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author | Paul Mundt <lethal@linux-sh.org> | 2006-12-11 20:28:03 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2006-12-12 08:42:09 +0900 |
commit | 41504c39726a7099e5a42508dd57fe561c8b4129 (patch) | |
tree | 29e3ea77a973fc7ee137e78a03b2b6c24b99d559 /arch/sh/kernel/cpu/sh4a/clock-sh7770.c | |
parent | 5432143464ee7f5cb8b0b015a0fd1c3279af10ae (diff) | |
download | kernel_samsung_smdk4412-41504c39726a7099e5a42508dd57fe561c8b4129.zip kernel_samsung_smdk4412-41504c39726a7099e5a42508dd57fe561c8b4129.tar.gz kernel_samsung_smdk4412-41504c39726a7099e5a42508dd57fe561c8b4129.tar.bz2 |
sh: SH-MobileR SH7722 CPU support.
This adds CPU support for the SH7722.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/clock-sh7770.c')
-rw-r--r-- | arch/sh/kernel/cpu/sh4a/clock-sh7770.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7770.c b/arch/sh/kernel/cpu/sh4a/clock-sh7770.c new file mode 100644 index 0000000..c8694ba --- /dev/null +++ b/arch/sh/kernel/cpu/sh4a/clock-sh7770.c @@ -0,0 +1,73 @@ +/* + * arch/sh/kernel/cpu/sh4/clock-sh7770.c + * + * SH7770 support for the clock framework + * + * 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> + +static int ifc_divisors[] = { 1, 1, 1, 1, 1, 1, 1, 1 }; +static int bfc_divisors[] = { 1, 1, 1, 1, 1, 8,12, 1 }; +static int pfc_divisors[] = { 1, 8, 1,10,12,16, 1, 1 }; + +static void master_clk_init(struct clk *clk) +{ + clk->rate *= pfc_divisors[(ctrl_inl(FRQCR) >> 28) & 0x000f]; +} + +static struct clk_ops sh7770_master_clk_ops = { + .init = master_clk_init, +}; + +static void module_clk_recalc(struct clk *clk) +{ + int idx = ((ctrl_inl(FRQCR) >> 28) & 0x000f); + clk->rate = clk->parent->rate / pfc_divisors[idx]; +} + +static struct clk_ops sh7770_module_clk_ops = { + .recalc = module_clk_recalc, +}; + +static void bus_clk_recalc(struct clk *clk) +{ + int idx = (ctrl_inl(FRQCR) & 0x000f); + clk->rate = clk->parent->rate / bfc_divisors[idx]; +} + +static struct clk_ops sh7770_bus_clk_ops = { + .recalc = bus_clk_recalc, +}; + +static void cpu_clk_recalc(struct clk *clk) +{ + int idx = ((ctrl_inl(FRQCR) >> 24) & 0x000f); + clk->rate = clk->parent->rate / ifc_divisors[idx]; +} + +static struct clk_ops sh7770_cpu_clk_ops = { + .recalc = cpu_clk_recalc, +}; + +static struct clk_ops *sh7770_clk_ops[] = { + &sh7770_master_clk_ops, + &sh7770_module_clk_ops, + &sh7770_bus_clk_ops, + &sh7770_cpu_clk_ops, +}; + +void __init arch_init_clk_ops(struct clk_ops **ops, int idx) +{ + if (idx < ARRAY_SIZE(sh7770_clk_ops)) + *ops = sh7770_clk_ops[idx]; +} + |