1 /* 2 * arch/sh/kernel/cpu/sh4a/clock-sh7786.c 3 * 4 * SH7786 support for the clock framework 5 * 6 * Copyright (C) 2010 Paul Mundt 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file "COPYING" in the main directory of this archive 10 * for more details. 11 */ 12 #include <linux/init.h> 13 #include <linux/kernel.h> 14 #include <linux/clk.h> 15 #include <linux/io.h> 16 #include <linux/clkdev.h> 17 #include <asm/clock.h> 18 #include <asm/freq.h> 19 20 /* 21 * Default rate for the root input clock, reset this with clk_set_rate() 22 * from the platform code. 23 */ 24 static struct clk extal_clk = { 25 .rate = 33333333, 26 }; 27 28 static unsigned long pll_recalc(struct clk *clk) 29 { 30 int multiplier; 31 32 /* 33 * Clock modes 0, 1, and 2 use an x64 multiplier against PLL1, 34 * while modes 3, 4, and 5 use an x32. 35 */ 36 multiplier = (sh_mv.mv_mode_pins() & 0xf) < 3 ? 64 : 32; 37 38 return clk->parent->rate * multiplier; 39 } 40 41 static struct sh_clk_ops pll_clk_ops = { 42 .recalc = pll_recalc, 43 }; 44 45 static struct clk pll_clk = { 46 .ops = &pll_clk_ops, 47 .parent = &extal_clk, 48 .flags = CLK_ENABLE_ON_INIT, 49 }; 50 51 static struct clk *clks[] = { 52 &extal_clk, 53 &pll_clk, 54 }; 55 56 static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18, 57 24, 32, 36, 48 }; 58 59 static struct clk_div_mult_table div4_div_mult_table = { 60 .divisors = div2, 61 .nr_divisors = ARRAY_SIZE(div2), 62 }; 63 64 static struct clk_div4_table div4_table = { 65 .div_mult_table = &div4_div_mult_table, 66 }; 67 68 enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_DU, DIV4_P, DIV4_NR }; 69 70 #define DIV4(_bit, _mask, _flags) \ 71 SH_CLK_DIV4(&pll_clk, FRQMR1, _bit, _mask, _flags) 72 73 struct clk div4_clks[DIV4_NR] = { 74 [DIV4_P] = DIV4(0, 0x0b40, 0), 75 [DIV4_DU] = DIV4(4, 0x0010, 0), 76 [DIV4_DDR] = DIV4(12, 0x0002, CLK_ENABLE_ON_INIT), 77 [DIV4_B] = DIV4(16, 0x0360, CLK_ENABLE_ON_INIT), 78 [DIV4_SH] = DIV4(20, 0x0002, CLK_ENABLE_ON_INIT), 79 [DIV4_I] = DIV4(28, 0x0006, CLK_ENABLE_ON_INIT), 80 }; 81 82 #define MSTPCR0 0xffc40030 83 #define MSTPCR1 0xffc40034 84 85 enum { MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024, 86 MSTP023, MSTP022, MSTP021, MSTP020, MSTP017, MSTP016, 87 MSTP015, MSTP014, MSTP011, MSTP010, MSTP009, MSTP008, 88 MSTP005, MSTP004, MSTP002, 89 MSTP112, MSTP110, MSTP109, MSTP108, 90 MSTP105, MSTP104, MSTP103, MSTP102, 91 MSTP_NR }; 92 93 static struct clk mstp_clks[MSTP_NR] = { 94 /* MSTPCR0 */ 95 [MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0), 96 [MSTP028] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 28, 0), 97 [MSTP027] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 27, 0), 98 [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0), 99 [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0), 100 [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0), 101 [MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0), 102 [MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0), 103 [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0), 104 [MSTP020] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 20, 0), 105 [MSTP017] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 17, 0), 106 [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0), 107 [MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0), 108 [MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0), 109 [MSTP011] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0), 110 [MSTP010] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0), 111 [MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0), 112 [MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0), 113 [MSTP005] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 5, 0), 114 [MSTP004] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 4, 0), 115 [MSTP002] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 2, 0), 116 117 /* MSTPCR1 */ 118 [MSTP112] = SH_CLK_MSTP32(NULL, MSTPCR1, 12, 0), 119 [MSTP110] = SH_CLK_MSTP32(NULL, MSTPCR1, 10, 0), 120 [MSTP109] = SH_CLK_MSTP32(NULL, MSTPCR1, 9, 0), 121 [MSTP108] = SH_CLK_MSTP32(NULL, MSTPCR1, 8, 0), 122 [MSTP105] = SH_CLK_MSTP32(NULL, MSTPCR1, 5, 0), 123 [MSTP104] = SH_CLK_MSTP32(NULL, MSTPCR1, 4, 0), 124 [MSTP103] = SH_CLK_MSTP32(NULL, MSTPCR1, 3, 0), 125 [MSTP102] = SH_CLK_MSTP32(NULL, MSTPCR1, 2, 0), 126 }; 127 128 static struct clk_lookup lookups[] = { 129 /* main clocks */ 130 CLKDEV_CON_ID("extal", &extal_clk), 131 CLKDEV_CON_ID("pll_clk", &pll_clk), 132 133 /* DIV4 clocks */ 134 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), 135 CLKDEV_CON_ID("du_clk", &div4_clks[DIV4_DU]), 136 CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_DDR]), 137 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), 138 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]), 139 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), 140 141 /* MSTP32 clocks */ 142 CLKDEV_ICK_ID("sci_fck", "sh-sci.5", &mstp_clks[MSTP029]), 143 CLKDEV_ICK_ID("sci_fck", "sh-sci.4", &mstp_clks[MSTP028]), 144 CLKDEV_ICK_ID("sci_fck", "sh-sci.3", &mstp_clks[MSTP027]), 145 CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP026]), 146 CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP025]), 147 CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP024]), 148 149 CLKDEV_CON_ID("ssi3_fck", &mstp_clks[MSTP023]), 150 CLKDEV_CON_ID("ssi2_fck", &mstp_clks[MSTP022]), 151 CLKDEV_CON_ID("ssi1_fck", &mstp_clks[MSTP021]), 152 CLKDEV_CON_ID("ssi0_fck", &mstp_clks[MSTP020]), 153 CLKDEV_CON_ID("hac1_fck", &mstp_clks[MSTP017]), 154 CLKDEV_CON_ID("hac0_fck", &mstp_clks[MSTP016]), 155 CLKDEV_CON_ID("i2c1_fck", &mstp_clks[MSTP015]), 156 CLKDEV_CON_ID("i2c0_fck", &mstp_clks[MSTP014]), 157 158 CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP008]), 159 CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP009]), 160 CLKDEV_ICK_ID("fck", "sh-tmu.2", &mstp_clks[MSTP010]), 161 CLKDEV_ICK_ID("fck", "sh-tmu.3", &mstp_clks[MSTP011]), 162 163 CLKDEV_CON_ID("sdif1_fck", &mstp_clks[MSTP005]), 164 CLKDEV_CON_ID("sdif0_fck", &mstp_clks[MSTP004]), 165 CLKDEV_CON_ID("hspi_fck", &mstp_clks[MSTP002]), 166 CLKDEV_CON_ID("usb_fck", &mstp_clks[MSTP112]), 167 CLKDEV_CON_ID("pcie2_fck", &mstp_clks[MSTP110]), 168 CLKDEV_CON_ID("pcie1_fck", &mstp_clks[MSTP109]), 169 CLKDEV_CON_ID("pcie0_fck", &mstp_clks[MSTP108]), 170 CLKDEV_CON_ID("dmac_11_6_fck", &mstp_clks[MSTP105]), 171 CLKDEV_CON_ID("dmac_5_0_fck", &mstp_clks[MSTP104]), 172 CLKDEV_CON_ID("du_fck", &mstp_clks[MSTP103]), 173 CLKDEV_CON_ID("ether_fck", &mstp_clks[MSTP102]), 174 }; 175 176 int __init arch_clk_init(void) 177 { 178 int i, ret = 0; 179 180 for (i = 0; i < ARRAY_SIZE(clks); i++) 181 ret |= clk_register(clks[i]); 182 183 clkdev_add_table(lookups, ARRAY_SIZE(lookups)); 184 185 if (!ret) 186 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks), 187 &div4_table); 188 if (!ret) 189 ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); 190 191 return ret; 192 } 193