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alistair23-linux/arch/arm/mach-shmobile/clock-r8a7779.c
Laurent Pinchart 335204dfb8 ARM: shmobile: Remove FSF address from copyright headers 
The information is already included in the COPYING file in the kernel
sources root directory, we don't want to modify all source files when
the FSF will move to a new address, and I'm tired of seeing the related
checkpatch.pl warnings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2014-10-27 09:48:07 +09:00

272 lines
10 KiB
C
Raw Blame History

/*
* 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.
*/
#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();
}
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