- 根目录:
- arch
- arm
- mach-shmobile
- clock-r8a7791.c
/*
* r8a7791 clock framework support
*
* Copyright (C) 2013 Renesas Electronics Corporation
* Copyright (C) 2013 Renesas Solutions Corp.
* Copyright (C) 2013 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; 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/sh_clk.h>
#include <linux/clkdev.h>
#include "clock.h"
#include "common.h"
#include "rcar-gen2.h"
/*
* MD EXTAL PLL0 PLL1 PLL3
* 14 13 19 (MHz) *1 *1
*---------------------------------------------------
* 0 0 0 15 x 1 x172/2 x208/2 x106
* 0 0 1 15 x 1 x172/2 x208/2 x88
* 0 1 0 20 x 1 x130/2 x156/2 x80
* 0 1 1 20 x 1 x130/2 x156/2 x66
* 1 0 0 26 / 2 x200/2 x240/2 x122
* 1 0 1 26 / 2 x200/2 x240/2 x102
* 1 1 0 30 / 2 x172/2 x208/2 x106
* 1 1 1 30 / 2 x172/2 x208/2 x88
*
* *1 : Table 7.6 indicates VCO ouput (PLLx = VCO/2)
* see "p1 / 2" on R8A7791_CLOCK_ROOT() below
*/
#define CPG_BASE 0xe6150000
#define CPG_LEN 0x1000
#define SMSTPCR0 0xE6150130
#define SMSTPCR1 0xE6150134
#define SMSTPCR2 0xe6150138
#define SMSTPCR3 0xE615013C
#define SMSTPCR5 0xE6150144
#define SMSTPCR7 0xe615014c
#define SMSTPCR8 0xE6150990
#define SMSTPCR9 0xE6150994
#define SMSTPCR10 0xE6150998
#define SMSTPCR11 0xE615099C
#define MSTPSR1 IOMEM(0xe6150038)
#define MSTPSR2 IOMEM(0xe6150040)
#define MSTPSR3 IOMEM(0xe6150048)
#define MSTPSR5 IOMEM(0xe615003c)
#define MSTPSR7 IOMEM(0xe61501c4)
#define MSTPSR8 IOMEM(0xe61509a0)
#define MSTPSR9 IOMEM(0xe61509a4)
#define MSTPSR11 IOMEM(0xe61509ac)
#define SDCKCR 0xE6150074
#define SD1CKCR 0xE6150078
#define SD2CKCR 0xE615026c
#define MMC0CKCR 0xE6150240
#define MMC1CKCR 0xE6150244
#define SSPCKCR 0xE6150248
#define SSPRSCKCR 0xE615024C
static struct clk_mapping cpg_mapping = {
.phys = CPG_BASE,
.len = CPG_LEN,
};
static struct clk extal_clk = {
/* .rate will be updated on r8a7791_clock_init() */
.mapping = &cpg_mapping,
};
static struct sh_clk_ops followparent_clk_ops = {
.recalc = followparent_recalc,
};
static struct clk main_clk = {
/* .parent will be set r8a73a4_clock_init */
.ops = &followparent_clk_ops,
};
/*
* clock ratio of these clock will be updated
* on r8a7791_clock_init()
*/
SH_FIXED_RATIO_CLK_SET(pll1_clk, main_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(pll3_clk, main_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(qspi_clk, pll1_clk, 1, 1);
/* fixed ratio clock */
SH_FIXED_RATIO_CLK_SET(extal_div2_clk, extal_clk, 1, 2);
SH_FIXED_RATIO_CLK_SET(cp_clk, extal_clk, 1, 2);
SH_FIXED_RATIO_CLK_SET(pll1_div2_clk, pll1_clk, 1, 2);
SH_FIXED_RATIO_CLK_SET(hp_clk, pll1_clk, 1, 12);
SH_FIXED_RATIO_CLK_SET(p_clk, pll1_clk, 1, 24);
SH_FIXED_RATIO_CLK_SET(rclk_clk, pll1_clk, 1, (48 * 1024));
SH_FIXED_RATIO_CLK_SET(mp_clk, pll1_div2_clk, 1, 15);
SH_FIXED_RATIO_CLK_SET(zg_clk, pll1_clk, 1, 3);
SH_FIXED_RATIO_CLK_SET(zx_clk, pll1_clk, 1, 3);
