1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * arch/sh/kernel/cpu/sh4/clock-shx3.c 4 * 5 * SH-X3 support for the clock framework 6 * 7 * Copyright (C) 2006-2007 Renesas Technology Corp. 8 * Copyright (C) 2006-2007 Renesas Solutions Corp. 9 * Copyright (C) 2006-2010 Paul Mundt 10 */ 11 #include <linux/init.h> 12 #include <linux/kernel.h> 13 #include <linux/io.h> 14 #include <linux/clkdev.h> 15 #include <asm/clock.h> 16 #include <asm/freq.h> 17 18 /* 19 * Default rate for the root input clock, reset this with clk_set_rate() 20 * from the platform code. 21 */ 22 static struct clk extal_clk = { 23 .rate = 16666666, 24 }; 25 26 static unsigned long pll_recalc(struct clk *clk) 27 { 28 /* PLL1 has a fixed x72 multiplier. */ 29 return clk->parent->rate * 72; 30 } 31 32 static struct sh_clk_ops pll_clk_ops = { 33 .recalc = pll_recalc, 34 }; 35 36 static struct clk pll_clk = { 37 .ops = &pll_clk_ops, 38 .parent = &extal_clk, 39 .flags = CLK_ENABLE_ON_INIT, 40 }; 41 42 static struct clk *clks[] = { 43 &extal_clk, 44 &pll_clk, 45 }; 46 47 static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18, 48 24, 32, 36, 48 }; 49 50 static struct clk_div_mult_table div4_div_mult_table = { 51 .divisors = div2, 52 .nr_divisors = ARRAY_SIZE(div2), 53 }; 54 55 static struct clk_div4_table div4_table = { 56 .div_mult_table = &div4_div_mult_table, 57 }; 58 59 enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_SHA, DIV4_P, DIV4_NR }; 60 61 #define DIV4(_bit, _mask, _flags) \ 62 SH_CLK_DIV4(&pll_clk, FRQMR1, _bit, _mask, _flags) 63 64 struct clk div4_clks[DIV4_NR] = { 65 [DIV4_P] = DIV4(0, 0x0f80, 0), 66 [DIV4_SHA] = DIV4(4, 0x0ff0, 0), 67 [DIV4_DDR] = DIV4(12, 0x000c, CLK_ENABLE_ON_INIT), 68 [DIV4_B] = DIV4(16, 0x0fe0, CLK_ENABLE_ON_INIT), 69 [DIV4_SH] = DIV4(20, 0x000c, CLK_ENABLE_ON_INIT), 70 [DIV4_I] = DIV4(28, 0x000e, CLK_ENABLE_ON_INIT), 71 }; 72 73 #define MSTPCR0 0xffc00030 74 #define MSTPCR1 0xffc00034 75 76 enum { MSTP027, MSTP026, MSTP025, MSTP024, 77 MSTP009, MSTP008, MSTP003, MSTP002, 78 MSTP001, MSTP000, MSTP119, MSTP105, 79 MSTP104, MSTP_NR }; 80 81 static struct clk mstp_clks[MSTP_NR] = { 82 /* MSTPCR0 */ 83 [MSTP027] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 27, 0), 84 [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0), 85 [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0), 86 [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0), 87 [MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0), 88 [MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0), 89 [MSTP003] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 3, 0), 90 [MSTP002] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 2, 0), 91 [MSTP001] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 1, 0), 92 [MSTP000] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 0, 0), 93 94 /* MSTPCR1 */ 95 [MSTP119] = SH_CLK_MSTP32(NULL, MSTPCR1, 19, 0), 96 [MSTP105] = SH_CLK_MSTP32(NULL, MSTPCR1, 5, 0), 97 [MSTP104] = SH_CLK_MSTP32(NULL, MSTPCR1, 4, 0), 98 }; 99 100 static struct clk_lookup lookups[] = { 101 /* main clocks */ 102 CLKDEV_CON_ID("extal", &extal_clk), 103 CLKDEV_CON_ID("pll_clk", &pll_clk), 104 105 /* DIV4 clocks */ 106 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), 107 CLKDEV_CON_ID("shywaya_clk", &div4_clks[DIV4_SHA]), 108 CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_DDR]), 109 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), 110 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]), 111 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), 112 113 /* MSTP32 clocks */ 114 CLKDEV_ICK_ID("fck", "sh-sci.3", &mstp_clks[MSTP027]), 115 CLKDEV_ICK_ID("fck", "sh-sci.2", &mstp_clks[MSTP026]), 116 CLKDEV_ICK_ID("fck", "sh-sci.1", &mstp_clks[MSTP025]), 117 CLKDEV_ICK_ID("fck", "sh-sci.0", &mstp_clks[MSTP024]), 118 119 CLKDEV_CON_ID("h8ex_fck", &mstp_clks[MSTP003]), 120 CLKDEV_CON_ID("csm_fck", &mstp_clks[MSTP002]), 121 CLKDEV_CON_ID("fe1_fck", &mstp_clks[MSTP001]), 122 CLKDEV_CON_ID("fe0_fck", &mstp_clks[MSTP000]), 123 124 CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP008]), 125 CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP009]), 126 127 CLKDEV_CON_ID("hudi_fck", &mstp_clks[MSTP119]), 128 CLKDEV_CON_ID("dmac_11_6_fck", &mstp_clks[MSTP105]), 129 CLKDEV_CON_ID("dmac_5_0_fck", &mstp_clks[MSTP104]), 130 }; 131 132 int __init arch_clk_init(void) 133 { 134 int i, ret = 0; 135 136 for (i = 0; i < ARRAY_SIZE(clks); i++) 137 ret |= clk_register(clks[i]); 138 139 clkdev_add_table(lookups, ARRAY_SIZE(lookups)); 140 141 if (!ret) 142 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks), 143 &div4_table); 144 if (!ret) 145 ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); 146 147 return ret; 148 } 149