[ARM] MXC: add clkdev support

This patch only adds general clkdev support without actually switching
any MXC architecture to clkdev.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/clock.c b/arch/arm/plat-mxc/clock.c
index 888dd33abf76..92e13566cd4f 100644
--- a/arch/arm/plat-mxc/clock.c
+++ b/arch/arm/plat-mxc/clock.c
@@ -48,6 +48,11 @@ static DEFINE_MUTEX(clocks_mutex);
  *-------------------------------------------------------------------------*/
 
 /*
+ * All the code inside #ifndef CONFIG_COMMON_CLKDEV can be removed once all
+ * MXC architectures have switched to using clkdev.
+ */
+#ifndef CONFIG_COMMON_CLKDEV
+/*
  * Retrieve a clock by name.
  *
  * Note that we first try to use device id on the bus
@@ -110,6 +115,7 @@ found:
         return clk;
 }
 EXPORT_SYMBOL(clk_get);
+#endif
 
 static void __clk_disable(struct clk *clk)
 {
@@ -187,6 +193,7 @@ unsigned long clk_get_rate(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_get_rate);
 
+#ifndef CONFIG_COMMON_CLKDEV
 /* Decrement the clock's module reference count */
 void clk_put(struct clk *clk)
 {
@@ -194,6 +201,7 @@ void clk_put(struct clk *clk)
                 module_put(clk->owner);
 }
 EXPORT_SYMBOL(clk_put);
+#endif
 
 /* Round the requested clock rate to the nearest supported
  * rate that is less than or equal to the requested rate.
@@ -257,6 +265,7 @@ struct clk *clk_get_parent(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_get_parent);
 
+#ifndef CONFIG_COMMON_CLKDEV
 /*
  * Add a new clock to the clock tree.
  */
@@ -327,6 +336,7 @@ static int __init mxc_setup_proc_entry(void)
 }
 
 late_initcall(mxc_setup_proc_entry);
+#endif /* CONFIG_PROC_FS */
 #endif
 
 /*
diff --git a/arch/arm/plat-mxc/include/mach/clkdev.h b/arch/arm/plat-mxc/include/mach/clkdev.h
new file mode 100644
index 000000000000..04b37a89801c
--- /dev/null
+++ b/arch/arm/plat-mxc/include/mach/clkdev.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif
diff --git a/arch/arm/plat-mxc/include/mach/clock.h b/arch/arm/plat-mxc/include/mach/clock.h
index b830655514eb..43a82d0c534d 100644
--- a/arch/arm/plat-mxc/include/mach/clock.h
+++ b/arch/arm/plat-mxc/include/mach/clock.h
@@ -26,9 +26,13 @@
 struct module;
 
 struct clk {
+#ifndef CONFIG_COMMON_CLKDEV
+        /* As soon as i.MX1 and i.MX31 switched to clkdev, this
+         * block can go away */
         struct list_head node;
         struct module *owner;
         const char *name;
+#endif
         int id;
         /* Source clock this clk depends on */
         struct clk *parent;