/* linux/arch/arm/mach-s5p6442/clock.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* S5P6442 - Clock support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <mach/map.h>
#include <plat/cpu-freq.h>
#include <mach/regs-clock.h>
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/pll.h>
#include <plat/s5p-clock.h>
#include <plat/clock-clksrc.h>
#include <plat/s5p6442.h>
static struct clksrc_clk clk_mout_apll = {
.clk = {
.name = "mout_apll",
.id = -1,
},
.sources = &clk_src_apll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 },
};
static struct clksrc_clk clk_mout_mpll = {
.clk = {
.name = "mout_mpll",
.id = -1,
},
.sources = &clk_src_mpll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 4, .size = 1 },
};
static struct clksrc_clk clk_mout_epll = {
.clk = {
.name = "mout_epll",
.id = -1,
},
.sources = &clk_src_epll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 8, .size = 1 },
};
/* Possible clock sources for ARM Mux */
static struct clk *clk_src_arm_list[] = {
[1] = &clk_mout_apll.clk,
[2] = &clk_mout_mpll.clk,
};
static struct clksrc_sources clk_src_arm = {
.sources = clk_src_arm_list,
.nr_sources = ARRAY_SIZE(clk_src_arm_list),
};
static struct clksrc_clk clk_mout_arm = {
.clk = {
.name = "mout_arm",
.id = -1,
},
.sources = &clk_src_arm,
.reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 16, .size = 3 },
};
static struct clk clk_dout_a2m = {
.name = "dout_a2m",
.id = -1,
.parent = &clk_mout_apll.clk,
};
/* Possible clock sources for D0 Mux */
static struct clk *clk_src_d0_list[] = {
[1] = &clk_mout_mpll.clk,
[2] = &clk_dout_a2m,
};
static struct clksrc_sources clk_src_d0 = {
.sources = clk_src_d0_list,
.nr_sources = ARRAY_SIZE(clk_src_d0_list),
};
static struct clksrc_clk clk_mout_d0 = {
.clk = {
.name = "mout_d0",
.id = -1,
},
.sources = &clk_src_d0,
.reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 20, .size = 3 },
};
static struct clk clk_dout_apll = {
.name = "dout_apll",
.id = -1,
.parent = &clk_mout_arm.clk,
};
/* Possible clock sources for D0SYNC Mux */
static struct clk *clk_src_d0sync_list[] = {
[1] = &clk_mout_d0.clk,
[2] = &clk_dout_apll,
};
static struct clksrc_sources clk_src_d0sync = {
.sources = clk_src_d0sync_list,
.nr_sources = ARRAY_SIZE(clk_src_d0sync_list),
};
static struct clksrc_clk clk_mout_d0sync = {
.clk = {
.name = "mout_d0sync",
.id = -1,
},
.sources = &clk_src_d0sync,
.reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 28, .size = 3 },
};
/* Possible clock sources for D1 Mux */
static struct clk *clk_src_d1_list[] = {
[1] = &clk_mout_mpll.clk,
[2] = &clk_dout_a2m,
};
static struct clksrc_sources clk_src_d1 = {
.sources = clk_src_d1_list,
.nr_sources = ARRAY_SIZE(clk_src_d1_list),
};
static struct clksrc_clk clk_mout_d1 = {
.clk = {
.name = "mout_d1",
.id = -1,
},
.sources = &clk_src_d1,
.reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 24, .size = 3 },
};
/* Possible clock sources for D1SYNC Mux */
static struct clk *clk_src_d1sync_list[] = {
[1] = &clk_mout_d1.clk,
[2] = &clk_dout_apll,
};
static struct clksrc_sources clk_src_d1sync = {
.sources = clk_src_d1sync_list,
.nr_sources = ARRAY_SIZE(clk_src_d1sync_list),
};
static struct clksrc_clk clk_mout_d1sync = {
.clk = {
.name = "mout_d1sync",
.id = -1,
},
.sources = &clk_src_d1sync,
.reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 24, .size = 3 },
};
static struct clk clk_hclkd0 = {
.name = "hclkd0",
.id = -1,
.parent = &clk_mout_d0sync.clk,
};
static struct clk clk_hclkd1 = {
.name = "hclkd1",
.id = -1,
.parent = &clk_mout_d1sync.clk,
};
static struct clk clk_pclkd0 = {
.name = "pclkd0",
.id = -1,
.parent = &clk_hclkd0,
};
static struct clk clk_pclkd1 = {
.name = "pclkd1",
.id = -1,
.parent = &clk_hclkd1,
};
int s5p6442_clk_ip3_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
}
static struct clksrc_clk clksrcs[] = {
{
.clk = {
.name = "dout_a2m",
.id = -1,
.parent = &clk_mout_apll.clk,
},
.sources = &clk_src_apll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 },
