178 lines
5.5 KiB
C
Executable file
178 lines
5.5 KiB
C
Executable file
/*
|
|
* arch/sh/kernel/cpu/sh4a/clock-sh7785.c
|
|
*
|
|
* SH7785 support for the clock framework
|
|
*
|
|
* Copyright (C) 2007 - 2010 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 <linux/clkdev.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 = {
|
|
.rate = 33333333,
|
|
};
|
|
|
|
static unsigned long pll_recalc(struct clk *clk)
|
|
{
|
|
int multiplier;
|
|
|
|
multiplier = test_mode_pin(MODE_PIN4) ? 36 : 72;
|
|
|
|
return clk->parent->rate * multiplier;
|
|
}
|
|
|
|
static struct sh_clk_ops pll_clk_ops = {
|
|
.recalc = pll_recalc,
|
|
};
|
|
|
|
static struct clk pll_clk = {
|
|
.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_div_mult_table = {
|
|
.divisors = div2,
|
|
.nr_divisors = ARRAY_SIZE(div2),
|
|
};
|
|
|
|
static struct clk_div4_table div4_table = {
|
|
.div_mult_table = &div4_div_mult_table,
|
|
};
|
|
|
|
enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_GA,
|
|
DIV4_DU, DIV4_P, DIV4_NR };
|
|
|
|
#define DIV4(_bit, _mask, _flags) \
|
|
SH_CLK_DIV4(&pll_clk, FRQMR1, _bit, _mask, _flags)
|
|
|
|
struct clk div4_clks[DIV4_NR] = {
|
|
[DIV4_P] = DIV4(0, 0x0f80, 0),
|
|
[DIV4_DU] = DIV4(4, 0x0ff0, 0),
|
|
[DIV4_GA] = DIV4(8, 0x0030, 0),
|
|
[DIV4_DDR] = DIV4(12, 0x000c, CLK_ENABLE_ON_INIT),
|
|
[DIV4_B] = DIV4(16, 0x0fe0, CLK_ENABLE_ON_INIT),
|
|
[DIV4_SH] = DIV4(20, 0x000c, CLK_ENABLE_ON_INIT),
|
|
[DIV4_U] = DIV4(24, 0x000c, CLK_ENABLE_ON_INIT),
|
|
[DIV4_I] = DIV4(28, 0x000e, CLK_ENABLE_ON_INIT),
|
|
};
|
|
|
|
#define MSTPCR0 0xffc80030
|
|
#define MSTPCR1 0xffc80034
|
|
|
|
enum { MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024,
|
|
MSTP021, MSTP020, MSTP017, MSTP016,
|
|
MSTP013, MSTP012, MSTP009, MSTP008, MSTP003, MSTP002,
|
|
MSTP119, MSTP117, MSTP105, MSTP104, MSTP100,
|
|
MSTP_NR };
|
|
|
|
static struct clk mstp_clks[MSTP_NR] = {
|
|
/* MSTPCR0 */
|
|
[MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0),
|
|
[MSTP028] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 28, 0),
|
|
[MSTP027] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 27, 0),
|
|
[MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0),
|
|
[MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0),
|
|
[MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0),
|
|
[MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0),
|
|
[MSTP020] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 20, 0),
|
|
[MSTP017] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 17, 0),
|
|
[MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0),
|
|
[MSTP013] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 13, 0),
|
|
[MSTP012] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 12, 0),
|
|
[MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0),
|
|
[MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0),
|
|
[MSTP003] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 3, 0),
|
|
[MSTP002] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 2, 0),
|
|
|
|
/* MSTPCR1 */
|
|
[MSTP119] = SH_CLK_MSTP32(NULL, MSTPCR1, 19, 0),
|
|
[MSTP117] = SH_CLK_MSTP32(NULL, MSTPCR1, 17, 0),
|
|
[MSTP105] = SH_CLK_MSTP32(NULL, MSTPCR1, 5, 0),
|
|
[MSTP104] = SH_CLK_MSTP32(NULL, MSTPCR1, 4, 0),
|
|
[MSTP100] = SH_CLK_MSTP32(NULL, MSTPCR1, 0, 0),
|
|
};
|
|
|
|
static struct clk_lookup lookups[] = {
|
|
/* main clocks */
|
|
CLKDEV_CON_ID("extal", &extal_clk),
|
|
CLKDEV_CON_ID("pll_clk", &pll_clk),
|
|
|
|
/* DIV4 clocks */
|
|
CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
|
|
CLKDEV_CON_ID("du_clk", &div4_clks[DIV4_DU]),
|
|
CLKDEV_CON_ID("ga_clk", &div4_clks[DIV4_GA]),
|
|
CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_DDR]),
|
|
CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
|
|
CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
|
|
CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]),
|
|
CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
|
|
|
|
/* MSTP32 clocks */
|
|
CLKDEV_ICK_ID("fck", "sh-sci.5", &mstp_clks[MSTP029]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.4", &mstp_clks[MSTP028]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.3", &mstp_clks[MSTP027]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.2", &mstp_clks[MSTP026]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.1", &mstp_clks[MSTP025]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.0", &mstp_clks[MSTP024]),
|
|
|
|
CLKDEV_CON_ID("ssi1_fck", &mstp_clks[MSTP021]),
|
|
CLKDEV_CON_ID("ssi0_fck", &mstp_clks[MSTP020]),
|
|
CLKDEV_CON_ID("hac1_fck", &mstp_clks[MSTP017]),
|
|
CLKDEV_CON_ID("hac0_fck", &mstp_clks[MSTP016]),
|
|
CLKDEV_CON_ID("mmcif_fck", &mstp_clks[MSTP013]),
|
|
CLKDEV_CON_ID("flctl_fck", &mstp_clks[MSTP012]),
|
|
|
|
CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP008]),
|
|
CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP009]),
|
|
|
|
CLKDEV_CON_ID("siof_fck", &mstp_clks[MSTP003]),
|
|
CLKDEV_CON_ID("hspi_fck", &mstp_clks[MSTP002]),
|
|
CLKDEV_CON_ID("hudi_fck", &mstp_clks[MSTP119]),
|
|
CLKDEV_CON_ID("ubc0", &mstp_clks[MSTP117]),
|
|
CLKDEV_CON_ID("dmac_11_6_fck", &mstp_clks[MSTP105]),
|
|
CLKDEV_CON_ID("dmac_5_0_fck", &mstp_clks[MSTP104]),
|
|
CLKDEV_CON_ID("gdta_fck", &mstp_clks[MSTP100]),
|
|
};
|
|
|
|
int __init arch_clk_init(void)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(clks); i++)
|
|
ret |= clk_register(clks[i]);
|
|
|
|
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
|
|
|
|
if (!ret)
|
|
ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
|
|
&div4_table);
|
|
if (!ret)
|
|
ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
|
|
|
|
return ret;
|
|
}
|