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yaml --- r: 77840 b: refs/heads/master c: c3aa92a h: refs/heads/master v: v3
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Andrew Murray
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Paul Mundt
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Jan 28, 2008
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refs/heads/master: 7d740a066fb9c6681c2898c7977209725c9e552f | ||
refs/heads/master: c3aa92afd0a6c253df974556b4a43c0a182d1fc4 |
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/* | ||
* arch/sh/kernel/cpu/sh3/clock-sh7712.c | ||
* | ||
* SH7712 support for the clock framework | ||
* | ||
* Copyright (C) 2007 Andrew Murray <amurray@mpc-data.co.uk> | ||
* | ||
* Based on arch/sh/kernel/cpu/sh3/clock-sh3.c | ||
* Copyright (C) 2005 Paul Mundt | ||
* | ||
* This file is subject to the terms and conditions of the GNU General Public | ||
* License. See the file "COPYING" in the main directory of this archive | ||
* for more details. | ||
*/ | ||
#include <linux/init.h> | ||
#include <linux/kernel.h> | ||
#include <asm/clock.h> | ||
#include <asm/freq.h> | ||
#include <asm/io.h> | ||
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static int multipliers[] = { 1, 2, 3 }; | ||
static int divisors[] = { 1, 2, 3, 4, 6 }; | ||
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static void master_clk_init(struct clk *clk) | ||
{ | ||
int frqcr = ctrl_inw(FRQCR); | ||
int idx = (frqcr & 0x0300) >> 8; | ||
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clk->rate *= multipliers[idx]; | ||
} | ||
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static struct clk_ops sh7712_master_clk_ops = { | ||
.init = master_clk_init, | ||
}; | ||
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static void module_clk_recalc(struct clk *clk) | ||
{ | ||
int frqcr = ctrl_inw(FRQCR); | ||
int idx = frqcr & 0x0007; | ||
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clk->rate = clk->parent->rate / divisors[idx]; | ||
} | ||
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static struct clk_ops sh7712_module_clk_ops = { | ||
.recalc = module_clk_recalc, | ||
}; | ||
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static void cpu_clk_recalc(struct clk *clk) | ||
{ | ||
int frqcr = ctrl_inw(FRQCR); | ||
int idx = (frqcr & 0x0030) >> 4; | ||
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clk->rate = clk->parent->rate / divisors[idx]; | ||
} | ||
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static struct clk_ops sh7712_cpu_clk_ops = { | ||
.recalc = cpu_clk_recalc, | ||
}; | ||
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static struct clk_ops *sh7712_clk_ops[] = { | ||
&sh7712_master_clk_ops, | ||
&sh7712_module_clk_ops, | ||
&sh7712_cpu_clk_ops, | ||
}; | ||
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void __init arch_init_clk_ops(struct clk_ops **ops, int idx) | ||
{ | ||
if (idx < ARRAY_SIZE(sh7712_clk_ops)) | ||
*ops = sh7712_clk_ops[idx]; | ||
} | ||
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