin_unlock_irqrestore(&clk_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+void clk_put(struct clk *clk)
+{
+ if (clk->enabled != 0)
+ pr_warn("clk_put %s still enabled\n", clk->name);
+}
+EXPORT_SYMBOL(clk_put);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
/***************************************************************************/
+
+void __clk_init_enabled(struct clk *clk)
+{
+ clk->enabled = 1;
+ clk->clk_ops->enable(clk);
+}
+
+void __clk_init_disabled(struct clk *clk)
+{
+ clk->enabled = 0;
+ clk->clk_ops->disable(clk);
+}
+
+static void __clk_enable0(struct clk *clk)
+{
+ __raw_writeb(clk->slot, MCFPM_PPMCR0);
+}
+
+static void __clk_disable0(struct clk *clk)
+{
+ __raw_writeb(clk->slot, MCFPM_PPMSR0);
+}
+
+struct clk_ops clk_ops0 = {
+ .enable = __clk_enable0,
+ .disable = __clk_disable0,
+};
+
+#ifdef MCFPM_PPMCR1
+static void __clk_enable1(struct clk *clk)
+{
+ __raw_writeb(clk->slot, MCFPM_PPMCR1);
+}
+
+static void __clk_disable1(struct clk *clk)
+{
+ __raw_writeb(clk->slot, MCFPM_PPMSR1);
+}
+
+struct clk_ops clk_ops1 = {
+ .enable = __clk_enable1,
+ .disable = __clk_disable1,
+};
+#endif /* MCFPM_PPMCR1 */
+#endif /* MCFPM_PPMCR0 */
+
+struct clk *devm_clk_get(struct device *dev, const char *id)
+{
+ return NULL;
+}
+EXPORT_SYMBOL(devm_clk_get);