mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
1.6 KiB
70 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* arch/sh/kernel/cpu/sh4a/clock-sh7770.c |
|
* |
|
* SH7770 support for the clock framework |
|
* |
|
* Copyright (C) 2005 Paul Mundt |
|
*/ |
|
#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[(__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]; |
|
} |
|
|
|
|