From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Tue, 20 Sep 2011 01:51:13 +0000 (-0700)
Subject: sh: clkfwk: add clk_rate_mult_range_round()
X-Git-Tag: upstream/snapshot3+hdmi~8730^2~1^3~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dd2c0ca1b153b555c09fd8e08f6842e12cf8e87b;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

sh: clkfwk: add clk_rate_mult_range_round()

This provides a clk_rate_mult_range_round() helper for use by some of the
CPG PLL ranged multipliers, following the same approach as used by the
div ranges.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/drivers/sh/clk/core.c b/drivers/sh/clk/core.c
index dc8d022..352036b 100644
--- a/drivers/sh/clk/core.c
+++ b/drivers/sh/clk/core.c
@@ -173,6 +173,26 @@ long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
 	return clk_rate_round_helper(&div_range_round);
 }
 
+static long clk_rate_mult_range_iter(unsigned int pos,
+				      struct clk_rate_round_data *rounder)
+{
+	return clk_get_rate(rounder->arg) * pos;
+}
+
+long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
+			       unsigned int mult_max, unsigned long rate)
+{
+	struct clk_rate_round_data mult_range_round = {
+		.min	= mult_min,
+		.max	= mult_max,
+		.func	= clk_rate_mult_range_iter,
+		.arg	= clk_get_parent(clk),
+		.rate	= rate,
+	};
+
+	return clk_rate_round_helper(&mult_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 3ccf186..9237c29 100644
--- a/include/linux/sh_clk.h
+++ b/include/linux/sh_clk.h
@@ -94,6 +94,9 @@ int clk_rate_table_find(struct clk *clk,
 long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
 			      unsigned int div_max, unsigned long rate);
 
+long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
+			       unsigned int mult_max, unsigned long rate);
+
 long clk_round_parent(struct clk *clk, unsigned long target,
 		      unsigned long *best_freq, unsigned long *parent_freq,
 		      unsigned int div_min, unsigned int div_max);