-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
sh: sh7723 clock framework rewrite V2
This patch contains V2 of the sh7723 clock framework rewrite. The new code makes use of the recently merged div4, div6 and mstp32 helper code. Both extal and dll are supported as input clocks to the pll. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
- Loading branch information
Magnus Damm
authored and
Paul Mundt
committed
Jun 11, 2009
1 parent
098dee9
commit c521dc0
Showing
4 changed files
with
225 additions
and
58 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,222 @@ | ||
| /* | ||
| * arch/sh/kernel/cpu/sh4a/clock-sh7723.c | ||
| * | ||
| * SH7723 clock framework support | ||
| * | ||
| * Copyright (C) 2009 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/init.h> | ||
| #include <linux/kernel.h> | ||
| #include <linux/io.h> | ||
| #include <asm/clock.h> | ||
|
|
||
| /* SH7723 registers */ | ||
| #define FRQCR 0xa4150000 | ||
| #define VCLKCR 0xa4150004 | ||
| #define SCLKACR 0xa4150008 | ||
| #define SCLKBCR 0xa415000c | ||
| #define IRDACLKCR 0xa4150018 | ||
| #define PLLCR 0xa4150024 | ||
| #define MSTPCR0 0xa4150030 | ||
| #define MSTPCR1 0xa4150034 | ||
| #define MSTPCR2 0xa4150038 | ||
| #define DLLFRQ 0xa4150050 | ||
|
|
||
| /* Fixed 32 KHz root clock for RTC and Power Management purposes */ | ||
| static struct clk r_clk = { | ||
| .name = "rclk", | ||
| .id = -1, | ||
| .rate = 32768, | ||
| }; | ||
|
|
||
| /* | ||
| * Default rate for the root input clock, reset this with clk_set_rate() | ||
| * from the platform code. | ||
| */ | ||
| struct clk extal_clk = { | ||
| .name = "extal", | ||
| .id = -1, | ||
| .rate = 33333333, | ||
| }; | ||
|
|
||
| /* The dll multiplies the 32khz r_clk, may be used instead of extal */ | ||
| static unsigned long dll_recalc(struct clk *clk) | ||
| { | ||
| unsigned long mult; | ||
|
|
||
| if (__raw_readl(PLLCR) & 0x1000) | ||
| mult = __raw_readl(DLLFRQ); | ||
| else | ||
| mult = 0; | ||
|
|
||
| return clk->parent->rate * mult; | ||
| } | ||
|
|
||
| static struct clk_ops dll_clk_ops = { | ||
| .recalc = dll_recalc, | ||
| }; | ||
|
|
||
| static struct clk dll_clk = { | ||
| .name = "dll_clk", | ||
| .id = -1, | ||
| .ops = &dll_clk_ops, | ||
| .parent = &r_clk, | ||
| .flags = CLK_ENABLE_ON_INIT, | ||
| }; | ||
|
|
||
| static unsigned long pll_recalc(struct clk *clk) | ||
| { | ||
| unsigned long mult = 1; | ||
| unsigned long div = 1; | ||
|
|
||
| if (__raw_readl(PLLCR) & 0x4000) | ||
| mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1); | ||
| else | ||
| div = 2; | ||
|
|
||
| return (clk->parent->rate * mult) / div; | ||
| } | ||
|
|
||
| static struct clk_ops pll_clk_ops = { | ||
| .recalc = pll_recalc, | ||
| }; | ||
|
|
||
| static struct clk pll_clk = { | ||
| .name = "pll_clk", | ||
| .id = -1, | ||
| .ops = &pll_clk_ops, | ||
| .flags = CLK_ENABLE_ON_INIT, | ||
| }; | ||
|
|
||
| struct clk *main_clks[] = { | ||
| &r_clk, | ||
| &extal_clk, | ||
| &dll_clk, | ||
| &pll_clk, | ||
| }; | ||
|
|
||
| static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; | ||
| static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 }; | ||
|
|
||
| static struct clk_div_mult_table div4_table = { | ||
| .divisors = divisors, | ||
| .nr_divisors = ARRAY_SIZE(divisors), | ||
| .multipliers = multipliers, | ||
| .nr_multipliers = ARRAY_SIZE(multipliers), | ||
| }; | ||
|
|
||
| enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, | ||
| DIV4_SIUA, DIV4_SIUB, DIV4_IRDA, DIV4_NR }; | ||
|
|
||
| #define DIV4(_str, _reg, _bit, _mask, _flags) \ | ||
| SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags) | ||
|
|
||
| struct clk div4_clks[DIV4_NR] = { | ||
| [DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x0dbf, CLK_ENABLE_ON_INIT), | ||
| [DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT), | ||
| [DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT), | ||
| [DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT), | ||
| [DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT), | ||
| [DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x0dbf, 0), | ||
