- 根目录:
- arch
- arm
- mach-shmobile
- clock-r8a7779.c
/*
* r8a7779 clock framework support
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 Magnus Damm
*
* 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
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/sh_clk.h>
#include <linux/clkdev.h>
#include <linux/sh_timer.h>
#include "clock.h"
#include "common.h"
#include "r8a7779.h"
/*
* MD1 = 1 MD1 = 0
* (PLLA = 1500) (PLLA = 1600)
* (MHz) (MHz)
*------------------------------------------------+--------------------
* clkz 1000 (2/3) 800 (1/2)
* clkzs 250 (1/6) 200 (1/8)
* clki 750 (1/2) 800 (1/2)
* clks 250 (1/6) 200 (1/8)
* clks1 125 (1/12) 100 (1/16)
* clks3 187.5 (1/8) 200 (1/8)
* clks4 93.7 (1/16) 100 (1/16)
* clkp 62.5 (1/24) 50 (1/32)
* clkg 62.5 (1/24) 66.6 (1/24)
* clkb, CLKOUT
* (MD2 = 0) 62.5 (1/24) 66.6 (1/24)
* (MD2 = 1) 41.6 (1/36) 50 (1/32)
*/
#define MD(nr) BIT(nr)
#define MSTPCR0 IOMEM(0xffc80030)
#define MSTPCR1 IOMEM(0xffc80034)
#define MSTPCR3 IOMEM(0xffc8003c)
#define MSTPSR1 IOMEM(0xffc80044)
/* ioremap() through clock mapping mandatory to avoid
* collision with ARM coherent DMA virtual memory range.
*/
static struct clk_mapping cpg_mapping = {
.phys = 0xffc80000,
.len = 0x80,
};
/*
* Default rate for the root input clock, reset this with clk_set_rate()
* from the platform code.
*/
static struct clk plla_clk = {
/* .rate will be updated on r8a7779_clock_init() */
.mapping = &cpg_mapping,
};
/*
* clock ratio of these clock will be updated
* on r8a7779_clock_init()
*/
SH_FIXED_RATIO_CLK_SET(clkz_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clkzs_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clki_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clks_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clks1_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clks3_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clks4_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clkb_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clkout_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clkp_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(clkg_clk, plla_clk, 1, 1);
static struct clk *main_clks[] = {
&plla_clk,
&clkz_clk,
&clkzs_clk,
&clki_clk,
&clks_clk,
&clks1_clk,
&clks3_clk,
&clks4_clk,
&clkb_clk,
&clkout_clk,
&clkp_clk,
&clkg_clk,
};
enum { MSTP323, MSTP322, MSTP321, MSTP320,
MSTP120,
MSTP116, MSTP115, MSTP114,
MSTP110, MSTP109, MSTP108,
MSTP103, MSTP101, MSTP100,
MSTP030,
MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
MSTP016, MSTP015, MSTP014,
MSTP007,
MSTP_NR };
static struct clk mstp_clks[MSTP_NR] = {
[MSTP323] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 23, 0), /* SDHI0 */
[MSTP322] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 22, 0), /* SDHI1 */
[MSTP321] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 21, 0), /* SDHI2 */
[MSTP320] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 20, 0), /* SDHI3 */
[MSTP120] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 20, MSTPSR1, 0), /* VIN3 */
[MSTP116] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 16, MSTPSR1, 0), /* PCIe */
[MSTP115] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 15, MSTPSR1, 0), /* SATA */
[MSTP114] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 14, MSTPSR1, 0), /* Ether */
[MSTP110] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 10, MSTPSR1, 0), /* VIN0 */
