1 // SPDX-License-Identifier: GPL-2.0
3 * Marvell Armada 380/385 SoC clocks
5 * Copyright (C) 2014 Marvell
13 #include <linux/kernel.h>
14 #include <linux/clk-provider.h>
20 * SAR[14:10] : Ratios between PCLK0, NBCLK, HCLK and DRAM clocks
22 * SAR[15] : TCLK frequency
27 #define SAR_A380_TCLK_FREQ_OPT 15
28 #define SAR_A380_TCLK_FREQ_OPT_MASK 0x1
29 #define SAR_A380_CPU_DDR_L2_FREQ_OPT 10
30 #define SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
32 static const u32 armada_38x_tclk_frequencies[] __initconst = {
37 static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)
41 tclk_freq_select = ((readl(sar) >> SAR_A380_TCLK_FREQ_OPT) &
42 SAR_A380_TCLK_FREQ_OPT_MASK);
43 return armada_38x_tclk_frequencies[tclk_freq_select];
46 static const u32 armada_38x_cpu_frequencies[] __initconst = {
47 666 * 1000 * 1000, 0, 800 * 1000 * 1000, 0,
48 1066 * 1000 * 1000, 0, 1200 * 1000 * 1000, 0,
49 1332 * 1000 * 1000, 0, 0, 0,
50 1600 * 1000 * 1000, 0, 0, 0,
51 1866 * 1000 * 1000, 0, 0, 2000 * 1000 * 1000,
54 static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)
58 cpu_freq_select = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
59 SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
60 if (cpu_freq_select >= ARRAY_SIZE(armada_38x_cpu_frequencies)) {
61 pr_err("Selected CPU frequency (%d) unsupported\n",
66 return armada_38x_cpu_frequencies[cpu_freq_select];
69 enum { A380_CPU_TO_DDR, A380_CPU_TO_L2 };
71 static const struct coreclk_ratio armada_38x_coreclk_ratios[] __initconst = {
72 { .id = A380_CPU_TO_L2, .name = "l2clk" },
73 { .id = A380_CPU_TO_DDR, .name = "ddrclk" },
76 static const int armada_38x_cpu_l2_ratios[32][2] __initconst = {
77 {1, 2}, {0, 1}, {1, 2}, {0, 1},
78 {1, 2}, {0, 1}, {1, 2}, {0, 1},
79 {1, 2}, {0, 1}, {0, 1}, {0, 1},
80 {1, 2}, {0, 1}, {0, 1}, {0, 1},
81 {1, 2}, {0, 1}, {0, 1}, {1, 2},
82 {0, 1}, {0, 1}, {0, 1}, {0, 1},
83 {0, 1}, {0, 1}, {0, 1}, {0, 1},
84 {0, 1}, {0, 1}, {0, 1}, {0, 1},
87 static const int armada_38x_cpu_ddr_ratios[32][2] __initconst = {
88 {0, 1}, {0, 1}, {0, 1}, {0, 1},
89 {1, 2}, {0, 1}, {0, 1}, {0, 1},
90 {1, 2}, {0, 1}, {0, 1}, {0, 1},
91 {1, 2}, {0, 1}, {0, 1}, {0, 1},
92 {1, 2}, {0, 1}, {0, 1}, {7, 15},
93 {0, 1}, {0, 1}, {0, 1}, {0, 1},
94 {0, 1}, {0, 1}, {0, 1}, {0, 1},
95 {0, 1}, {0, 1}, {0, 1}, {0, 1},
98 static void __init armada_38x_get_clk_ratio(
99 void __iomem *sar, int id, int *mult, int *div)
101 u32 opt = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
102 SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
106 *mult = armada_38x_cpu_l2_ratios[opt][0];
107 *div = armada_38x_cpu_l2_ratios[opt][1];
109 case A380_CPU_TO_DDR:
110 *mult = armada_38x_cpu_ddr_ratios[opt][0];
111 *div = armada_38x_cpu_ddr_ratios[opt][1];
116 static const struct coreclk_soc_desc armada_38x_coreclks = {
117 .get_tclk_freq = armada_38x_get_tclk_freq,
118 .get_cpu_freq = armada_38x_get_cpu_freq,
119 .get_clk_ratio = armada_38x_get_clk_ratio,
120 .ratios = armada_38x_coreclk_ratios,
121 .num_ratios = ARRAY_SIZE(armada_38x_coreclk_ratios),
124 static void __init armada_38x_coreclk_init(struct device_node *np)
126 mvebu_coreclk_setup(np, &armada_38x_coreclks);
128 CLK_OF_DECLARE(armada_38x_core_clk, "marvell,armada-380-core-clock",
129 armada_38x_coreclk_init);
132 * Clock Gating Control
134 static const struct clk_gating_soc_desc armada_38x_gating_desc[] __initconst = {
135 { "audio", NULL, 0 },
143 { "usb3h0", NULL, 9 },
144 { "usb3h1", NULL, 10 },
145 { "usb3d", NULL, 11 },
147 { "crypto0z", NULL, 14 },
148 { "sata0", NULL, 15 },
149 { "crypto1z", NULL, 16 },
150 { "sdio", NULL, 17 },
151 { "usb2", NULL, 18 },
152 { "crypto1", NULL, 21 },
153 { "xor0", NULL, 22 },
154 { "crypto0", NULL, 23 },
156 { "xor1", NULL, 28 },
157 { "sata1", NULL, 30 },
161 static void __init armada_38x_clk_gating_init(struct device_node *np)
163 mvebu_clk_gating_setup(np, armada_38x_gating_desc);
165 CLK_OF_DECLARE(armada_38x_clk_gating, "marvell,armada-380-gating-clock",
166 armada_38x_clk_gating_init);