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 4, .size = 3 },
}, {
.clk = {
.name = "dout_apll",
.id = -1,
.parent = &clk_mout_arm.clk,
},
.sources = &clk_src_arm,
.reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 16, .size = 3 },
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 0, .size = 3 },
}, {
.clk = {
.name = "hclkd1",
.id = -1,
.parent = &clk_mout_d1sync.clk,
},
.sources = &clk_src_d1sync,
.reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 24, .size = 3 },
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 24, .size = 4 },
}, {
.clk = {
.name = "hclkd0",
.id = -1,
.parent = &clk_mout_d0sync.clk,
},
.sources = &clk_src_d0sync,
.reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 28, .size = 3 },
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 16, .size = 4 },
}, {
.clk = {
.name = "pclkd0",
.id = -1,
.parent = &clk_hclkd0,
},
.sources = &clk_src_d0sync,
.reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 28, .size = 3 },
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 20, .size = 3 },
}, {
.clk = {
.name = "pclkd1",
.id = -1,
.parent = &clk_hclkd1,
},
.sources = &clk_src_d1sync,
.reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 24, .size = 3 },
.reg_div = { .reg = S5P_CLK_DIV0, .shift = 28, .size = 3 },
}
};
/* Clock initialisation code */
static struct clksrc_clk *init_parents[] = {
&clk_mout_apll,
&clk_mout_mpll,
&clk_mout_epll,
&clk_mout_arm,
&clk_mout_d0,
&clk_mout_d0sync,
&clk_mout_d1,
&clk_mout_d1sync,
};
void __init_or_cpufreq s5p6442_setup_clocks(void)
{
struct clk *pclkd0_clk;
struct clk *pclkd1_clk;
unsigned long xtal;
unsigned long arm;
unsigned long hclkd0 = 0;
unsigned long hclkd1 = 0;
unsigned long pclkd0 = 0;
unsigned long pclkd1 = 0;
unsigned long apll;
unsigned long mpll;
unsigned long epll;
unsigned int ptr;
printk(KERN_DEBUG "%s: registering clocks\n", __func__);
xtal = clk_get_rate(&clk_xtal);
printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508);
mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500);
printk(KERN_INFO "S5P6442: PLL settings, A=%ld, M=%ld, E=%ld",
apll, mpll, epll);
clk_fout_apll.rate = apll;
clk_fout_mpll.rate = mpll;
clk_fout_epll.rate = epll;
for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
s3c_set_clksrc(init_parents[ptr], true);
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
s3c_set_clksrc(&clksrcs[ptr], true);
arm = clk_get_rate(&clk_dout_apll);
hclkd0 = clk_get_rate(&clk_hclkd0);
hclkd1 = clk_get_rate(&clk_hclkd1);
pclkd0_clk = clk_get(NULL, "pclkd0");
BUG_ON(IS_ERR(pclkd0_clk));
pclkd0 = clk_get_rate(pclkd0_clk);
clk_put(pclkd0_clk);
pclkd1_clk = clk_get(NULL, "pclkd1");
BUG_ON(IS_ERR(pclkd1_clk));
pclkd1 = clk_get_rate(pclkd1_clk);
clk_put(pclkd1_clk);
printk(KERN_INFO "S5P6442: HCLKD0=%ld, HCLKD1=%ld, PCLKD0=%ld, PCLKD1=%ld\n",
hclkd0, hclkd1, pclkd0, pclkd1);
/* For backward compatibility */
clk_f.rate = arm;
clk_h.rate = hclkd1;
clk_p.rate = pclkd1;
clk_pclkd0.rate = pclkd0;
clk_pclkd1.rate = pclkd1;
}
static struct clk init_clocks[] = {
{
.name = "systimer",
.id = -1,
.parent = &clk_pclkd1,
.enable = s5p6442_clk_ip3_ctrl,
.ctrlbit = (1<<16),
}, {
.name = "uart",
.id = 0,
.parent = &clk_pclkd1,
.enable = s5p6442_clk_ip3_ctrl,
.ctrlbit = (1<<17),
}, {
.name = "uart",
.id = 1,
.parent = &clk_pclkd1,
.enable = s5p6442_clk_ip3_ctrl,
.ctrlbit = (1<<18),
}, {
.name = "uart",
.id = 2,
.parent = &clk_pclkd1,
.enable = s5p6442_clk_ip3_ctrl,
.ctrlbit = (1<<19),
}, {
.name = "watchdog",
.id = -1,
.parent = &clk_pclkd1,
.enable = s5p6442_clk_ip3_ctrl,
.ctrlbit = (1 << 22),
}, {
.name = "timers",
.id = -1,
.parent = &clk_pclkd1,
.enable = s5p6442_clk_ip3_ctrl,
.ctrlbit = (1<<23),
},
};
static struct clk *clks[] __initdata = {
&clk_ext,
&clk_epll,
&clk_mout_apll.clk,
&clk_mout_mpll.clk,
&clk_mout_epll.clk,
&clk_mout_d0.clk,
&clk_mout_d0sync.clk,
&clk_mout_d1.clk,
&clk_mout_d1sync.clk,
&clk_hclkd0,
&clk_pclkd0,
&clk_hclkd1,
&clk_pclkd1,
};
void __init s5p6442_register_clocks(void)
{
s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
s3c_pwmclk_init();
}
