linux-stable/arch/arm/mach-shmobile/clock.c
Kuninori Morimoto f5942c7621 ARM: shmobile: add struct clk_ratio and fixed ratio clock macro
Renesas chip has many clocks inside,
and some of them are using fixed ratio via parent clock.
Current shmobile clock code is using own divX_recalc function
and divX_clk_ops.
This patch can reduce these code

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-04-02 11:02:16 +09:00

60 lines
1.5 KiB
C

/*
* SH-Mobile Clock Framework
*
* Copyright (C) 2010 Magnus Damm
*
* Used together with arch/arm/common/clkdev.c and drivers/sh/clk.c.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/kernel.h>
#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)
{
/* Kick the child clocks.. */
recalculate_root_clocks();
/* Enable the necessary init clocks */
clk_enable_init_clocks();
return 0;
}
int __clk_get(struct clk *clk)
{
return 1;
}
EXPORT_SYMBOL(__clk_get);
void __clk_put(struct clk *clk)
{
}
EXPORT_SYMBOL(__clk_put);