| [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x0dbf, 0), | ||
| [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x0dbf, 0), | ||
| [DIV4_IRDA] = DIV4("irda_clk", IRDACLKCR, 0, 0x0dbf, 0), | ||
| }; | ||
|
|
||
| struct clk div6_clks[] = { | ||
| SH_CLK_DIV6("video_clk", &pll_clk, VCLKCR, 0), | ||
| }; | ||
|
|
||
| #define MSTP(_str, _parent, _reg, _bit, _force_on, _need_cpg, _need_ram) \ | ||
| SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _force_on * CLK_ENABLE_ON_INIT) | ||
|
|
||
| static struct clk mstp_clks[] = { | ||
| /* See page 60 of Datasheet V1.0: Overview -> Block Diagram */ | ||
| MSTP("tlb0", &div4_clks[DIV4_I], MSTPCR0, 31, 1, 1, 0), | ||
| MSTP("ic0", &div4_clks[DIV4_I], MSTPCR0, 30, 1, 1, 0), | ||
| MSTP("oc0", &div4_clks[DIV4_I], MSTPCR0, 29, 1, 1, 0), | ||
| MSTP("l2c0", &div4_clks[DIV4_SH], MSTPCR0, 28, 1, 1, 0), | ||
| MSTP("ilmem0", &div4_clks[DIV4_I], MSTPCR0, 27, 1, 1, 0), | ||
| MSTP("fpu0", &div4_clks[DIV4_I], MSTPCR0, 24, 1, 1, 0), | ||
| MSTP("intc0", &div4_clks[DIV4_I], MSTPCR0, 22, 1, 1, 0), | ||
| MSTP("dmac0", &div4_clks[DIV4_B], MSTPCR0, 21, 0, 1, 1), | ||
| MSTP("sh0", &div4_clks[DIV4_SH], MSTPCR0, 20, 0, 1, 0), | ||
| MSTP("hudi0", &div4_clks[DIV4_P], MSTPCR0, 19, 0, 1, 0), | ||
| MSTP("ubc0", &div4_clks[DIV4_I], MSTPCR0, 17, 0, 1, 0), | ||
| MSTP("tmu0", &div4_clks[DIV4_P], MSTPCR0, 15, 0, 1, 0), | ||
| MSTP("cmt0", &r_clk, MSTPCR0, 14, 0, 0, 0), | ||
| MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0, 0, 0), | ||
| MSTP("dmac1", &div4_clks[DIV4_B], MSTPCR0, 12, 0, 1, 1), | ||
| MSTP("tmu1", &div4_clks[DIV4_P], MSTPCR0, 11, 0, 1, 0), | ||
| MSTP("flctl0", &div4_clks[DIV4_P], MSTPCR0, 10, 0, 1, 0), | ||
| MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 9, 0, 1, 0), | ||
| MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 8, 0, 1, 0), | ||
| MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 7, 0, 1, 0), | ||
| MSTP("scif3", &div4_clks[DIV4_B], MSTPCR0, 6, 0, 1, 0), | ||
| MSTP("scif4", &div4_clks[DIV4_B], MSTPCR0, 5, 0, 1, 0), | ||
| MSTP("scif5", &div4_clks[DIV4_B], MSTPCR0, 4, 0, 1, 0), | ||
| MSTP("msiof0", &div4_clks[DIV4_B], MSTPCR0, 2, 0, 1, 0), | ||
| MSTP("msiof1", &div4_clks[DIV4_B], MSTPCR0, 1, 0, 1, 0), | ||
| MSTP("meram0", &div4_clks[DIV4_SH], MSTPCR0, 0, 1, 1, 0), | ||
|
|
||
| MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0, 1, 0), | ||
| MSTP("rtc0", &r_clk, MSTPCR1, 8, 0, 0, 0), | ||
|
|
||
| MSTP("atapi0", &div4_clks[DIV4_SH], MSTPCR2, 28, 0, 1, 0), | ||
| MSTP("adc0", &div4_clks[DIV4_P], MSTPCR2, 27, 0, 1, 0), | ||
| MSTP("tpu0", &div4_clks[DIV4_B], MSTPCR2, 25, 0, 1, 0), | ||
| MSTP("irda0", &div4_clks[DIV4_P], MSTPCR2, 24, 0, 1, 0), | ||
| MSTP("tsif0", &div4_clks[DIV4_B], MSTPCR2, 22, 0, 1, 0), | ||
| MSTP("icb0", &div4_clks[DIV4_B], MSTPCR2, 21, 0, 1, 1), | ||
| MSTP("sdhi0", &div4_clks[DIV4_B], MSTPCR2, 18, 0, 1, 0), | ||
| MSTP("sdhi1", &div4_clks[DIV4_B], MSTPCR2, 17, 0, 1, 0), | ||
| MSTP("keysc0", &r_clk, MSTPCR2, 14, 0, 0, 0), | ||
| MSTP("usb0", &div4_clks[DIV4_B], MSTPCR2, 11, 0, 1, 0), | ||
| MSTP("2dg0", &div4_clks[DIV4_B], MSTPCR2, 10, 0, 1, 1), | ||
| MSTP("siu0", &div4_clks[DIV4_B], MSTPCR2, 8, 0, 1, 0), | ||
| MSTP("veu1", &div4_clks[DIV4_B], MSTPCR2, 6, 1, 1, 1), | ||
| MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0, 1, 1), | ||
| MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0, 1, 1), | ||
| MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0, 1, 1), | ||
| MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, 1, 1, 1), | ||
| MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, 1, 1, 1), | ||
| MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0, 1, 1), | ||
| }; | ||
|
|
||
| int __init arch_clk_init(void) | ||
| { | ||
| int k, ret = 0; | ||
|
|
||
| /* autodetect extal or dll configuration */ | ||
| if (__raw_readl(PLLCR) & 0x1000) | ||
| pll_clk.parent = &dll_clk; | ||
| else | ||
| pll_clk.parent = &extal_clk; | ||
|
|
||
| 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, ARRAY_SIZE(div6_clks)); | ||
|
|
||
| if (!ret) | ||
| ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks)); | ||
|
|
||
| return ret; | ||
| } |