2 files changed, 24 insertions, 1 deletions

diff --git a/drivers/sh/clk.c b/drivers/sh/clk.c
index 3ac6fa0005b9..018be37ef339 100644
--- a/drivers/sh/clk.c
+++ b/drivers/sh/clk.c
@@ -76,7 +76,7 @@ struct clk_rate_round_data;
 struct clk_rate_round_data {
         unsigned long rate;
         unsigned int min, max;
-        long (*func)(unsigned int pos, struct clk_rate_round_data *arg);
+        long (*func)(unsigned int, struct clk_rate_round_data *);
         void *arg;
 };
 
@@ -148,6 +148,26 @@ long clk_rate_table_round(struct clk *clk,
         return clk_rate_round_helper(&table_round);
 }
 
+static long clk_rate_div_range_iter(unsigned int pos,
+                                    struct clk_rate_round_data *rounder)
+{
+        return clk_get_rate(rounder->arg) / pos;
+}
+
+long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
+                              unsigned int div_max, unsigned long rate)
+{
+        struct clk_rate_round_data div_range_round = {
+                .min    = div_min,
+                .max    = div_max,
+                .func   = clk_rate_div_range_iter,
+                .arg    = clk_get_parent(clk),
+                .rate   = rate,
+        };
+
+        return clk_rate_round_helper(&div_range_round);
+}
+
 int clk_rate_table_find(struct clk *clk,
                         struct cpufreq_frequency_table *freq_table,
                         unsigned long rate)
diff --git a/include/linux/sh_clk.h b/include/linux/sh_clk.h
index 49f6e9b6eda2..4dca992f3093 100644
--- a/include/linux/sh_clk.h
+++ b/include/linux/sh_clk.h
@@ -119,6 +119,9 @@ int clk_rate_table_find(struct clk *clk,
                         struct cpufreq_frequency_table *freq_table,
                         unsigned long rate);
 
+long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
+                              unsigned int div_max, unsigned long rate);
+
 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags)        \
 {                                                                       \
         .parent         = _parent,                                      \