Magnus Damm | 0468b2d | 2013-03-28 00:49:34 +0900 | [diff] [blame] | 1 | /* |
| 2 | * r8a7790 clock framework support |
| 3 | * |
| 4 | * Copyright (C) 2013 Renesas Solutions Corp. |
| 5 | * Copyright (C) 2013 Magnus Damm |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; version 2 of the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/sh_clk.h> |
| 24 | #include <linux/clkdev.h> |
| 25 | #include <mach/common.h> |
| 26 | |
| 27 | #define CPG_BASE 0xe6150000 |
| 28 | #define CPG_LEN 0x1000 |
| 29 | |
Magnus Damm | 55d9fab | 2013-03-28 00:49:44 +0900 | [diff] [blame^] | 30 | #define SMSTPCR2 0xe6150138 |
| 31 | #define SMSTPCR7 0xe615014c |
| 32 | |
Magnus Damm | 0468b2d | 2013-03-28 00:49:34 +0900 | [diff] [blame] | 33 | static struct clk_mapping cpg_mapping = { |
| 34 | .phys = CPG_BASE, |
| 35 | .len = CPG_LEN, |
| 36 | }; |
| 37 | |
Magnus Damm | 55d9fab | 2013-03-28 00:49:44 +0900 | [diff] [blame^] | 38 | static struct clk p_clk = { |
| 39 | .rate = 65000000, /* shortcut for now */ |
| 40 | .mapping = &cpg_mapping, |
Magnus Damm | 0468b2d | 2013-03-28 00:49:34 +0900 | [diff] [blame] | 41 | }; |
| 42 | |
Magnus Damm | 55d9fab | 2013-03-28 00:49:44 +0900 | [diff] [blame^] | 43 | static struct clk mp_clk = { |
| 44 | .rate = 52000000, /* shortcut for now */ |
| 45 | .mapping = &cpg_mapping, |
| 46 | }; |
| 47 | |
| 48 | static struct clk *main_clks[] = { |
| 49 | &p_clk, |
| 50 | &mp_clk, |
| 51 | }; |
| 52 | |
| 53 | enum { MSTP721, MSTP720, |
| 54 | MSTP216, MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP_NR }; |
Magnus Damm | 0468b2d | 2013-03-28 00:49:34 +0900 | [diff] [blame] | 55 | static struct clk mstp_clks[MSTP_NR] = { |
Magnus Damm | 55d9fab | 2013-03-28 00:49:44 +0900 | [diff] [blame^] | 56 | [MSTP721] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 21, 0), /* SCIF0 */ |
| 57 | [MSTP720] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 20, 0), /* SCIF1 */ |
| 58 | [MSTP216] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 16, 0), /* SCIFB2 */ |
| 59 | [MSTP207] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 7, 0), /* SCIFB1 */ |
| 60 | [MSTP206] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 6, 0), /* SCIFB0 */ |
| 61 | [MSTP204] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 4, 0), /* SCIFA0 */ |
| 62 | [MSTP203] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 3, 0), /* SCIFA1 */ |
| 63 | [MSTP202] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 2, 0), /* SCIFA2 */ |
Magnus Damm | 0468b2d | 2013-03-28 00:49:34 +0900 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | static struct clk_lookup lookups[] = { |
Magnus Damm | 55d9fab | 2013-03-28 00:49:44 +0900 | [diff] [blame^] | 67 | CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), |
| 68 | CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), |
| 69 | CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]), |
| 70 | CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]), |
| 71 | CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]), |
| 72 | CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP202]), |
| 73 | CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP721]), |
| 74 | CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP720]), |
Magnus Damm | 0468b2d | 2013-03-28 00:49:34 +0900 | [diff] [blame] | 75 | }; |
| 76 | |
| 77 | void __init r8a7790_clock_init(void) |
| 78 | { |
| 79 | int k, ret = 0; |
| 80 | |
| 81 | for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) |
| 82 | ret = clk_register(main_clks[k]); |
| 83 | |
| 84 | if (!ret) |
| 85 | ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); |
| 86 | |
| 87 | clkdev_add_table(lookups, ARRAY_SIZE(lookups)); |
| 88 | |
| 89 | if (!ret) |
| 90 | shmobile_clk_init(); |
| 91 | else |
| 92 | panic("failed to setup r8a7790 clocks\n"); |
| 93 | } |