![Kuninori Morimoto](/assets/img/avatar_default.png)
Update license to use SPDX-License-Identifier instead of verbose license text. Link: http://lkml.kernel.org/r/87bm60csyl.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/sh/kernel/cpu/sh3/clock-sh7706.c
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*
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* SH7706 support for the clock framework
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*
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* Copyright (C) 2006 Takashi YOSHII
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*
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* Based on arch/sh/kernel/cpu/sh3/clock-sh7709.c
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* Copyright (C) 2005 Andriy Skulysh
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <asm/clock.h>
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#include <asm/freq.h>
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#include <asm/io.h>
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static int stc_multipliers[] = { 1, 2, 4, 1, 3, 6, 1, 1 };
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static int ifc_divisors[] = { 1, 2, 4, 1, 3, 1, 1, 1 };
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static int pfc_divisors[] = { 1, 2, 4, 1, 3, 6, 1, 1 };
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static void master_clk_init(struct clk *clk)
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{
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int frqcr = __raw_readw(FRQCR);
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int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
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clk->rate *= pfc_divisors[idx];
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}
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static struct sh_clk_ops sh7706_master_clk_ops = {
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.init = master_clk_init,
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};
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static unsigned long module_clk_recalc(struct clk *clk)
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{
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int frqcr = __raw_readw(FRQCR);
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int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
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return clk->parent->rate / pfc_divisors[idx];
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}
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static struct sh_clk_ops sh7706_module_clk_ops = {
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.recalc = module_clk_recalc,
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};
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static unsigned long bus_clk_recalc(struct clk *clk)
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{
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int frqcr = __raw_readw(FRQCR);
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int idx = ((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4);
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return clk->parent->rate / stc_multipliers[idx];
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}
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static struct sh_clk_ops sh7706_bus_clk_ops = {
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.recalc = bus_clk_recalc,
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};
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static unsigned long cpu_clk_recalc(struct clk *clk)
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{
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int frqcr = __raw_readw(FRQCR);
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int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
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return clk->parent->rate / ifc_divisors[idx];
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}
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static struct sh_clk_ops sh7706_cpu_clk_ops = {
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.recalc = cpu_clk_recalc,
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};
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static struct sh_clk_ops *sh7706_clk_ops[] = {
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&sh7706_master_clk_ops,
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&sh7706_module_clk_ops,
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&sh7706_bus_clk_ops,
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&sh7706_cpu_clk_ops,
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};
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void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
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{
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if (idx < ARRAY_SIZE(sh7706_clk_ops))
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*ops = sh7706_clk_ops[idx];
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}
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