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/*
* arch/sh/kernel/cpu/sh4a/clock-sh7785.c
*
* SH7785 support for the clock framework
*
* Copyright (C) 2007 - 2009 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 <linux/clk.h>
#include <linux/io.h>
#include <linux/cpufreq.h>
#include <asm/clock.h>
#include <asm/freq.h>
#include <cpu/sh7785.h>
/*
* Default rate for the root input clock, reset this with clk_set_rate()
* from the platform code.
*/
static struct clk extal_clk = {
.name = "extal",
.id = -1,
.rate = 33333333,
};
static unsigned long pll_recalc(struct clk *clk)
{
int multiplier;
multiplier = test_mode_pin(MODE_PIN_MODE4) ? 36 : 72;
return clk->parent->rate * multiplier;
}
static struct clk_ops pll_clk_ops = {
.recalc = pll_recalc,
};
static struct clk pll_clk = {
.name = "pll_clk",
.id = -1,
.ops = &pll_clk_ops,
.parent = &extal_clk,
.flags = CLK_ENABLE_ON_INIT,
};
static struct clk *clks[] = {
&extal_clk,
&pll_clk,
};
static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18,
24, 32, 36, 48 };
static struct clk_div_mult_table div4_table = {
.divisors = div2,
.nr_divisors = ARRAY_SIZE(div2),
};
enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_GA,
DIV4_DU, DIV4_P, DIV4_NR };
#define DIV4(_str, _bit, _mask, _flags) \
SH_CLK_DIV4(_str, &pll_clk, FRQMR1, _bit, _mask, _flags)
struct clk div4_clks[DIV4_NR] = {
[DIV4_P] = DIV4("peripheral_clk", 0, 0x0f80, 0),
[DIV4_DU] = DIV4("du_clk", 4, 0x0ff0, 0),
[DIV4_GA] = DIV4("ga_clk", 8, 0x0030, 0),
[DIV4_DDR] = DIV4("ddr_clk", 12, 0x000c, CLK_ENABLE_ON_INIT),
[DIV4_B] = DIV4("bus_clk", 16, 0x0fe0, CLK_ENABLE_ON_INIT),
[DIV4_SH] = DIV4("shyway_clk", 20, 0x000c, CLK_ENABLE_ON_INIT),
[DIV4_U] = DIV4("umem_clk", 24, 0x000c, CLK_ENABLE_ON_INIT),
[DIV4_I] = DIV4("cpu_clk", 28, 0x000e, CLK_ENABLE_ON_INIT),
};
#define MSTPCR0 0xffc80030
#define MSTPCR1 0xffc80034
static struct clk mstp_clks[] = {
/* MSTPCR0 */
SH_CLK_MSTP32("scif_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
SH_CLK_MSTP32("scif_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
SH_CLK_MSTP32("scif_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
SH_CLK_MSTP32("scif_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
SH_CLK_MSTP32("scif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
SH_CLK_MSTP32("scif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
SH_CLK_MSTP32("ssi_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 21, 0),
SH_CLK_MSTP32("ssi_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 20, 0),
SH_CLK_MSTP32("hac_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 17, 0),
SH_CLK_MSTP32("hac_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 16, 0),
SH_CLK_MSTP32("mmcif_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 13, 0),
SH_CLK_MSTP32("flctl_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 12, 0),
SH_CLK_MSTP32("tmu345_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 9, 0),
SH_CLK_MSTP32("tmu012_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 8, 0),
SH_CLK_MSTP32("siof_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 3, 0),
SH_CLK_MSTP32("hspi_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 2, 0),
/* MSTPCR1 */
SH_CLK_MSTP32("hudi_fck", -1, NULL, MSTPCR1, 19, 0),
SH_CLK_MSTP32("ubc_fck", -1, NULL, MSTPCR1, 17, 0),
SH_CLK_MSTP32("dmac_11_6_fck", -1, NULL, MSTPCR1, 5, 0),
SH_CLK_MSTP32("dmac_5_0_fck", -1, NULL, MSTPCR1, 4, 0),
SH_CLK_MSTP32("gdta_fck", -1, NULL, MSTPCR1, 0, 0),
};
int __init arch_clk_init(void)
{
int i, ret = 0;
for (i = 0; i < ARRAY_SIZE(clks); i++)
ret |= clk_register(clks[i]);
if (!ret)
ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
&div4_table);
if (!ret)
ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks));
return ret;
}
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