2 files changed, 52 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/clock.c b/arch/arm/mach-shmobile/clock.c
index e816ca9bd213..ad7df629d995 100644
--- a/arch/arm/mach-shmobile/clock.c
+++ b/arch/arm/mach-shmobile/clock.c
@@ -23,6 +23,19 @@
 #include <linux/init.h>
 #include <linux/sh_clk.h>
 #include <linux/export.h>
+#include <mach/clock.h>
+#include <mach/common.h>
+
+unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk)
+{
+        struct clk_ratio *p = clk->priv;
+
+        return clk->parent->rate / p->div * p->mul;
+};
+
+struct sh_clk_ops shmobile_fixed_ratio_clk_ops = {
+        .recalc = shmobile_fixed_ratio_clk_recalc,
+};
 
 int __init shmobile_clk_init(void)
 {
diff --git a/arch/arm/mach-shmobile/include/mach/clock.h b/arch/arm/mach-shmobile/include/mach/clock.h
new file mode 100644
index 000000000000..76ac61292e48
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/clock.h
@@ -0,0 +1,39 @@
+#ifndef CLOCK_H
+#define CLOCK_H
+
+unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk);
+extern struct sh_clk_ops shmobile_fixed_ratio_clk_ops;
+
+/* clock ratio */
+struct clk_ratio {
+        int mul;
+        int div;
+};
+
+#define SH_CLK_RATIO(name, m, d)                \
+static struct clk_ratio name ##_ratio = {       \
+        .mul = m,                               \
+        .div = d,                               \
+}
+
+#define SH_FIXED_RATIO_CLKg(name, p, r) \
+struct clk name = {                     \
+        .parent = &p,                           \
+        .ops    = &shmobile_fixed_ratio_clk_ops,\
+        .priv   = &r ## _ratio,                 \
+}
+
+#define SH_FIXED_RATIO_CLK(name, p, r)          \
+static SH_FIXED_RATIO_CLKg(name, p, r);
+
+#define SH_FIXED_RATIO_CLK_SET(name, p, m, d)   \
+        SH_CLK_RATIO(name, m, d);               \
+        SH_FIXED_RATIO_CLK(name, p, name);
+
+#define SH_CLK_SET_RATIO(p, m, d)       \
+{                       \
+        (p)->mul = m;   \
+        (p)->div = d;   \
+}
+
+#endif