Contributors: 5
Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
Paul Mundt |
278 |
90.85% |
5 |
45.45% |
Andrew Morton |
15 |
4.90% |
1 |
9.09% |
Magnus Damm |
6 |
1.96% |
1 |
9.09% |
Linus Torvalds (pre-git) |
5 |
1.63% |
3 |
27.27% |
Kuninori Morimoto |
2 |
0.65% |
1 |
9.09% |
Total |
306 |
|
11 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* arch/sh/kernel/cpu/sh4/clock-sh4.c
*
* Generic SH-4 support for the clock framework
*
* Copyright (C) 2005 Paul Mundt
*
* FRQCR parsing hacked out of arch/sh/kernel/time.c
*
* Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
* Copyright (C) 2002, 2003, 2004 Paul Mundt
* Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
*/
#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, 2, 3, 4, 6, 8, 1, 1 };
#define bfc_divisors ifc_divisors /* Same */
static int pfc_divisors[] = { 2, 3, 4, 6, 8, 2, 2, 2 };
static void master_clk_init(struct clk *clk)
{
clk->rate *= pfc_divisors[__raw_readw(FRQCR) & 0x0007];
}
static struct sh_clk_ops sh4_master_clk_ops = {
.init = master_clk_init,
};
static unsigned long module_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FRQCR) & 0x0007);
return clk->parent->rate / pfc_divisors[idx];
}
static struct sh_clk_ops sh4_module_clk_ops = {
.recalc = module_clk_recalc,
};
static unsigned long bus_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FRQCR) >> 3) & 0x0007;
return clk->parent->rate / bfc_divisors[idx];
}
static struct sh_clk_ops sh4_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static unsigned long cpu_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FRQCR) >> 6) & 0x0007;
return clk->parent->rate / ifc_divisors[idx];
}
static struct sh_clk_ops sh4_cpu_clk_ops = {
.recalc = cpu_clk_recalc,
};
static struct sh_clk_ops *sh4_clk_ops[] = {
&sh4_master_clk_ops,
&sh4_module_clk_ops,
&sh4_bus_clk_ops,
&sh4_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
{
if (idx < ARRAY_SIZE(sh4_clk_ops))
*ops = sh4_clk_ops[idx];
}