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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | /* * Marvell Armada 39x SoC clocks * * Copyright (C) 2015 Marvell * * Gregory CLEMENT <gregory.clement@free-electrons.com> * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> * Andrew Lunn <andrew@lunn.ch> * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include <linux/kernel.h> #include <linux/clk-provider.h> #include <linux/io.h> #include <linux/of.h> #include "common.h" /* * SARL[14:10] : Ratios between CPU, NBCLK, HCLK and DCLK. * * SARL[15] : TCLK frequency * 0 = 250 MHz * 1 = 200 MHz * * SARH[0] : Reference clock frequency * 0 = 25 Mhz * 1 = 40 Mhz */ #define SARL 0 #define SARL_A390_TCLK_FREQ_OPT 15 #define SARL_A390_TCLK_FREQ_OPT_MASK 0x1 #define SARL_A390_CPU_DDR_L2_FREQ_OPT 10 #define SARL_A390_CPU_DDR_L2_FREQ_OPT_MASK 0x1F #define SARH 4 #define SARH_A390_REFCLK_FREQ BIT(0) static const u32 armada_39x_tclk_frequencies[] __initconst = { 250000000, 200000000, }; static u32 __init armada_39x_get_tclk_freq(void __iomem *sar) { u8 tclk_freq_select; tclk_freq_select = ((readl(sar + SARL) >> SARL_A390_TCLK_FREQ_OPT) & SARL_A390_TCLK_FREQ_OPT_MASK); return armada_39x_tclk_frequencies[tclk_freq_select]; } static const u32 armada_39x_cpu_frequencies[] __initconst = { [0x0] = 666 * 1000 * 1000, [0x2] = 800 * 1000 * 1000, [0x3] = 800 * 1000 * 1000, [0x4] = 1066 * 1000 * 1000, [0x5] = 1066 * 1000 * 1000, [0x6] = 1200 * 1000 * 1000, [0x8] = 1332 * 1000 * 1000, [0xB] = 1600 * 1000 * 1000, [0xC] = 1600 * 1000 * 1000, [0x12] = 1800 * 1000 * 1000, [0x1E] = 1800 * 1000 * 1000, }; static u32 __init armada_39x_get_cpu_freq(void __iomem *sar) { u8 cpu_freq_select; cpu_freq_select = ((readl(sar + SARL) >> SARL_A390_CPU_DDR_L2_FREQ_OPT) & SARL_A390_CPU_DDR_L2_FREQ_OPT_MASK); if (cpu_freq_select >= ARRAY_SIZE(armada_39x_cpu_frequencies)) { pr_err("Selected CPU frequency (%d) unsupported\n", cpu_freq_select); return 0; } return armada_39x_cpu_frequencies[cpu_freq_select]; } enum { A390_CPU_TO_NBCLK, A390_CPU_TO_HCLK, A390_CPU_TO_DCLK }; static const struct coreclk_ratio armada_39x_coreclk_ratios[] __initconst = { { .id = A390_CPU_TO_NBCLK, .name = "nbclk" }, { .id = A390_CPU_TO_HCLK, .name = "hclk" }, { .id = A390_CPU_TO_DCLK, .name = "dclk" }, }; static void __init armada_39x_get_clk_ratio( void __iomem *sar, int id, int *mult, int *div) { switch (id) { case A390_CPU_TO_NBCLK: *mult = 1; *div = 2; break; case A390_CPU_TO_HCLK: *mult = 1; *div = 4; break; case A390_CPU_TO_DCLK: *mult = 1; *div = 2; break; } } static u32 __init armada_39x_refclk_ratio(void __iomem *sar) { if (readl(sar + SARH) & SARH_A390_REFCLK_FREQ) return 40 * 1000 * 1000; else return 25 * 1000 * 1000; } static const struct coreclk_soc_desc armada_39x_coreclks = { .get_tclk_freq = armada_39x_get_tclk_freq, .get_cpu_freq = armada_39x_get_cpu_freq, .get_clk_ratio = armada_39x_get_clk_ratio, .get_refclk_freq = armada_39x_refclk_ratio, .ratios = armada_39x_coreclk_ratios, .num_ratios = ARRAY_SIZE(armada_39x_coreclk_ratios), }; static void __init armada_39x_coreclk_init(struct device_node *np) { mvebu_coreclk_setup(np, &armada_39x_coreclks); } CLK_OF_DECLARE(armada_39x_core_clk, "marvell,armada-390-core-clock", armada_39x_coreclk_init); /* * Clock Gating Control */ static const struct clk_gating_soc_desc armada_39x_gating_desc[] __initconst = { { "pex1", NULL, 5 }, { "pex2", NULL, 6 }, { "pex3", NULL, 7 }, { "pex0", NULL, 8 }, { "usb3h0", NULL, 9 }, { "usb3h1", NULL, 10 }, { "sata0", NULL, 15 }, { "sdio", NULL, 17 }, { "xor0", NULL, 22 }, { "xor1", NULL, 28 }, { } }; static void __init armada_39x_clk_gating_init(struct device_node *np) { mvebu_clk_gating_setup(np, armada_39x_gating_desc); } CLK_OF_DECLARE(armada_39x_clk_gating, "marvell,armada-390-gating-clock", armada_39x_clk_gating_init); |