SH_FIXED_RATIO_CLK_SET(zs_clk, pll1_clk, 1, 6);
static struct clk *main_clks[] = {
&extal_clk,
&extal_div2_clk,
&main_clk,
&pll1_clk,
&pll1_div2_clk,
&pll3_clk,
&hp_clk,
&p_clk,
&qspi_clk,
&rclk_clk,
&mp_clk,
&cp_clk,
&zg_clk,
&zx_clk,
&zs_clk,
};
/* SDHI (DIV4) clock */
static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, 24, 0, 36, 48, 10 };
static struct clk_div_mult_table div4_div_mult_table = {
.divisors = divisors,
.nr_divisors = ARRAY_SIZE(divisors),
};
static struct clk_div4_table div4_table = {
.div_mult_table = &div4_div_mult_table,
};
enum {
DIV4_SDH, DIV4_SD0,
DIV4_NR
};
static struct clk div4_clks[DIV4_NR] = {
[DIV4_SDH] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 8, 0x0dff, CLK_ENABLE_ON_INIT),
[DIV4_SD0] = SH_CLK_DIV4(&pll1_clk, SDCKCR, 4, 0x1df0, CLK_ENABLE_ON_INIT),
};
/* DIV6 clocks */
enum {
DIV6_SD1, DIV6_SD2,
DIV6_NR
};
static struct clk div6_clks[DIV6_NR] = {
[DIV6_SD1] = SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0),
[DIV6_SD2] = SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0),
};
/* MSTP */
enum {
MSTP1108, MSTP1107, MSTP1106,
MSTP931, MSTP930, MSTP929, MSTP928, MSTP927, MSTP925,
MSTP917,
MSTP815, MSTP814,
MSTP813,
MSTP811, MSTP810, MSTP809,
MSTP726, MSTP724, MSTP723, MSTP721, MSTP720,
MSTP719, MSTP718, MSTP715, MSTP714,
MSTP522,
MSTP314, MSTP312, MSTP311,
MSTP216, MSTP207, MSTP206,
MSTP204, MSTP203, MSTP202,
MSTP124,
MSTP_NR
};
static struct clk mstp_clks[MSTP_NR] = {
[MSTP1108] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR11, 8, MSTPSR11, 0), /* SCIFA5 */
[MSTP1107] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR11, 7, MSTPSR11, 0), /* SCIFA4 */
[MSTP1106] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR11, 6, MSTPSR11, 0), /* SCIFA3 */
[MSTP931] = SH_CLK_MSTP32_STS(&hp_clk, SMSTPCR9, 31, MSTPSR9, 0), /* I2C0 */
[MSTP930] = SH_CLK_MSTP32_STS(&hp_clk, SMSTPCR9, 30, MSTPSR9, 0), /* I2C1 */
[MSTP929] = SH_CLK_MSTP32_STS(&hp_clk, SMSTPCR9, 29, MSTPSR9, 0), /* I2C2 */
[MSTP928] = SH_CLK_MSTP32_STS(&hp_clk, SMSTPCR9, 28, MSTPSR9, 0), /* I2C3 */
[MSTP927] = SH_CLK_MSTP32_STS(&hp_clk, SMSTPCR9, 27, MSTPSR9, 0), /* I2C4 */
[MSTP925] = SH_CLK_MSTP32_STS(&hp_clk, SMSTPCR9, 25, MSTPSR9, 0), /* I2C5 */
[MSTP917] = SH_CLK_MSTP32_STS(&qspi_clk, SMSTPCR9, 17, MSTPSR9, 0), /* QSPI */
[MSTP815] = SH_CLK_MSTP32_STS(&zs_clk, SMSTPCR8, 15, MSTPSR8, 0), /* SATA0 */
[MSTP814] = SH_CLK_MSTP32_STS(&zs_clk, SMSTPCR8, 14, MSTPSR8, 0), /* SATA1 */
[MSTP813] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR8, 13, MSTPSR8, 0), /* Ether */
[MSTP811] = SH_CLK_MSTP32_STS(&zg_clk, SMSTPCR8, 11, MSTPSR8, 0), /* VIN0 */
[MSTP810] = SH_CLK_MSTP32_STS(&zg_clk, SMSTPCR8, 10, MSTPSR8, 0), /* VIN1 */
[MSTP809] = SH_CLK_MSTP32_STS(&zg_clk, SMSTPCR8, 9, MSTPSR8, 0), /* VIN2 */
