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68 lines
1.4 KiB
68 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* arch/sh/kernel/cpu/sh3/clock-sh7712.c |
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* |
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* SH7712 support for the clock framework |
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* |
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* Copyright (C) 2007 Andrew Murray <[email protected]> |
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* |
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* Based on arch/sh/kernel/cpu/sh3/clock-sh3.c |
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* Copyright (C) 2005 Paul Mundt |
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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 multipliers[] = { 1, 2, 3 }; |
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static int divisors[] = { 1, 2, 3, 4, 6 }; |
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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 & 0x0300) >> 8; |
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clk->rate *= multipliers[idx]; |
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} |
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static struct sh_clk_ops sh7712_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 & 0x0007; |
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return clk->parent->rate / divisors[idx]; |
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} |
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static struct sh_clk_ops sh7712_module_clk_ops = { |
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.recalc = module_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 & 0x0030) >> 4; |
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return clk->parent->rate / divisors[idx]; |
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} |
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static struct sh_clk_ops sh7712_cpu_clk_ops = { |
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.recalc = cpu_clk_recalc, |
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}; |
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static struct sh_clk_ops *sh7712_clk_ops[] = { |
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&sh7712_master_clk_ops, |
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&sh7712_module_clk_ops, |
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&sh7712_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(sh7712_clk_ops)) |
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*ops = sh7712_clk_ops[idx]; |
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} |
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