/* linux/arch/arm/mach-s5p64x0/clock-s5p6440.c
*
*
*
*
* S5P6440 - 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/errno.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/map.h>
#include <mach/regs-clock.h>
#include <mach/s5p64x0-clock.h>
#include <plat/cpu-freq.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/s5p6440.h>
static u32 epll_div[][5] = {
{ 36000000, 0, 48, 1, 4 },
{ 48000000, 0, 32, 1, 3 },
{ 60000000, 0, 40, 1, 3 },
{ 72000000, 0, 48, 1, 3 },
{ 84000000, 0, 28, 1, 2 },
{ 96000000, 0, 32, 1, 2 },
{ 32768000, 45264, 43, 1, 4 },
{ 45158000, 6903, 30, 1, 3 },
{ 49152000, 50332, 32, 1, 3 },
{ 67738000, 10398, 45, 1, 3 },
{ 73728000, 9961, 49, 1, 3 }
};
static int s5p6440_epll_set_rate(struct clk *clk, unsigned long rate)
{
unsigned int epll_con, epll_con_k;
unsigned int i;
if (clk->rate == rate) /* Return if nothing changed */
return 0;
epll_con = __raw_readl(S5P64X0_EPLL_CON);
epll_con_k = __raw_readl(S5P64X0_EPLL_CON_K);
epll_con_k &= ~(PLL90XX_KDIV_MASK);
epll_con &= ~(PLL90XX_MDIV_MASK | PLL90XX_PDIV_MASK | PLL90XX_SDIV_MASK);
for (i = 0; i < ARRAY_SIZE(epll_div); i++) {
if (epll_div[i][0] == rate) {
epll_con_k |= (epll_div[i][1] << PLL90XX_KDIV_SHIFT);
epll_con |= (epll_div[i][2] << PLL90XX_MDIV_SHIFT) |
(epll_div[i][3] << PLL90XX_PDIV_SHIFT) |
(epll_div[i][4] << PLL90XX_SDIV_SHIFT);
break;
}
}
if (i == ARRAY_SIZE(epll_div)) {
printk(KERN_ERR "%s: Invalid Clock EPLL Frequency\n", __func__);
return -EINVAL;
}
__raw_writel(epll_con, S5P64X0_EPLL_CON);
__raw_writel(epll_con_k, S5P64X0_EPLL_CON_K);
printk(KERN_WARNING "EPLL Rate changes from %lu to %lu\n",
clk->rate, rate);
clk->rate = rate;
return 0;
}
static struct clk_ops s5p6440_epll_ops = {
.get_rate = s5p_epll_get_rate,
.set_rate = s5p6440_epll_set_rate,
};
static struct clksrc_clk clk_hclk = {
.clk = {
.name = "clk_hclk",
.id = -1,
.parent = &clk_armclk.clk,
},
.reg_div = { .reg = S5P64X0_CLK_DIV0, .shift = 8, .size = 4 },
};
static struct clksrc_clk clk_pclk = {
.clk = {
.name = "clk_pclk",
.id = -1,
.parent = &clk_hclk.clk,
},
.reg_div = { .reg = S5P64X0_CLK_DIV0, .shift = 12, .size = 4 },
};
static struct clksrc_clk clk_hclk_low = {
.clk = {
.name = "clk_hclk_low",
.id = -1,
},
.sources = &clkset_hclk_low,
.reg_src = { .reg = S5P64X0_SYS_OTHERS, .shift = 6, .size = 1 },
.reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 8, .size = 4 },
};
static struct clksrc_clk clk_pclk_low = {
.clk = {
.name = "clk_pclk_low",
.id = -1,
.parent = &clk_hclk_low.clk,
},
.reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 12, .size = 4 },
};
/*
* The following clocks will be disabled during clock initialization. It is
* recommended to keep the following clocks disabled until the driver requests
* for enabling the clock.
*/
static struct clk init_clocks_off[] = {
{
.name = "nand",
.id = -1,
.parent = &clk_hclk.clk,
.enable = s5p64x0_mem_ctrl,
.ctrlbit = (1 << 2),
}, {
.name = "post",
.id = -1,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 5)
}, {
.name = "2d",
.id = -1,
.parent = &clk_hclk.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 8),
}, {
.name = "pdma",
.id = -1,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 12),
}, {
.name = "hsmmc",
.id = 0,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 17),
}, {
.name = "hsmmc",
.id = 1,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 18),
}, {
.name = "hsmmc",
.id = 2,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 19),
}, {
.name = "otg",
.id = -1,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 20)
}, {
.name = "irom",
.id = -1,
.parent = &clk_hclk.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 25),
}, {
.name = "lcd",
.id = -1,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk1_ctrl,
.ctrlbit = (1 << 1),
}, {
.name = "hclk_fimgvg",
.id = -1,
.parent = &clk_hclk.clk,
.enable = s5p64x0_hclk1_ctrl,
.ctrlbit = (1 << 2),
}, {
.name = "tsi",
.id = -1,
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk1_ctrl,
.ctrlbit = (1 << 0),
}, {
.name = "watchdog",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 5),
}, {
.name = "rtc",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 6),
}, {
.name = "timers",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 7),
}, {
.name = "pcm",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 8),
}, {
.name = "adc",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 12),
}, {
.name = "i2c",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 17),
}, {
.name = "spi",
.id = 0,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 21),
}, {
.name = "spi",
.id = 1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 22),
}, {
.name = "gps",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 25),
}, {
.name = "iis",
.id = 0,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 26),
}, {
.name = "dsim",
.id = -1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 28),
}, {
.name = "etm",
.id = -1,
.parent = &clk_pclk.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 29),
}, {
.name = "dmc0",
.id = -1,
.parent = &clk_pclk.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 30),
}, {
.name = "pclk_fimgvg",
.id = -1,
.parent = &clk_pclk.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 31),
}, {
.name = "sclk_spi_48",
.id = 0,
.parent = &clk_48m,
.enable = s5p64x0_sclk_ctrl,
.ctrlbit = (1 << 22),
}, {
.name = "sclk_spi_48",
.id = 1,
.parent = &clk_48m,
.enable = s5p64x0_sclk_ctrl,
.ctrlbit = (1 << 23),
}, {
.name = "mmc_48m",
.id = 0,
.parent = &clk_48m,
.enable = s5p64x0_sclk_ctrl,
.ctrlbit = (1 << 27),
}, {
.name = "mmc_48m",
.id = 1,
.parent = &clk_48m,
.enable = s5p64x0_sclk_ctrl,
.ctrlbit = (1 << 28),
}, {
.name = "mmc_48m",
.id = 2,
.parent = &clk_48m,
.enable = s5p64x0_sclk_ctrl,
.ctrlbit = (1 << 29),
},
};
/*
* The following clocks will be enabled during clock initialization.
*/
static struct clk init_clocks[] = {
{
.name = "intc",
.id = -1,
.parent = &clk_hclk.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 1),
}, {
.name = "mem",
.id = -1,
.parent = &clk_hclk.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 21),
}, {
.name = "uart",
.id = 0,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 1),
}, {
.name = "uart",
.id = 1,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 2),
}, {
.name = "uart",
.id = 2,
.parent = &clk_pclk_low.clk,
.enable = s5p64x0_pclk_ctrl,
.ctrlbit = (1 << 3),
}, {
.name = "uart",
.id = 3,
.parent = &clk_pclk_l
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