| Kuninori Morimoto | ccb7cc7 | 2013-03-21 03:01:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * r8a7778 clock framework support |
| 3 | * |
| 4 | * Copyright (C) 2013 Renesas Solutions Corp. |
| 5 | * Copyright (C) 2013 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 6 | * |
| 7 | * based on r8a7779 |
| 8 | * |
| 9 | * Copyright (C) 2011 Renesas Solutions Corp. |
| 10 | * Copyright (C) 2011 Magnus Damm |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | #include <linux/io.h> |
| 27 | #include <linux/sh_clk.h> |
| 28 | #include <linux/clkdev.h> |
| 29 | #include <mach/common.h> |
| 30 | |
| 31 | #define MSTPCR0 IOMEM(0xffc80030) |
| 32 | #define MSTPCR1 IOMEM(0xffc80034) |
| 33 | #define MSTPCR3 IOMEM(0xffc8003c) |
| 34 | #define MSTPSR1 IOMEM(0xffc80044) |
| 35 | #define MSTPSR4 IOMEM(0xffc80048) |
| 36 | #define MSTPSR6 IOMEM(0xffc8004c) |
| 37 | #define MSTPCR4 IOMEM(0xffc80050) |
| 38 | #define MSTPCR5 IOMEM(0xffc80054) |
| 39 | #define MSTPCR6 IOMEM(0xffc80058) |
| 40 | |
| 41 | /* ioremap() through clock mapping mandatory to avoid |
| 42 | * collision with ARM coherent DMA virtual memory range. |
| 43 | */ |
| 44 | |
| 45 | static struct clk_mapping cpg_mapping = { |
| 46 | .phys = 0xffc80000, |
| 47 | .len = 0x80, |
| 48 | }; |
| 49 | |
| 50 | static struct clk clkp = { |
| 51 | .rate = 62500000, /* FIXME: shortcut */ |
| 52 | .flags = CLK_ENABLE_ON_INIT, |
| 53 | .mapping = &cpg_mapping, |
| 54 | }; |
| 55 | |
| 56 | static struct clk *main_clks[] = { |
| 57 | &clkp, |
| 58 | }; |
| 59 | |
| 60 | enum { |
| 61 | MSTP016, MSTP015, |
| 62 | MSTP_NR }; |
| 63 | |
| 64 | static struct clk mstp_clks[MSTP_NR] = { |
| 65 | [MSTP016] = SH_CLK_MSTP32(&clkp, MSTPCR0, 16, 0), /* TMU0 */ |
| 66 | [MSTP015] = SH_CLK_MSTP32(&clkp, MSTPCR0, 15, 0), /* TMU1 */ |
| 67 | }; |
| 68 | |
| 69 | static struct clk_lookup lookups[] = { |
| 70 | /* MSTP32 clocks */ |
| 71 | CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */ |
| 72 | CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP015]), /* TMU01 */ |
| 73 | }; |
| 74 | |
| 75 | void __init r8a7778_clock_init(void) |
| 76 | { |
| 77 | int k, ret = 0; |
| 78 | |
| 79 | for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) |
| 80 | ret = clk_register(main_clks[k]); |
| 81 | |
| 82 | if (!ret) |
| 83 | ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); |
| 84 | |
| 85 | clkdev_add_table(lookups, ARRAY_SIZE(lookups)); |
| 86 | |
| 87 | if (!ret) |
| 88 | shmobile_clk_init(); |
| 89 | else |
| 90 | panic("failed to setup r8a7778 clocks\n"); |
| 91 | } |