[MSTP726] = SH_CLK_MSTP32_STS(&zx_clk, SMSTPCR7, 26, MSTPSR7, 0), /* LVDS0 */
[MSTP724] = SH_CLK_MSTP32_STS(&zx_clk, SMSTPCR7, 24, MSTPSR7, 0), /* DU0 */
[MSTP723] = SH_CLK_MSTP32_STS(&zx_clk, SMSTPCR7, 23, MSTPSR7, 0), /* DU1 */
[MSTP721] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 21, MSTPSR7, 0), /* SCIF0 */
[MSTP720] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 20, MSTPSR7, 0), /* SCIF1 */
[MSTP719] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 19, MSTPSR7, 0), /* SCIF2 */
[MSTP718] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 18, MSTPSR7, 0), /* SCIF3 */
[MSTP715] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 15, MSTPSR7, 0), /* SCIF4 */
[MSTP714] = SH_CLK_MSTP32_STS(&p_clk, SMSTPCR7, 14, MSTPSR7, 0), /* SCIF5 */
[MSTP522] = SH_CLK_MSTP32_STS(&extal_clk, SMSTPCR5, 22, MSTPSR5, 0), /* Thermal */
[MSTP314] = SH_CLK_MSTP32_STS(&div4_clks[DIV4_SD0], SMSTPCR3, 14, MSTPSR3, 0), /* SDHI0 */
[MSTP312] = SH_CLK_MSTP32_STS(&div6_clks[DIV6_SD1], SMSTPCR3, 12, MSTPSR3, 0), /* SDHI1 */
[MSTP311] = SH_CLK_MSTP32_STS(&div6_clks[DIV6_SD2], SMSTPCR3, 11, MSTPSR3, 0), /* SDHI2 */
[MSTP216] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 16, MSTPSR2, 0), /* SCIFB2 */
[MSTP207] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 7, MSTPSR2, 0), /* SCIFB1 */
[MSTP206] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 6, MSTPSR2, 0), /* SCIFB0 */
[MSTP204] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 4, MSTPSR2, 0), /* SCIFA0 */
[MSTP203] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 3, MSTPSR2, 0), /* SCIFA1 */
[MSTP202] = SH_CLK_MSTP32_STS(&mp_clk, SMSTPCR2, 2, MSTPSR2, 0), /* SCIFA2 */
[MSTP124] = SH_CLK_MSTP32_STS(&rclk_clk, SMSTPCR1, 24, MSTPSR1, 0), /* CMT0 */
};
static struct clk_lookup lookups[] = {
/* main clocks */
CLKDEV_CON_ID("extal", &extal_clk),
CLKDEV_CON_ID("extal_div2", &extal_div2_clk),
CLKDEV_CON_ID("main", &main_clk),
CLKDEV_CON_ID("pll1", &pll1_clk),
CLKDEV_CON_ID("pll1_div2", &pll1_div2_clk),
CLKDEV_CON_ID("pll3", &pll3_clk),
CLKDEV_CON_ID("zg", &zg_clk),
CLKDEV_CON_ID("zs", &zs_clk),
CLKDEV_CON_ID("hp", &hp_clk),
CLKDEV_CON_ID("p", &p_clk),
CLKDEV_CON_ID("qspi", &qspi_clk),
CLKDEV_CON_ID("rclk", &rclk_clk),
CLKDEV_CON_ID("mp", &mp_clk),
CLKDEV_CON_ID("cp", &cp_clk),
CLKDEV_CON_ID("peripheral_clk", &hp_clk),
/* MSTP */
CLKDEV_ICK_ID("lvds.0", "rcar-du-r8a7791", &mstp_clks[MSTP726]),
CLKDEV_ICK_ID("du.0", "rcar-du-r8a7791", &mstp_clks[MSTP724]),
CLKDEV_ICK_ID("du.1", "rcar-du-r8a7791", &mstp_clks[MSTP723]),
CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */
CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]), /* SCIFB0 */
CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]), /* SCIFB1 */
CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]), /* SCIFB2 */
CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP202]), /* SCIFA2 */
CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP721]), /* SCIF0 */
CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP720]), /* SCIF1 */
CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP719]), /* SCIF2 */
CLKDEV_DEV_ID("sh-sci.9", &mstp_clks[MSTP718]), /* SCIF3 */
CLKDEV_DEV_ID("sh-sci.10", &mstp_clks[MSTP715]), /* SCIF4 */
CLKDEV_DEV_ID("sh-sci.11", &mstp_clks[MSTP714]), /* SCIF5 */
CLKDEV_DEV_ID("sh-sci.12", &mstp_clks[MSTP1106]), /* SCIFA3 */
CLKDEV_DEV_ID("sh-sci.13", &mstp_clks[MSTP1107]), /* SCIFA4 */
CLKDEV_DEV_ID("sh-sci.14", &mstp_clks[MSTP1108]), /* SCIFA5 */
CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]),
CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP312]),
CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP311]),
CLKDEV_ICK_ID("fck", "sh-cmt-48-gen2.0", &mstp_clks[MSTP124]),
CLKDEV_DEV_ID("qspi.0", &mstp_clks[MSTP917]),
CLKDEV_DEV_ID("rcar_thermal", &mstp_clks[MSTP522]),
CLKDEV_DEV_ID("i2c-rcar_gen2.0", &mstp_clks[MSTP931]),
CLKDEV_DEV_ID("i2c-rcar_gen2.1", &mstp_clks[MSTP930]),
CLKDEV_DEV_ID("i2c-rcar_gen2.2", &mstp_clks[MSTP929]),
CLKDEV_DEV_ID("i2c-rcar_gen2.3", &mstp_clks[MSTP928]),
CLKDEV_DEV_ID("i2c-rcar_gen2.4", &mstp_clks[MSTP927]),
CLKDEV_DEV_ID("i2c-rcar_gen2.5", &mstp_clks[MSTP925]),
CLKDEV_DEV_ID("r8a7791-ether", &mstp_clks[MSTP813]), /* Ether */
CLKDEV_DEV_ID("r8a7791-vin.0", &mstp_clks[MSTP811]),
CLKDEV_DEV_ID("r8a7791-vin.1", &mstp_clks[MSTP810]),
CLKDEV_DEV_ID("r8a7791-vin.2", &mstp_clks[MSTP809]),
CLKDEV_DEV_ID("sata-r8a7791.0", &mstp_clks[MSTP815]),
CLKDEV_DEV_ID("sata-r8a7791.1", &mstp_clks[MSTP814]),
};
#define R8A7791_CLOCK_ROOT(e, m, p0, p1, p30, p31) \
extal_clk.rate = e * 1000 * 1000; \
main_clk.parent = m; \
SH_CLK_SET_RATIO(&pll1_clk_ratio, p1 / 2, 1); \
if (mode & MD(19)) \
SH_CLK_SET_RATIO(&pll3_clk_ratio, p31, 1); \
else \
SH_CLK_SET_RATIO(&pll3_clk_ratio, p30, 1)
void __init r8a7791_clock_init(void)
{
u32 mode = rcar_gen2_read_mode_pins();
int k, ret = 0;
switch (mode & (MD(14) | MD(13))) {
case 0:
R8A7791_CLOCK_ROOT(15, &extal_clk, 172, 208, 106, 88);
break;
case MD(13):
R8A7791_CLOCK_ROOT(20, &extal_clk, 130, 156, 80, 66);
break;
case MD(14):
R8A7791_CLOCK_ROOT(26, &extal_div2_clk, 200, 240, 122, 102);
break;
case MD(13) | MD(14):
R8A7791_CLOCK_ROOT(30, &extal_div2_clk, 172, 208, 106, 88);
break;
}
if ((mode & (MD(3) | MD(2) | MD(1))) == MD(2))
SH_CLK_SET_RATIO(&qspi_clk_ratio, 1, 16);
else
SH_CLK_SET_RATIO(&qspi_clk_ratio, 1, 20);
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]);
if (!ret)
ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
if (!ret)
ret = sh_clk_div6_register(div6_clks, DIV6_NR);
if (!ret)
ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
if (!ret)
shmobile_clk_init();
else
goto epanic;
return;
epanic:
panic("failed to setup r8a7791 clocks\n");
}