[PATCH 03/20] sh: clkfwk: add clk_rate_mult_range_round()

[PATCH 03/20] sh: clkfwk: add clk_rate_mult_range_round()

[Kuninori Morimoto]

Some clock pulse generator has PLL multiplication.
clk_rate_mult_range_round() will be good helper for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 drivers/sh/clk/core.c  |   20 ++++++++++++++++++++
 include/linux/sh_clk.h |    3 +++
 2 files changed, 23 insertions(+), 0 deletions(-)

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);
-- 
1.7.5.4

Re: [PATCH 03/20] sh: clkfwk: add clk_rate_mult_range_round()

[Paul Mundt]

On Thu, Nov 10, 2011 at 06:43:44PM -0800, Kuninori Morimoto wrote:
> Some clock pulse generator has PLL multiplication.
> clk_rate_mult_range_round() will be good helper for it.
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
>  drivers/sh/clk/core.c  |   20 ++++++++++++++++++++
>  include/linux/sh_clk.h |    3 +++
>  2 files changed, 23 insertions(+), 0 deletions(-)
> 
This is already applied to my common/clkfwk branch. I'll be sending it
out with the -rc2 updates.