projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| eccf0607 MD |
1 | /* |
| 2 | * r8a73a4 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 0x270 | |
| 29 | ||
| 30 | #define MPCKCR 0xe6150080 | |
| 31 | ||
| 32 | static struct clk_mapping cpg_mapping = { | |
| 33 | .phys = CPG_BASE, | |
| 34 | .len = CPG_LEN, | |
| 35 | }; | |
| 36 | ||
| 37 | static struct clk extalr_clk = { | |
| 38 | .rate = 32768, | |
| 39 | .mapping = &cpg_mapping, | |
| 40 | }; | |
| 41 | ||
| 42 | static struct clk extal1_clk = { | |
| 43 | .rate = 26000000, | |
| 44 | .mapping = &cpg_mapping, | |
| 45 | }; | |
| 46 | ||
| 47 | static struct clk extal2_clk = { | |
| 48 | .rate = 48000000, | |
| 49 | .mapping = &cpg_mapping, | |
| 50 | }; | |
| 51 | ||
| 52 | static struct clk *main_clks[] = { | |
| 53 | &extalr_clk, | |
| 54 | &extal1_clk, | |
| 55 | &extal2_clk, | |
| 56 | }; | |
| 57 | ||
| 58 | enum { MSTP_NR }; | |
| 59 | static struct clk mstp_clks[MSTP_NR] = { | |
| 60 | }; | |
| 61 | ||
| 62 | static struct clk_lookup lookups[] = { | |
| 63 | }; | |
| 64 | ||
| 65 | void __init r8a73a4_clock_init(void) | |
| 66 | { | |
| 67 | void __iomem *cpg_base, *reg; | |
| 68 | int k, ret = 0; | |
| 69 | ||
| 70 | /* fix MPCLK to EXTAL2 for now. | |
| 71 | * this is needed until more detailed clock topology is supported | |
| 72 | */ | |
| 73 | cpg_base = ioremap_nocache(CPG_BASE, CPG_LEN); | |
| 74 | BUG_ON(!cpg_base); | |
| 75 | reg = cpg_base + (MPCKCR - CPG_BASE); | |
| 76 | iowrite32(ioread32(reg) | 1 << 7 | 0x0c, reg); /* set CKSEL */ | |
| 77 | iounmap(cpg_base); | |
| 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 r8a73a4 clocks\n"); | |
| 91 | } |