[MSTP109] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 9, MSTPSR1, 0), /* VIN1 */
[MSTP108] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 8, MSTPSR1, 0), /* VIN2 */
[MSTP103] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 3, MSTPSR1, 0), /* DU */
[MSTP101] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 1, MSTPSR1, 0), /* USB2 */
[MSTP100] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 0, MSTPSR1, 0), /* USB0/1 */
[MSTP030] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 30, 0), /* I2C0 */
[MSTP029] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 29, 0), /* I2C1 */
[MSTP028] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 28, 0), /* I2C2 */
[MSTP027] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 27, 0), /* I2C3 */
[MSTP026] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 26, 0), /* SCIF0 */
[MSTP025] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 25, 0), /* SCIF1 */
[MSTP024] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 24, 0), /* SCIF2 */
[MSTP023] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 23, 0), /* SCIF3 */
[MSTP022] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 22, 0), /* SCIF4 */
[MSTP021] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 21, 0), /* SCIF5 */
[MSTP016] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 16, 0), /* TMU0 */
[MSTP015] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 15, 0), /* TMU1 */
[MSTP014] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 14, 0), /* TMU2 */
[MSTP007] = SH_CLK_MSTP32(&clks_clk, MSTPCR0, 7, 0), /* HSPI */
};
static struct clk_lookup lookups[] = {
/* main clocks */
CLKDEV_CON_ID("plla_clk", &plla_clk),
CLKDEV_CON_ID("clkz_clk", &clkz_clk),
CLKDEV_CON_ID("clkzs_clk", &clkzs_clk),
/* DIV4 clocks */
CLKDEV_CON_ID("shyway_clk", &clks_clk),
CLKDEV_CON_ID("bus_clk", &clkout_clk),
CLKDEV_CON_ID("shyway4_clk", &clks4_clk),
CLKDEV_CON_ID("shyway3_clk", &clks3_clk),
CLKDEV_CON_ID("shyway1_clk", &clks1_clk),
CLKDEV_CON_ID("peripheral_clk", &clkp_clk),
/* MSTP32 clocks */
CLKDEV_DEV_ID("r8a7779-vin.3", &mstp_clks[MSTP120]), /* VIN3 */
CLKDEV_DEV_ID("rcar-pcie", &mstp_clks[MSTP116]), /* PCIe */
CLKDEV_DEV_ID("sata_rcar", &mstp_clks[MSTP115]), /* SATA */
CLKDEV_DEV_ID("fc600000.sata", &mstp_clks[MSTP115]), /* SATA w/DT */
CLKDEV_DEV_ID("r8a777x-ether", &mstp_clks[MSTP114]), /* Ether */
CLKDEV_DEV_ID("r8a7779-vin.0", &mstp_clks[MSTP110]), /* VIN0 */
CLKDEV_DEV_ID("r8a7779-vin.1", &mstp_clks[MSTP109]), /* VIN1 */
CLKDEV_DEV_ID("r8a7779-vin.2", &mstp_clks[MSTP108]), /* VIN2 */
CLKDEV_DEV_ID("ehci-platform.1", &mstp_clks[MSTP101]), /* USB EHCI port2 */
CLKDEV_DEV_ID("ohci-platform.1", &mstp_clks[MSTP101]), /* USB OHCI port2 */
CLKDEV_DEV_ID("ehci-platform.0", &mstp_clks[MSTP100]), /* USB EHCI port0/1 */
CLKDEV_DEV_ID("ohci-platform.0", &mstp_clks[MSTP100]), /* USB OHCI port0/1 */
CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]), /* TMU0 */
CLKDEV_DEV_ID("i2c-rcar.0", &mstp_clks[MSTP030]), /* I2C0 */
CLKDEV_DEV_ID("ffc70000.i2c", &mstp_clks[MSTP030]), /* I2C0 */
CLKDEV_DEV_ID("i2c-rcar.1", &mstp_clks[MSTP029]), /* I2C1 */
CLKDEV_DEV_ID("ffc71000.i2c", &mstp_clks[MSTP029]), /* I2C1 */
CLKDEV_DEV_ID("i2c-rcar.2", &mstp_clks[MSTP028]), /* I2C2 */
CLKDEV_DEV_ID("ffc72000.i2c", &mstp_clks[MSTP028]), /* I2C2 */
CLKDEV_DEV_ID("i2c-rcar.3", &mstp_clks[MSTP027]), /* I2C3 */
