1 // SPDX-License-Identifier: GPL-2.0
3 * Marvell Armada 375 SoC clocks
5 * Copyright (C) 2014 Marvell
13 #include <linux/kernel.h>
14 #include <linux/clk-provider.h>
24 * For the Armada 375 SoCs, the CPU, DDR and L2 clocks frequencies are
25 * all modified at the same time, and not separately as for the Armada
26 * 370 or the Armada XP SoCs.
28 * SAR1[21:17] : CPU frequency DDR frequency L2 frequency
29 * 6 = 400 MHz 400 MHz 200 MHz
30 * 15 = 600 MHz 600 MHz 300 MHz
31 * 21 = 800 MHz 534 MHz 400 MHz
32 * 25 = 1000 MHz 500 MHz 500 MHz
35 * SAR1[22] : TCLK frequency
40 #define SAR1_A375_TCLK_FREQ_OPT 22
41 #define SAR1_A375_TCLK_FREQ_OPT_MASK 0x1
42 #define SAR1_A375_CPU_DDR_L2_FREQ_OPT 17
43 #define SAR1_A375_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
45 static const u32 armada_375_tclk_frequencies[] __initconst = {
50 static u32 __init armada_375_get_tclk_freq(void __iomem *sar)
54 tclk_freq_select = ((readl(sar) >> SAR1_A375_TCLK_FREQ_OPT) &
55 SAR1_A375_TCLK_FREQ_OPT_MASK);
56 return armada_375_tclk_frequencies[tclk_freq_select];
60 static const u32 armada_375_cpu_frequencies[] __initconst = {
63 0, 0, 0, 0, 0, 0, 0, 0,
71 static u32 __init armada_375_get_cpu_freq(void __iomem *sar)
75 cpu_freq_select = ((readl(sar) >> SAR1_A375_CPU_DDR_L2_FREQ_OPT) &
76 SAR1_A375_CPU_DDR_L2_FREQ_OPT_MASK);
77 if (cpu_freq_select >= ARRAY_SIZE(armada_375_cpu_frequencies)) {
78 pr_err("Selected CPU frequency (%d) unsupported\n",
82 return armada_375_cpu_frequencies[cpu_freq_select];
85 enum { A375_CPU_TO_DDR, A375_CPU_TO_L2 };
87 static const struct coreclk_ratio armada_375_coreclk_ratios[] __initconst = {
88 { .id = A375_CPU_TO_L2, .name = "l2clk" },
89 { .id = A375_CPU_TO_DDR, .name = "ddrclk" },
92 static const int armada_375_cpu_l2_ratios[32][2] __initconst = {
93 {0, 1}, {0, 1}, {0, 1}, {0, 1},
94 {0, 1}, {0, 1}, {1, 2}, {0, 1},
95 {0, 1}, {0, 1}, {0, 1}, {0, 1},
96 {0, 1}, {0, 1}, {0, 1}, {1, 2},
97 {0, 1}, {0, 1}, {0, 1}, {0, 1},
98 {0, 1}, {1, 2}, {0, 1}, {0, 1},
99 {0, 1}, {1, 2}, {0, 1}, {0, 1},
100 {0, 1}, {0, 1}, {0, 1}, {0, 1},
103 static const int armada_375_cpu_ddr_ratios[32][2] __initconst = {
104 {0, 1}, {0, 1}, {0, 1}, {0, 1},
105 {0, 1}, {0, 1}, {1, 1}, {0, 1},
106 {0, 1}, {0, 1}, {0, 1}, {0, 1},
107 {0, 1}, {0, 1}, {0, 1}, {2, 3},
108 {0, 1}, {0, 1}, {0, 1}, {0, 1},
109 {0, 1}, {2, 3}, {0, 1}, {0, 1},
110 {0, 1}, {1, 2}, {0, 1}, {0, 1},
111 {0, 1}, {0, 1}, {0, 1}, {0, 1},
114 static void __init armada_375_get_clk_ratio(
115 void __iomem *sar, int id, int *mult, int *div)
117 u32 opt = ((readl(sar) >> SAR1_A375_CPU_DDR_L2_FREQ_OPT) &
118 SAR1_A375_CPU_DDR_L2_FREQ_OPT_MASK);
122 *mult = armada_375_cpu_l2_ratios[opt][0];
123 *div = armada_375_cpu_l2_ratios[opt][1];
125 case A375_CPU_TO_DDR:
126 *mult = armada_375_cpu_ddr_ratios[opt][0];
127 *div = armada_375_cpu_ddr_ratios[opt][1];
132 static const struct coreclk_soc_desc armada_375_coreclks = {
133 .get_tclk_freq = armada_375_get_tclk_freq,
134 .get_cpu_freq = armada_375_get_cpu_freq,
135 .get_clk_ratio = armada_375_get_clk_ratio,
136 .ratios = armada_375_coreclk_ratios,
137 .num_ratios = ARRAY_SIZE(armada_375_coreclk_ratios),
140 static void __init armada_375_coreclk_init(struct device_node *np)
142 mvebu_coreclk_setup(np, &armada_375_coreclks);
144 CLK_OF_DECLARE(armada_375_core_clk, "marvell,armada-375-core-clock",
145 armada_375_coreclk_init);
148 * Clock Gating Control
150 static const struct clk_gating_soc_desc armada_375_gating_desc[] __initconst = {
156 { "audio", NULL, 8 },
157 { "nd_clk", "nand", 11 },
158 { "sata0_link", "sata0_core", 14 },
159 { "sata0_core", NULL, 15 },
160 { "usb3", NULL, 16 },
161 { "sdio", NULL, 17 },
164 { "sata1_link", "sata1_core", 20 },
165 { "sata1_core", NULL, 21 },
166 { "xor0", NULL, 22 },
167 { "xor1", NULL, 23 },
168 { "copro", NULL, 24 },
170 { "crypto0_enc", NULL, 28 },
171 { "crypto0_core", NULL, 29 },
172 { "crypto1_enc", NULL, 30 },
173 { "crypto1_core", NULL, 31 },
177 static void __init armada_375_clk_gating_init(struct device_node *np)
179 mvebu_clk_gating_setup(np, armada_375_gating_desc);
181 CLK_OF_DECLARE(armada_375_clk_gating, "marvell,armada-375-gating-clock",
182 armada_375_clk_gating_init);