From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/sh/kernel/cpu/sh4a/clock-sh7770.c | 73 ++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 arch/sh/kernel/cpu/sh4a/clock-sh7770.c (limited to 'arch/sh/kernel/cpu/sh4a/clock-sh7770.c') 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 000000000..5d36f334b --- /dev/null +++ b/arch/sh/kernel/cpu/sh4a/clock-sh7770.c @@ -0,0 +1,73 @@ +/* + * arch/sh/kernel/cpu/sh4a/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 +#include +#include +#include +#include + +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[(__raw_readl(FRQCR) >> 28) & 0x000f]; +} + +static struct sh_clk_ops sh7770_master_clk_ops = { + .init = master_clk_init, +}; + +static unsigned long module_clk_recalc(struct clk *clk) +{ + int idx = ((__raw_readl(FRQCR) >> 28) & 0x000f); + return clk->parent->rate / pfc_divisors[idx]; +} + +static struct sh_clk_ops sh7770_module_clk_ops = { + .recalc = module_clk_recalc, +}; + +static unsigned long bus_clk_recalc(struct clk *clk) +{ + int idx = (__raw_readl(FRQCR) & 0x000f); + return clk->parent->rate / bfc_divisors[idx]; +} + +static struct sh_clk_ops sh7770_bus_clk_ops = { + .recalc = bus_clk_recalc, +}; + +static unsigned long cpu_clk_recalc(struct clk *clk) +{ + int idx = ((__raw_readl(FRQCR) >> 24) & 0x000f); + return clk->parent->rate / ifc_divisors[idx]; +} + +static struct sh_clk_ops sh7770_cpu_clk_ops = { + .recalc = cpu_clk_recalc, +}; + +static struct sh_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 sh_clk_ops **ops, int idx) +{ + if (idx < ARRAY_SIZE(sh7770_clk_ops)) + *ops = sh7770_clk_ops[idx]; +} + -- cgit v1.2.3-54-g00ecf