CLKDEV_DEV_ID("ffc73000.i2c", &mstp_clks[MSTP027]), /* I2C3 */
CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */
CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */
CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */
CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP023]), /* SCIF3 */
CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP022]), /* SCIF4 */
CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP021]), /* SCIF6 */
CLKDEV_DEV_ID("sh-hspi.0", &mstp_clks[MSTP007]), /* HSPI0 */
CLKDEV_DEV_ID("fffc7000.spi", &mstp_clks[MSTP007]), /* HSPI0 */
CLKDEV_DEV_ID("sh-hspi.1", &mstp_clks[MSTP007]), /* HSPI1 */
CLKDEV_DEV_ID("fffc8000.spi", &mstp_clks[MSTP007]), /* HSPI1 */
CLKDEV_DEV_ID("sh-hspi.2", &mstp_clks[MSTP007]), /* HSPI2 */
CLKDEV_DEV_ID("fffc6000.spi", &mstp_clks[MSTP007]), /* HSPI2 */
CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP323]), /* SDHI0 */
CLKDEV_DEV_ID("ffe4c000.sd", &mstp_clks[MSTP323]), /* SDHI0 */
CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP322]), /* SDHI1 */
CLKDEV_DEV_ID("ffe4d000.sd", &mstp_clks[MSTP322]), /* SDHI1 */
CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP321]), /* SDHI2 */
CLKDEV_DEV_ID("ffe4e000.sd", &mstp_clks[MSTP321]), /* SDHI2 */
CLKDEV_DEV_ID("sh_mobile_sdhi.3", &mstp_clks[MSTP320]), /* SDHI3 */
CLKDEV_DEV_ID("ffe4f000.sd", &mstp_clks[MSTP320]), /* SDHI3 */
CLKDEV_DEV_ID("rcar-du-r8a7779", &mstp_clks[MSTP103]), /* DU */
};
void __init r8a7779_clock_init(void)
{
u32 mode = r8a7779_read_mode_pins();
int k, ret = 0;
if (mode & MD(1)) {
plla_clk.rate = 1500000000;
SH_CLK_SET_RATIO(&clkz_clk_ratio, 2, 3);
SH_CLK_SET_RATIO(&clkzs_clk_ratio, 1, 6);
SH_CLK_SET_RATIO(&clki_clk_ratio, 1, 2);
SH_CLK_SET_RATIO(&clks_clk_ratio, 1, 6);
SH_CLK_SET_RATIO(&clks1_clk_ratio, 1, 12);
SH_CLK_SET_RATIO(&clks3_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&clks4_clk_ratio, 1, 16);
SH_CLK_SET_RATIO(&clkp_clk_ratio, 1, 24);
SH_CLK_SET_RATIO(&clkg_clk_ratio, 1, 24);
if (mode & MD(2)) {
SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 36);
SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 36);
} else {
SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 24);
SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 24);
}
} else {
plla_clk.rate = 1600000000;
SH_CLK_SET_RATIO(&clkz_clk_ratio, 1, 2);
SH_CLK_SET_RATIO(&clkzs_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&clki_clk_ratio, 1, 2);
SH_CLK_SET_RATIO(&clks_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&clks1_clk_ratio, 1, 16);
SH_CLK_SET_RATIO(&clks3_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&clks4_clk_ratio, 1, 16);
SH_CLK_SET_RATIO(&clkp_clk_ratio, 1, 32);
SH_CLK_SET_RATIO(&clkg_clk_ratio, 1, 24);
if (mode & MD(2)) {
SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 32);
SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 32);
} else {
SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 24);
SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 24);
}
}
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]);
if (!ret)
ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
if (!ret)
shmobile_clk_init();
else
panic("failed to setup r8a7779 clocks\n");
}
/* do nothing for !CONFIG_SMP or !CONFIG_HAVE_TWD */
void __init __weak r8a7779_register_twd(void) { }
void __init r8a7779_earlytimer_init(void)
{
r8a7779_clock_init();
r8a7779_register_twd();
shmobile_earlytimer_init();
}