172 lines
4.0 KiB
C
172 lines
4.0 KiB
C
/* linux/arch/arm/mach-s3c2416/clock.c
|
|
*
|
|
* Copyright (c) 2010 Simtec Electronics
|
|
* Copyright (c) 2010 Ben Dooks <ben-linux@fluff.org>
|
|
*
|
|
* S3C2416 Clock control support
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include <plat/clock.h>
|
|
#include <plat/clock-clksrc.h>
|
|
#include <plat/cpu.h>
|
|
|
|
#include <plat/cpu-freq.h>
|
|
#include <plat/pll.h>
|
|
|
|
#include <asm/mach/map.h>
|
|
|
|
#include <mach/regs-clock.h>
|
|
#include <mach/regs-s3c2443-clock.h>
|
|
|
|
/* armdiv
|
|
*
|
|
* this clock is sourced from msysclk and can have a number of
|
|
* divider values applied to it to then be fed into armclk.
|
|
* The real clock definition is done in s3c2443-clock.c,
|
|
* only the armdiv divisor table must be defined here.
|
|
*/
|
|
|
|
static unsigned int armdiv[8] = {
|
|
[0] = 1,
|
|
[1] = 2,
|
|
[2] = 3,
|
|
[3] = 4,
|
|
[5] = 6,
|
|
[7] = 8,
|
|
};
|
|
|
|
static struct clksrc_clk hsspi_eplldiv = {
|
|
.clk = {
|
|
.name = "hsspi-eplldiv",
|
|
.parent = &clk_esysclk.clk,
|
|
.ctrlbit = (1 << 14),
|
|
.enable = s3c2443_clkcon_enable_s,
|
|
},
|
|
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 24 },
|
|
};
|
|
|
|
static struct clk *hsspi_sources[] = {
|
|
[0] = &hsspi_eplldiv.clk,
|
|
[1] = NULL, /* to fix */
|
|
};
|
|
|
|
static struct clksrc_clk hsspi_mux = {
|
|
.clk = {
|
|
.name = "hsspi-if",
|
|
},
|
|
.sources = &(struct clksrc_sources) {
|
|
.sources = hsspi_sources,
|
|
.nr_sources = ARRAY_SIZE(hsspi_sources),
|
|
},
|
|
.reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 18 },
|
|
};
|
|
|
|
static struct clksrc_clk hsmmc_div[] = {
|
|
[0] = {
|
|
.clk = {
|
|
.name = "hsmmc-div",
|
|
.devname = "s3c-sdhci.0",
|
|
.parent = &clk_esysclk.clk,
|
|
},
|
|
.reg_div = { .reg = S3C2416_CLKDIV2, .size = 2, .shift = 6 },
|
|
},
|
|
[1] = {
|
|
.clk = {
|
|
.name = "hsmmc-div",
|
|
.devname = "s3c-sdhci.1",
|
|
.parent = &clk_esysclk.clk,
|
|
},
|
|
.reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 6 },
|
|
},
|
|
};
|
|
|
|
static struct clksrc_clk hsmmc_mux0 = {
|
|
.clk = {
|
|
.name = "hsmmc-if",
|
|
.devname = "s3c-sdhci.0",
|
|
.ctrlbit = (1 << 6),
|
|
.enable = s3c2443_clkcon_enable_s,
|
|
},
|
|
.sources = &(struct clksrc_sources) {
|
|
.nr_sources = 2,
|
|
.sources = (struct clk * []) {
|
|
[0] = &hsmmc_div[0].clk,
|
|
[1] = NULL, /* to fix */
|
|
},
|
|
},
|
|
.reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 16 },
|
|
};
|
|
|
|
static struct clksrc_clk hsmmc_mux1 = {
|
|
.clk = {
|
|
.name = "hsmmc-if",
|
|
.devname = "s3c-sdhci.1",
|
|
.ctrlbit = (1 << 12),
|
|
.enable = s3c2443_clkcon_enable_s,
|
|
},
|
|
.sources = &(struct clksrc_sources) {
|
|
.nr_sources = 2,
|
|
.sources = (struct clk * []) {
|
|
[0] = &hsmmc_div[1].clk,
|
|
[1] = NULL, /* to fix */
|
|
},
|
|
},
|
|
.reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 17 },
|
|
};
|
|
|
|
static struct clk hsmmc0_clk = {
|
|
.name = "hsmmc",
|
|
.devname = "s3c-sdhci.0",
|
|
.parent = &clk_h,
|
|
.enable = s3c2443_clkcon_enable_h,
|
|
.ctrlbit = S3C2416_HCLKCON_HSMMC0,
|
|
};
|
|
|
|
static struct clksrc_clk *clksrcs[] __initdata = {
|
|
&hsspi_eplldiv,
|
|
&hsspi_mux,
|
|
&hsmmc_div[0],
|
|
&hsmmc_div[1],
|
|
&hsmmc_mux0,
|
|
&hsmmc_mux1,
|
|
};
|
|
|
|
static struct clk_lookup s3c2416_clk_lookup[] = {
|
|
CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.0", &hsmmc0_clk),
|
|
CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.2", &hsmmc_mux0.clk),
|
|
CLKDEV_INIT("s3c-sdhci.1", "mmc_busclk.2", &hsmmc_mux1.clk),
|
|
/* s3c2443-spi.0 is used on s3c2416 and s3c2450 as well */
|
|
CLKDEV_INIT("s3c2443-spi.0", "spi_busclk2", &hsspi_mux.clk),
|
|
};
|
|
|
|
void __init s3c2416_init_clocks(int xtal)
|
|
{
|
|
u32 epllcon = __raw_readl(S3C2443_EPLLCON);
|
|
u32 epllcon1 = __raw_readl(S3C2443_EPLLCON+4);
|
|
int ptr;
|
|
|
|
/* s3c2416 EPLL compatible with s3c64xx */
|
|
clk_epll.rate = s3c_get_pll6553x(xtal, epllcon, epllcon1);
|
|
|
|
clk_epll.parent = &clk_epllref.clk;
|
|
|
|
s3c2443_common_init_clocks(xtal, s3c2416_get_pll,
|
|
armdiv, ARRAY_SIZE(armdiv),
|
|
S3C2416_CLKDIV0_ARMDIV_MASK);
|
|
|
|
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
|
|
s3c_register_clksrc(clksrcs[ptr], 1);
|
|
|
|
s3c24xx_register_clock(&hsmmc0_clk);
|
|
clkdev_add_table(s3c2416_clk_lookup, ARRAY_SIZE(s3c2416_clk_lookup));
|
|
|
|
}
|