[PATCH v2 1/4] clk: samsung: register clk_div_tables for divider clocks

[Heiko Stübner]

On some Samsung platforms divider clocks only use specific divider combinations
like the armdiv on s3c2443 and s3c2416. For these usecases the generic divider
clock already provides the option of providing a lookup table mapping register
values to divider values.

Therefore add a new field to samsung_div_clock and if filled with a table,
use clk_register_divider_table instead of clk_register_divider to register
a divider clock

Signed-off-by: Heiko Stuebner <heiko at sntech.de>
Reviewed-by: Thomas Abraham <thomas.abraham at linaro.org>
---
 drivers/clk/samsung/clk.c |   14 +++++++++++---
 drivers/clk/samsung/clk.h |   13 +++++++++----
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index 91d12f3..d36cdd5 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -183,9 +183,17 @@ void __init samsung_clk_register_div(struct samsung_div_clock *list,
 	unsigned int idx, ret;
 
 	for (idx = 0; idx < nr_clk; idx++, list++) {
-		clk = clk_register_divider(NULL, list->name, list->parent_name,
-			list->flags, reg_base + list->offset, list->shift,
-			list->width, list->div_flags, &lock);
+		if (list->table)
+			clk = clk_register_divider_table(NULL, list->name,
+					list->parent_name, list->flags,
+					reg_base + list->offset, list->shift,
+					list->width, list->div_flags,
+					list->table, &lock);
+		else
+			clk = clk_register_divider(NULL, list->name,
+					list->parent_name, list->flags,
+					reg_base + list->offset, list->shift,
+					list->width, list->div_flags, &lock);
 		if (IS_ERR(clk)) {
 			pr_err("%s: failed to register clock %s\n", __func__,
 				list->name);
diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
index 961192f..26a752b 100644
--- a/drivers/clk/samsung/clk.h
+++ b/drivers/clk/samsung/clk.h
@@ -150,9 +150,10 @@ struct samsung_div_clock {
 	u8			width;
 	u8			div_flags;
 	const char		*alias;
+	struct clk_div_table	*table;
 };
 
-#define __DIV(_id, dname, cname, pname, o, s, w, f, df, a)	\
+#define __DIV(_id, dname, cname, pname, o, s, w, f, df, a, t)	\
 	{							\
 		.id		= _id,				\
 		.dev_name	= dname,			\
@@ -164,16 +165,20 @@ struct samsung_div_clock {
 		.width		= w,				\
 		.div_flags	= df,				\
 		.alias		= a,				\
+		.table		= t,				\
 	}
 
 #define DIV(_id, cname, pname, o, s, w)				\
-	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL)
+	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL, NULL)
 
 #define DIV_A(_id, cname, pname, o, s, w, a)			\
-	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, a)
+	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, a, NULL)
 
 #define DIV_F(_id, cname, pname, o, s, w, f, df)		\
-	__DIV(_id, NULL, cname, pname, o, s, w, f, df, NULL)
+	__DIV(_id, NULL, cname, pname, o, s, w, f, df, NULL, NULL)
+
+#define DIV_T(_id, cname, pname, o, s, w, t)			\
+	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL, t)
 
 /**
  * struct samsung_gate_clock: information about gate clock
-- 
1.7.2.3